# Building Code Glossary

> Defined terms from the International Building, Residential, Fire, Mechanical, Plumbing and Energy Codes — quoted from the code, compared across codes, and linked to the chapters that use them.

- Canonical: https://harth.build/resources/glossary/

A building code is a machine built out of its own vocabulary. Whether a space is a **mezzanine** or a **story**, whether an area is one **fire area** or two, whether a room is **habitable space** — each of those is a defined term, and each decides which requirements apply. Get the definition wrong and every calculation downstream of it is wrong too.

These pages take the defined terms out of the code chapters published elsewhere on this site, quote each definition with the chapter it came from, and — where two or more of the I-Codes define the same term — set the versions side by side, because that is where the wording quietly differs. Each page also lists the chapters that actually use the term, so you can read the requirements that move when the definition moves.

The text transcribed here is the **2009** model edition. Jurisdictions adopt different editions on different dates and amend them locally, so treat every definition as a starting point and confirm it against the edition your authority having jurisdiction has adopted.

_Prepared by Harth as generated collection navigation. Evidence and review scope are recorded on each linked page._

## Pages

- [AAC Masonry: Building Code Definition](https://harth.build/resources/glossary/aac-masonry.md)
- [Above-grade Wall: Building Code Definition](https://harth.build/resources/glossary/above-grade-wall.md)
- [Absorption System: Building Code Definition](https://harth.build/resources/glossary/absorption-system.md)
- [Accepted Engineering Practice: Building Code Definition](https://harth.build/resources/glossary/accepted-engineering-practice.md)
- [Access (to): Building Code Definition](https://harth.build/resources/glossary/access-to.md)
- [Accessible: Building Code Definition](https://harth.build/resources/glossary/accessible.md)
- [Accessible Means OF Egress: Building Code Definition](https://harth.build/resources/glossary/accessible-means-of-egress.md)
- [Accessible, Readily: Building Code Definition](https://harth.build/resources/glossary/accessible-readily.md)
- [Accessible Route: Building Code Definition](https://harth.build/resources/glossary/accessible-route.md)
- [Accessory Structure: Building Code Definition](https://harth.build/resources/glossary/accessory-structure.md)
- [Accreditation Body: Building Code Definition](https://harth.build/resources/glossary/accreditation-body.md)
- [Adapter Fitting: Building Code Definition](https://harth.build/resources/glossary/adapter-fitting.md)
- [Addition: Building Code Definition](https://harth.build/resources/glossary/addition.md)
- [Adhered Masonry Veneer: Building Code Definition](https://harth.build/resources/glossary/adhered-masonry-veneer.md)
- [Aerosol: Building Code Definition](https://harth.build/resources/glossary/aerosol.md)
- [Aerosol Container: Building Code Definition](https://harth.build/resources/glossary/aerosol-container.md)
- [Agent: Building Code Definition](https://harth.build/resources/glossary/agent.md)
- [Aggregate: Building Code Definition](https://harth.build/resources/glossary/aggregate.md)
- [Agricultural Building: Building Code Definition](https://harth.build/resources/glossary/agricultural-building.md)
- [Air: Building Code Definition](https://harth.build/resources/glossary/air.md)
- [Air Admittance Valve: Building Code Definition](https://harth.build/resources/glossary/air-admittance-valve.md)
- [Air Barrier: Building Code Definition](https://harth.build/resources/glossary/air-barrier.md)
- [Air Conditioning: Building Code Definition](https://harth.build/resources/glossary/air-conditioning.md)
- [Air-conditioning System: Building Code Definition](https://harth.build/resources/glossary/air-conditioning-system.md)
- [Air Distribution System: Building Code Definition](https://harth.build/resources/glossary/air-distribution-system.md)
- [Air, Exhaust: Building Code Definition](https://harth.build/resources/glossary/air-exhaust.md)
- [Air-handling Unit: Building Code Definition](https://harth.build/resources/glossary/air-handling-unit.md)
- [Air-inflated Structure: Building Code Definition](https://harth.build/resources/glossary/air-inflated-structure.md)
- [Air, Makeup: Building Code Definition](https://harth.build/resources/glossary/air-makeup.md)
- [Air-supported Structure: Building Code Definition](https://harth.build/resources/glossary/air-supported-structure.md)
- [Airport: Building Code Definition](https://harth.build/resources/glossary/airport.md)
- [Aisle: Building Code Definition](https://harth.build/resources/glossary/aisle.md)
- [Aisle Accessway: Building Code Definition](https://harth.build/resources/glossary/aisle-accessway.md)
- [Alarm Notification Appliance: Building Code Definition](https://harth.build/resources/glossary/alarm-notification-appliance.md)
- [Alarm Signal: Building Code Definition](https://harth.build/resources/glossary/alarm-signal.md)
- [Alarm Verification Feature: Building Code Definition](https://harth.build/resources/glossary/alarm-verification-feature.md)
- [Alcohol-based Hand Rub: Building Code Definition](https://harth.build/resources/glossary/alcohol-based-hand-rub.md)
- [Allowable Stress Design: Building Code Definition](https://harth.build/resources/glossary/allowable-stress-design.md)
- [Alteration: Building Code Definition](https://harth.build/resources/glossary/alteration.md)
- [Alternating Tread Device: Building Code Definition](https://harth.build/resources/glossary/alternating-tread-device.md)
- [Alternative Engineered Design: Building Code Definition](https://harth.build/resources/glossary/alternative-engineered-design.md)
- [Ambulatory Health Care Facility: Building Code Definition](https://harth.build/resources/glossary/ambulatory-health-care-facility.md)
- [Ampacity: Building Code Definition](https://harth.build/resources/glossary/ampacity.md)
- [Anchor: Building Code Definition](https://harth.build/resources/glossary/anchor.md)
- [Anchor Building: Building Code Definition](https://harth.build/resources/glossary/anchor-building.md)
- [Annunciator: Building Code Definition](https://harth.build/resources/glossary/annunciator.md)
- [Antisiphon: Building Code Definition](https://harth.build/resources/glossary/antisiphon.md)
- [Appliance: Building Code Definition](https://harth.build/resources/glossary/appliance.md)
- [Appliance, Existing: Building Code Definition](https://harth.build/resources/glossary/appliance-existing.md)
- [Appliance, Vented: Building Code Definition](https://harth.build/resources/glossary/appliance-vented.md)
- [Approved: Building Code Definition](https://harth.build/resources/glossary/approved.md)
- [Approved Agency: Building Code Definition](https://harth.build/resources/glossary/approved-agency.md)
- [Approved Source: Building Code Definition](https://harth.build/resources/glossary/approved-source.md)
- [Area, Building: Building Code Definition](https://harth.build/resources/glossary/area-building.md)
- [Area Drain: Building Code Definition](https://harth.build/resources/glossary/area-drain.md)
- [Area OF Refuge: Building Code Definition](https://harth.build/resources/glossary/area-of-refuge.md)
- [Array: Building Code Definition](https://harth.build/resources/glossary/array.md)
- [Aspect Ratio: Building Code Definition](https://harth.build/resources/glossary/aspect-ratio.md)
- [ASTM D 2855: Building Code Definition](https://harth.build/resources/glossary/astm-d-2855.md)
- [Atmospheric Pressure: Building Code Definition](https://harth.build/resources/glossary/atmospheric-pressure.md)
- [Atrium: Building Code Definition](https://harth.build/resources/glossary/atrium.md)
- [Attic: Building Code Definition](https://harth.build/resources/glossary/attic.md)
- [Attic, Habitable: Building Code Definition](https://harth.build/resources/glossary/attic-habitable.md)
- [Audible Alarm Notification Appliance: Building Code Definition](https://harth.build/resources/glossary/audible-alarm-notification-appliance.md)
- [Autoclaved Aerated Concrete (AAC): Building Code Definition](https://harth.build/resources/glossary/autoclaved-aerated-concrete-aac.md)
- [Automatic: Building Code Definition](https://harth.build/resources/glossary/automatic.md)
- [Automatic Fire-extinguishing System: Building Code Definition](https://harth.build/resources/glossary/automatic-fire-extinguishing-system.md)
- [Automatic Smoke Detection System: Building Code Definition](https://harth.build/resources/glossary/automatic-smoke-detection-system.md)
- [Automatic Sprinkler System: Building Code Definition](https://harth.build/resources/glossary/automatic-sprinkler-system.md)
- [Average Ambient Sound Level: Building Code Definition](https://harth.build/resources/glossary/average-ambient-sound-level.md)
- [Awning: Building Code Definition](https://harth.build/resources/glossary/awning.md)
- [Backflow: Building Code Definition](https://harth.build/resources/glossary/backflow.md)
- [Backflow Preventer, Reduced-pressure-zone Type: Building Code Definition](https://harth.build/resources/glossary/backflow-preventer-reduced-pressure-zone-type.md)
- [Backing: Building Code Definition](https://harth.build/resources/glossary/backing.md)
- [Backwater Valve: Building Code Definition](https://harth.build/resources/glossary/backwater-valve.md)
- [Baled Cotton: Building Code Definition](https://harth.build/resources/glossary/baled-cotton.md)
- [Baled Cotton, Densely Packed: Building Code Definition](https://harth.build/resources/glossary/baled-cotton-densely-packed.md)
- [Ballast: Building Code Definition](https://harth.build/resources/glossary/ballast.md)
- [Barricade: Building Code Definition](https://harth.build/resources/glossary/barricade.md)
- [Base Flood: Building Code Definition](https://harth.build/resources/glossary/base-flood.md)
- [Base Flood Elevation: Building Code Definition](https://harth.build/resources/glossary/base-flood-elevation.md)
- [Basement: Building Code Definition](https://harth.build/resources/glossary/basement.md)
- [Basement Wall: Building Code Definition](https://harth.build/resources/glossary/basement-wall.md)
- [Basic Wind Speed: Building Code Definition](https://harth.build/resources/glossary/basic-wind-speed.md)
- [Bathroom: Building Code Definition](https://harth.build/resources/glossary/bathroom.md)
- [Bathroom Group: Building Code Definition](https://harth.build/resources/glossary/bathroom-group.md)
- [Bed Joint: Building Code Definition](https://harth.build/resources/glossary/bed-joint.md)
- [Bend: Building Code Definition](https://harth.build/resources/glossary/bend.md)
- [Blasting Agent: Building Code Definition](https://harth.build/resources/glossary/blasting-agent.md)
- [Bleachers: Building Code Definition](https://harth.build/resources/glossary/bleachers.md)
- [Boarding House: Building Code Definition](https://harth.build/resources/glossary/boarding-house.md)
- [Boiler: Building Code Definition](https://harth.build/resources/glossary/boiler.md)
- [Boiler Room: Building Code Definition](https://harth.build/resources/glossary/boiler-room.md)
- [Boiling Point: Building Code Definition](https://harth.build/resources/glossary/boiling-point.md)
- [Bond Beam: Building Code Definition](https://harth.build/resources/glossary/bond-beam.md)
- [Bonding Jumper: Building Code Definition](https://harth.build/resources/glossary/bonding-jumper.md)
- [Braced Wall Line: Building Code Definition](https://harth.build/resources/glossary/braced-wall-line.md)
- [Braced Wall Panel: Building Code Definition](https://harth.build/resources/glossary/braced-wall-panel.md)
- [Branch: Building Code Definition](https://harth.build/resources/glossary/branch.md)
- [Branch Circuit: Building Code Definition](https://harth.build/resources/glossary/branch-circuit.md)
- [Branch Circuit, Individual: Building Code Definition](https://harth.build/resources/glossary/branch-circuit-individual.md)
- [Branch Circuit, Multiwire: Building Code Definition](https://harth.build/resources/glossary/branch-circuit-multiwire.md)
- [Branch Interval: Building Code Definition](https://harth.build/resources/glossary/branch-interval.md)
- [Branch Vent: Building Code Definition](https://harth.build/resources/glossary/branch-vent.md)
- [Brazed Joint: Building Code Definition](https://harth.build/resources/glossary/brazed-joint.md)
- [Brazing: Building Code Definition](https://harth.build/resources/glossary/brazing.md)
- [Btu: Building Code Definition](https://harth.build/resources/glossary/btu.md)
- [Btu/h: Building Code Definition](https://harth.build/resources/glossary/btu-h.md)
- [Building: Building Code Definition](https://harth.build/resources/glossary/building.md)
- [Building Drain: Building Code Definition](https://harth.build/resources/glossary/building-drain.md)
- [Building Element: Building Code Definition](https://harth.build/resources/glossary/building-element.md)
- [Building, Existing: Building Code Definition](https://harth.build/resources/glossary/building-existing.md)
- [Building Line: Building Code Definition](https://harth.build/resources/glossary/building-line.md)
- [Building Official: Building Code Definition](https://harth.build/resources/glossary/building-official.md)
- [Building Sewer: Building Code Definition](https://harth.build/resources/glossary/building-sewer.md)
- [Building Subdrain: Building Code Definition](https://harth.build/resources/glossary/building-subdrain.md)
- [Building Thermal Envelope: Building Code Definition](https://harth.build/resources/glossary/building-thermal-envelope.md)
- [Building Trap: Building Code Definition](https://harth.build/resources/glossary/building-trap.md)
- [Built-up Roof Covering: Building Code Definition](https://harth.build/resources/glossary/built-up-roof-covering.md)
- [Bulk Hydrogen Compressed Gas System: Building Code Definition](https://harth.build/resources/glossary/bulk-hydrogen-compressed-gas-system.md)
- [Bulk Liquefied Hydrogen Gas System: Building Code Definition](https://harth.build/resources/glossary/bulk-liquefied-hydrogen-gas-system.md)
- [Bulk Oxygen System: Building Code Definition](https://harth.build/resources/glossary/bulk-oxygen-system.md)
- [Bulk Plant or Terminal: Building Code Definition](https://harth.build/resources/glossary/bulk-plant-or-terminal.md)
- [Bulk Transfer: Building Code Definition](https://harth.build/resources/glossary/bulk-transfer.md)
- [Bullet Resistant: Building Code Definition](https://harth.build/resources/glossary/bullet-resistant.md)
- [Burner: Building Code Definition](https://harth.build/resources/glossary/burner.md)
- [Cabinet: Building Code Definition](https://harth.build/resources/glossary/cabinet.md)
- [Cable-restrained, Air-supported Structure: Building Code Definition](https://harth.build/resources/glossary/cable-restrained-air-supported-structure.md)
- [Canopy: Building Code Definition](https://harth.build/resources/glossary/canopy.md)
- [Carbon Dioxide Extinguishing System: Building Code Definition](https://harth.build/resources/glossary/carbon-dioxide-extinguishing-system.md)
- [Carbon Dioxide Extinguishing Systems: Building Code Definition](https://harth.build/resources/glossary/carbon-dioxide-extinguishing-systems.md)
- [Carton: Building Code Definition](https://harth.build/resources/glossary/carton.md)
- [Cast Stone: Building Code Definition](https://harth.build/resources/glossary/cast-stone.md)
- [Ceiling Height: Building Code Definition](https://harth.build/resources/glossary/ceiling-height.md)
- [Ceiling Limit: Building Code Definition](https://harth.build/resources/glossary/ceiling-limit.md)
- [Ceiling Radiation Damper: Building Code Definition](https://harth.build/resources/glossary/ceiling-radiation-damper.md)
- [Cell: Building Code Definition](https://harth.build/resources/glossary/cell.md)
- [Cement Plaster: Building Code Definition](https://harth.build/resources/glossary/cement-plaster.md)
- [Certificate OF Compliance: Building Code Definition](https://harth.build/resources/glossary/certificate-of-compliance.md)
- [Change OF Occupancy: Building Code Definition](https://harth.build/resources/glossary/change-of-occupancy.md)
- [Chemical: Building Code Definition](https://harth.build/resources/glossary/chemical.md)
- [Chemical Name: Building Code Definition](https://harth.build/resources/glossary/chemical-name.md)
- [Child Care Facilities: Building Code Definition](https://harth.build/resources/glossary/child-care-facilities.md)
- [Chimney: Building Code Definition](https://harth.build/resources/glossary/chimney.md)
- [Chimney Connector: Building Code Definition](https://harth.build/resources/glossary/chimney-connector.md)
- [Circuit Breaker: Building Code Definition](https://harth.build/resources/glossary/circuit-breaker.md)
- [Circuit Vent: Building Code Definition](https://harth.build/resources/glossary/circuit-vent.md)
- [Circulation Path: Building Code Definition](https://harth.build/resources/glossary/circulation-path.md)
- [Cladding: Building Code Definition](https://harth.build/resources/glossary/cladding.md)
- [Class 2 Circuit: Building Code Definition](https://harth.build/resources/glossary/class-2-circuit.md)
- [Clean Agent: Building Code Definition](https://harth.build/resources/glossary/clean-agent.md)
- [Cleanout: Building Code Definition](https://harth.build/resources/glossary/cleanout.md)
- [Clearance: Building Code Definition](https://harth.build/resources/glossary/clearance.md)
- [Clinic, Outpatient: Building Code Definition](https://harth.build/resources/glossary/clinic-outpatient.md)
- [Closed Container: Building Code Definition](https://harth.build/resources/glossary/closed-container.md)
- [Closed System: Building Code Definition](https://harth.build/resources/glossary/closed-system.md)
- [Clothes Closet: Building Code Definition](https://harth.build/resources/glossary/clothes-closet.md)
- [Clothes Dryer: Building Code Definition](https://harth.build/resources/glossary/clothes-dryer.md)
- [Code: Building Code Definition](https://harth.build/resources/glossary/code.md)
- [Code Official: Building Code Definition](https://harth.build/resources/glossary/code-official.md)
- [Collar Joint: Building Code Definition](https://harth.build/resources/glossary/collar-joint.md)
- [Collector: Building Code Definition](https://harth.build/resources/glossary/collector.md)
- [Combination Fire/smoke Damper: Building Code Definition](https://harth.build/resources/glossary/combination-fire-smoke-damper.md)
- [Combination Waste and Vent System: Building Code Definition](https://harth.build/resources/glossary/combination-waste-and-vent-system.md)
- [Combustible Dust: Building Code Definition](https://harth.build/resources/glossary/combustible-dust.md)
- [Combustible Fibers: Building Code Definition](https://harth.build/resources/glossary/combustible-fibers.md)
- [Combustible Liquid: Building Code Definition](https://harth.build/resources/glossary/combustible-liquid.md)
- [Combustible Liquids: Building Code Definition](https://harth.build/resources/glossary/combustible-liquids.md)
- [Combustion: Building Code Definition](https://harth.build/resources/glossary/combustion.md)
- [Combustion Air: Building Code Definition](https://harth.build/resources/glossary/combustion-air.md)
- [Combustion Chamber: Building Code Definition](https://harth.build/resources/glossary/combustion-chamber.md)
- [Combustion Products: Building Code Definition](https://harth.build/resources/glossary/combustion-products.md)
- [Commercial Building: Building Code Definition](https://harth.build/resources/glossary/commercial-building.md)
- [Commercial Cooking Appliances: Building Code Definition](https://harth.build/resources/glossary/commercial-cooking-appliances.md)
- [Commodity: Building Code Definition](https://harth.build/resources/glossary/commodity.md)
- [Common Path OF Egress Travel: Building Code Definition](https://harth.build/resources/glossary/common-path-of-egress-travel.md)
- [Common Vent: Building Code Definition](https://harth.build/resources/glossary/common-vent.md)
- [Compensating Hoods: Building Code Definition](https://harth.build/resources/glossary/compensating-hoods.md)
- [Compressed Gas Container: Building Code Definition](https://harth.build/resources/glossary/compressed-gas-container.md)
- [Compressed Gas System: Building Code Definition](https://harth.build/resources/glossary/compressed-gas-system.md)
- [Compressive Strength OF Masonry: Building Code Definition](https://harth.build/resources/glossary/compressive-strength-of-masonry.md)
- [Compressor: Building Code Definition](https://harth.build/resources/glossary/compressor.md)
- [Concealed: Building Code Definition](https://harth.build/resources/glossary/concealed.md)
- [Concealed Fouling Surface: Building Code Definition](https://harth.build/resources/glossary/concealed-fouling-surface.md)
- [Concealed Location: Building Code Definition](https://harth.build/resources/glossary/concealed-location.md)
- [Concealed Piping: Building Code Definition](https://harth.build/resources/glossary/concealed-piping.md)
- [Concrete, Cellular: Building Code Definition](https://harth.build/resources/glossary/concrete-cellular.md)
- [Concrete, Lightweight Aggregate: Building Code Definition](https://harth.build/resources/glossary/concrete-lightweight-aggregate.md)
- [Concrete, Perlite: Building Code Definition](https://harth.build/resources/glossary/concrete-perlite.md)
- [Concrete, Vermiculite: Building Code Definition](https://harth.build/resources/glossary/concrete-vermiculite.md)
- [Condensate: Building Code Definition](https://harth.build/resources/glossary/condensate.md)
- [Condenser: Building Code Definition](https://harth.build/resources/glossary/condenser.md)
- [Condensing Appliance: Building Code Definition](https://harth.build/resources/glossary/condensing-appliance.md)
- [Conditioned Air: Building Code Definition](https://harth.build/resources/glossary/conditioned-air.md)
- [Conditioned Area: Building Code Definition](https://harth.build/resources/glossary/conditioned-area.md)
- [Conditioned Floor Area: Building Code Definition](https://harth.build/resources/glossary/conditioned-floor-area.md)
- [Conditioned Space: Building Code Definition](https://harth.build/resources/glossary/conditioned-space.md)
- [Conductor: Building Code Definition](https://harth.build/resources/glossary/conductor.md)
- [Conduit Body: Building Code Definition](https://harth.build/resources/glossary/conduit-body.md)
- [Congregate Living Facilities: Building Code Definition](https://harth.build/resources/glossary/congregate-living-facilities.md)
- [Connector: Building Code Definition](https://harth.build/resources/glossary/connector.md)
- [Constantly Attended Location: Building Code Definition](https://harth.build/resources/glossary/constantly-attended-location.md)
- [Construction Documents: Building Code Definition](https://harth.build/resources/glossary/construction-documents.md)
- [Container: Building Code Definition](https://harth.build/resources/glossary/container.md)
- [Containment System: Building Code Definition](https://harth.build/resources/glossary/containment-system.md)
- [Contamination: Building Code Definition](https://harth.build/resources/glossary/contamination.md)
- [Continuous Gas Detection System: Building Code Definition](https://harth.build/resources/glossary/continuous-gas-detection-system.md)
- [Continuous Load: Building Code Definition](https://harth.build/resources/glossary/continuous-load.md)
- [Control: Building Code Definition](https://harth.build/resources/glossary/control.md)
- [Control Area: Building Code Definition](https://harth.build/resources/glossary/control-area.md)
- [Control, Limit: Building Code Definition](https://harth.build/resources/glossary/control-limit.md)
- [Conventional Light-frame Construction: Building Code Definition](https://harth.build/resources/glossary/conventional-light-frame-construction.md)
- [Conversion Burner: Building Code Definition](https://harth.build/resources/glossary/conversion-burner.md)
- [Cooking Unit, Counter-mounted: Building Code Definition](https://harth.build/resources/glossary/cooking-unit-counter-mounted.md)
- [Core: Building Code Definition](https://harth.build/resources/glossary/core.md)
- [Corridor: Building Code Definition](https://harth.build/resources/glossary/corridor.md)
- [Corrosion Resistance: Building Code Definition](https://harth.build/resources/glossary/corrosion-resistance.md)
- [Corrosive: Building Code Definition](https://harth.build/resources/glossary/corrosive.md)
- [Court: Building Code Definition](https://harth.build/resources/glossary/court.md)
- [Cover: Building Code Definition](https://harth.build/resources/glossary/cover.md)
- [Covered Mall Building: Building Code Definition](https://harth.build/resources/glossary/covered-mall-building.md)
- [Crawl Space Wall: Building Code Definition](https://harth.build/resources/glossary/crawl-space-wall.md)
- [Cripple Wall: Building Code Definition](https://harth.build/resources/glossary/cripple-wall.md)
- [Critical Level (C-L): Building Code Definition](https://harth.build/resources/glossary/critical-level-c-l.md)
- [Cross Connection: Building Code Definition](https://harth.build/resources/glossary/cross-connection.md)
- [Cryogenic Fluid: Building Code Definition](https://harth.build/resources/glossary/cryogenic-fluid.md)
- [Cryogenic Vessel: Building Code Definition](https://harth.build/resources/glossary/cryogenic-vessel.md)
- [Cubic Foot: Building Code Definition](https://harth.build/resources/glossary/cubic-foot.md)
- [Curtain Wall: Building Code Definition](https://harth.build/resources/glossary/curtain-wall.md)
- [Cutout Box: Building Code Definition](https://harth.build/resources/glossary/cutout-box.md)
- [Cylinder: Building Code Definition](https://harth.build/resources/glossary/cylinder.md)
- [Dalle Glass: Building Code Definition](https://harth.build/resources/glossary/dalle-glass.md)
- [Damper: Building Code Definition](https://harth.build/resources/glossary/damper.md)
- [Damper, Volume: Building Code Definition](https://harth.build/resources/glossary/damper-volume.md)
- [Dangerous: Building Code Definition](https://harth.build/resources/glossary/dangerous.md)
- [Day Box: Building Code Definition](https://harth.build/resources/glossary/day-box.md)
- [Dead End: Building Code Definition](https://harth.build/resources/glossary/dead-end.md)
- [Dead Loads: Building Code Definition](https://harth.build/resources/glossary/dead-loads.md)
- [Decorative Glass: Building Code Definition](https://harth.build/resources/glossary/decorative-glass.md)
- [Decorative Materials: Building Code Definition](https://harth.build/resources/glossary/decorative-materials.md)
- [Deep Foundation: Building Code Definition](https://harth.build/resources/glossary/deep-foundation.md)
- [Deflagration: Building Code Definition](https://harth.build/resources/glossary/deflagration.md)
- [Deluge System: Building Code Definition](https://harth.build/resources/glossary/deluge-system.md)
- [Demand: Building Code Definition](https://harth.build/resources/glossary/demand.md)
- [Design Earthquake Ground Motion: Building Code Definition](https://harth.build/resources/glossary/design-earthquake-ground-motion.md)
- [Design Flood: Building Code Definition](https://harth.build/resources/glossary/design-flood.md)
- [Design Flood Elevation: Building Code Definition](https://harth.build/resources/glossary/design-flood-elevation.md)
- [Design Pressure: Building Code Definition](https://harth.build/resources/glossary/design-pressure.md)
- [Design Strength: Building Code Definition](https://harth.build/resources/glossary/design-strength.md)
- [Designated Seismic System: Building Code Definition](https://harth.build/resources/glossary/designated-seismic-system.md)
- [Detached Building: Building Code Definition](https://harth.build/resources/glossary/detached-building.md)
- [Detector, Heat: Building Code Definition](https://harth.build/resources/glossary/detector-heat.md)
- [Detonating Cord: Building Code Definition](https://harth.build/resources/glossary/detonating-cord.md)
- [Detonation: Building Code Definition](https://harth.build/resources/glossary/detonation.md)
- [Detonator: Building Code Definition](https://harth.build/resources/glossary/detonator.md)
- [Detoxification Facilities: Building Code Definition](https://harth.build/resources/glossary/detoxification-facilities.md)
- [Developed Length: Building Code Definition](https://harth.build/resources/glossary/developed-length.md)
- [Device: Building Code Definition](https://harth.build/resources/glossary/device.md)
- [Diameter: Building Code Definition](https://harth.build/resources/glossary/diameter.md)
- [Diaphragm: Building Code Definition](https://harth.build/resources/glossary/diaphragm.md)
- [Dilution Air: Building Code Definition](https://harth.build/resources/glossary/dilution-air.md)
- [Dip Tank: Building Code Definition](https://harth.build/resources/glossary/dip-tank.md)
- [Direct-vent Appliance: Building Code Definition](https://harth.build/resources/glossary/direct-vent-appliance.md)
- [Direct-vent Appliances: Building Code Definition](https://harth.build/resources/glossary/direct-vent-appliances.md)
- [Discharge Pipe: Building Code Definition](https://harth.build/resources/glossary/discharge-pipe.md)
- [Disconnecting Means: Building Code Definition](https://harth.build/resources/glossary/disconnecting-means.md)
- [Dispensing: Building Code Definition](https://harth.build/resources/glossary/dispensing.md)
- [Dispensing Device, Overhead Type: Building Code Definition](https://harth.build/resources/glossary/dispensing-device-overhead-type.md)
- [Display Site: Building Code Definition](https://harth.build/resources/glossary/display-site.md)
- [Door, Balanced: Building Code Definition](https://harth.build/resources/glossary/door-balanced.md)
- [Dormitory: Building Code Definition](https://harth.build/resources/glossary/dormitory.md)
- [Draft: Building Code Definition](https://harth.build/resources/glossary/draft.md)
- [Draft Curtain: Building Code Definition](https://harth.build/resources/glossary/draft-curtain.md)
- [Draft Hood: Building Code Definition](https://harth.build/resources/glossary/draft-hood.md)
- [Draft Regulator: Building Code Definition](https://harth.build/resources/glossary/draft-regulator.md)
- [Draftstop: Building Code Definition](https://harth.build/resources/glossary/draftstop.md)
- [Drain: Building Code Definition](https://harth.build/resources/glossary/drain.md)
- [Drainage Fitting: Building Code Definition](https://harth.build/resources/glossary/drainage-fitting.md)
- [Drainage Fittings: Building Code Definition](https://harth.build/resources/glossary/drainage-fittings.md)
- [Drainage System: Building Code Definition](https://harth.build/resources/glossary/drainage-system.md)
- [Drip: Building Code Definition](https://harth.build/resources/glossary/drip.md)
- [Dry-chemical Extinguishing Agent: Building Code Definition](https://harth.build/resources/glossary/dry-chemical-extinguishing-agent.md)
- [Dry Cleaning: Building Code Definition](https://harth.build/resources/glossary/dry-cleaning.md)
- [Dry Cleaning Plant: Building Code Definition](https://harth.build/resources/glossary/dry-cleaning-plant.md)
- [Dry Cleaning Room: Building Code Definition](https://harth.build/resources/glossary/dry-cleaning-room.md)
- [Dry Cleaning System: Building Code Definition](https://harth.build/resources/glossary/dry-cleaning-system.md)
- [Dry Floodproofing: Building Code Definition](https://harth.build/resources/glossary/dry-floodproofing.md)
- [Duct: Building Code Definition](https://harth.build/resources/glossary/duct.md)
- [Duct Furnace: Building Code Definition](https://harth.build/resources/glossary/duct-furnace.md)
- [Duct System: Building Code Definition](https://harth.build/resources/glossary/duct-system.md)
- [Duration OF Load: Building Code Definition](https://harth.build/resources/glossary/duration-of-load.md)
- [Dwelling: Building Code Definition](https://harth.build/resources/glossary/dwelling.md)
- [Dwelling Unit: Building Code Definition](https://harth.build/resources/glossary/dwelling-unit.md)
- [DWV: Building Code Definition](https://harth.build/resources/glossary/dwv.md)
- [Early Suppression Fast-response (ESFR) Sprinkler: Building Code Definition](https://harth.build/resources/glossary/early-suppression-fast-response-esfr-sprinkler.md)
- [Effective Opening: Building Code Definition](https://harth.build/resources/glossary/effective-opening.md)
- [Egress Court: Building Code Definition](https://harth.build/resources/glossary/egress-court.md)
- [Elbow: Building Code Definition](https://harth.build/resources/glossary/elbow.md)
- [Electrostatic Fluidized Bed: Building Code Definition](https://harth.build/resources/glossary/electrostatic-fluidized-bed.md)
- [Elevator Group: Building Code Definition](https://harth.build/resources/glossary/elevator-group.md)
- [Emergency Alarm System: Building Code Definition](https://harth.build/resources/glossary/emergency-alarm-system.md)
- [Emergency Control Station: Building Code Definition](https://harth.build/resources/glossary/emergency-control-station.md)
- [Emergency Escape and Rescue Opening: Building Code Definition](https://harth.build/resources/glossary/emergency-escape-and-rescue-opening.md)
- [Emergency Floor Drain: Building Code Definition](https://harth.build/resources/glossary/emergency-floor-drain.md)
- [Emergency Shutoff Valve: Building Code Definition](https://harth.build/resources/glossary/emergency-shutoff-valve.md)
- [Emergency Shutoff Valve, Automatic: Building Code Definition](https://harth.build/resources/glossary/emergency-shutoff-valve-automatic.md)
- [Emergency Shutoff Valve, Manual: Building Code Definition](https://harth.build/resources/glossary/emergency-shutoff-valve-manual.md)
- [Emergency Voice/alarm Communications: Building Code Definition](https://harth.build/resources/glossary/emergency-voice-alarm-communications.md)
- [Employee Work Area: Building Code Definition](https://harth.build/resources/glossary/employee-work-area.md)
- [Enclosed: Building Code Definition](https://harth.build/resources/glossary/enclosed.md)
- [Enclosure: Building Code Definition](https://harth.build/resources/glossary/enclosure.md)
- [Energized: Building Code Definition](https://harth.build/resources/glossary/energized.md)
- [Energy Cost: Building Code Definition](https://harth.build/resources/glossary/energy-cost.md)
- [Energy Recovery Ventilation System: Building Code Definition](https://harth.build/resources/glossary/energy-recovery-ventilation-system.md)
- [Entrance Door: Building Code Definition](https://harth.build/resources/glossary/entrance-door.md)
- [Environmental Air: Building Code Definition](https://harth.build/resources/glossary/environmental-air.md)
- [Equipment: Building Code Definition](https://harth.build/resources/glossary/equipment.md)
- [Equipment, Existing: Building Code Definition](https://harth.build/resources/glossary/equipment-existing.md)
- [Equipment Platform: Building Code Definition](https://harth.build/resources/glossary/equipment-platform.md)
- [Equivalent Length: Building Code Definition](https://harth.build/resources/glossary/equivalent-length.md)
- [Essentially Nontoxic Transfer Fluids: Building Code Definition](https://harth.build/resources/glossary/essentially-nontoxic-transfer-fluids.md)
- [Essentially Toxic Transfer Fluids: Building Code Definition](https://harth.build/resources/glossary/essentially-toxic-transfer-fluids.md)
- [Evaporative Cooler: Building Code Definition](https://harth.build/resources/glossary/evaporative-cooler.md)
- [Evaporator: Building Code Definition](https://harth.build/resources/glossary/evaporator.md)
- [Excess Air: Building Code Definition](https://harth.build/resources/glossary/excess-air.md)
- [Excess Flow Control: Building Code Definition](https://harth.build/resources/glossary/excess-flow-control.md)
- [Exhaust System: Building Code Definition](https://harth.build/resources/glossary/exhaust-system.md)
- [Exhausted Enclosure: Building Code Definition](https://harth.build/resources/glossary/exhausted-enclosure.md)
- [Existing: Building Code Definition](https://harth.build/resources/glossary/existing.md)
- [Existing Construction: Building Code Definition](https://harth.build/resources/glossary/existing-construction.md)
- [Existing Installations: Building Code Definition](https://harth.build/resources/glossary/existing-installations.md)
- [Existing Structure: Building Code Definition](https://harth.build/resources/glossary/existing-structure.md)
- [Exit: Building Code Definition](https://harth.build/resources/glossary/exit.md)
- [Exit Access: Building Code Definition](https://harth.build/resources/glossary/exit-access.md)
- [Exit Access Doorway: Building Code Definition](https://harth.build/resources/glossary/exit-access-doorway.md)
- [Exit Discharge: Building Code Definition](https://harth.build/resources/glossary/exit-discharge.md)
- [Exit Discharge, Level OF: Building Code Definition](https://harth.build/resources/glossary/exit-discharge-level-of.md)
- [Exit Enclosure: Building Code Definition](https://harth.build/resources/glossary/exit-enclosure.md)
- [Exit, Horizontal: Building Code Definition](https://harth.build/resources/glossary/exit-horizontal.md)
- [Exit Passageway: Building Code Definition](https://harth.build/resources/glossary/exit-passageway.md)
- [Expanded Vinyl Wall Covering: Building Code Definition](https://harth.build/resources/glossary/expanded-vinyl-wall-covering.md)
- [Explosion: Building Code Definition](https://harth.build/resources/glossary/explosion.md)
- [Explosive: Building Code Definition](https://harth.build/resources/glossary/explosive.md)
- [Explosive Material: Building Code Definition](https://harth.build/resources/glossary/explosive-material.md)
- [Exposed: Building Code Definition](https://harth.build/resources/glossary/exposed.md)
- [Exterior Insulation and Finish Systems (EIFS): Building Code Definition](https://harth.build/resources/glossary/exterior-insulation-and-finish-systems-eifs.md)
- [Exterior Insulation and Finish Systems (EIFS) with Drainage: Building Code Definition](https://harth.build/resources/glossary/exterior-insulation-and-finish-systems-eifs-with-drainage.md)
- [Exterior Wall: Building Code Definition](https://harth.build/resources/glossary/exterior-wall.md)
- [Exterior Wall Covering: Building Code Definition](https://harth.build/resources/glossary/exterior-wall-covering.md)
- [Exterior Wall Envelope: Building Code Definition](https://harth.build/resources/glossary/exterior-wall-envelope.md)
- [Fabric Partition: Building Code Definition](https://harth.build/resources/glossary/fabric-partition.md)
- [Fabricated Item: Building Code Definition](https://harth.build/resources/glossary/fabricated-item.md)
- [Fabrication Area: Building Code Definition](https://harth.build/resources/glossary/fabrication-area.md)
- [Facility: Building Code Definition](https://harth.build/resources/glossary/facility.md)
- [Facing: Building Code Definition](https://harth.build/resources/glossary/facing.md)
- [Factored Load: Building Code Definition](https://harth.build/resources/glossary/factored-load.md)
- [Factory-built Chimney: Building Code Definition](https://harth.build/resources/glossary/factory-built-chimney.md)
- [Fail-safe: Building Code Definition](https://harth.build/resources/glossary/fail-safe.md)
- [Fallout Area: Building Code Definition](https://harth.build/resources/glossary/fallout-area.md)
- [False Alarm: Building Code Definition](https://harth.build/resources/glossary/false-alarm.md)
- [Fan System Bhp: Building Code Definition](https://harth.build/resources/glossary/fan-system-bhp.md)
- [Faucet: Building Code Definition](https://harth.build/resources/glossary/faucet.md)
- [Feeder: Building Code Definition](https://harth.build/resources/glossary/feeder.md)
- [Fenestration: Building Code Definition](https://harth.build/resources/glossary/fenestration.md)
- [Fiber-cement Siding: Building Code Definition](https://harth.build/resources/glossary/fiber-cement-siding.md)
- [Fiberboard: Building Code Definition](https://harth.build/resources/glossary/fiberboard.md)
- [Fill Valve: Building Code Definition](https://harth.build/resources/glossary/fill-valve.md)
- [Fines: Building Code Definition](https://harth.build/resources/glossary/fines.md)
- [Fire Alarm: Building Code Definition](https://harth.build/resources/glossary/fire-alarm.md)
- [Fire Alarm Control Unit: Building Code Definition](https://harth.build/resources/glossary/fire-alarm-control-unit.md)
- [Fire Alarm Signal: Building Code Definition](https://harth.build/resources/glossary/fire-alarm-signal.md)
- [Fire Alarm System: Building Code Definition](https://harth.build/resources/glossary/fire-alarm-system.md)
- [Fire Apparatus Access Road: Building Code Definition](https://harth.build/resources/glossary/fire-apparatus-access-road.md)
- [Fire Area: Building Code Definition](https://harth.build/resources/glossary/fire-area.md)
- [Fire Barrier: Building Code Definition](https://harth.build/resources/glossary/fire-barrier.md)
- [Fire Chief: Building Code Definition](https://harth.build/resources/glossary/fire-chief.md)
- [Fire Code Official: Building Code Definition](https://harth.build/resources/glossary/fire-code-official.md)
- [Fire Command Center: Building Code Definition](https://harth.build/resources/glossary/fire-command-center.md)
- [Fire Damper: Building Code Definition](https://harth.build/resources/glossary/fire-damper.md)
- [Fire Detector, Automatic: Building Code Definition](https://harth.build/resources/glossary/fire-detector-automatic.md)
- [Fire Door Assembly: Building Code Definition](https://harth.build/resources/glossary/fire-door-assembly.md)
- [Fire Exit Hardware: Building Code Definition](https://harth.build/resources/glossary/fire-exit-hardware.md)
- [Fire Lane: Building Code Definition](https://harth.build/resources/glossary/fire-lane.md)
- [Fire Partition: Building Code Definition](https://harth.build/resources/glossary/fire-partition.md)
- [Fire Point: Building Code Definition](https://harth.build/resources/glossary/fire-point.md)
- [Fire Protection Rating: Building Code Definition](https://harth.build/resources/glossary/fire-protection-rating.md)
- [Fire Protection System: Building Code Definition](https://harth.build/resources/glossary/fire-protection-system.md)
- [Fire Resistance: Building Code Definition](https://harth.build/resources/glossary/fire-resistance.md)
- [Fire-resistance Rating: Building Code Definition](https://harth.build/resources/glossary/fire-resistance-rating.md)
- [Fire-resistant Joint System: Building Code Definition](https://harth.build/resources/glossary/fire-resistant-joint-system.md)
- [Fire-retardant-treated Wood: Building Code Definition](https://harth.build/resources/glossary/fire-retardant-treated-wood.md)
- [Fire Safety Functions: Building Code Definition](https://harth.build/resources/glossary/fire-safety-functions.md)
- [Fire Separation Distance: Building Code Definition](https://harth.build/resources/glossary/fire-separation-distance.md)
- [Fire Wall: Building Code Definition](https://harth.build/resources/glossary/fire-wall.md)
- [Fire Watch: Building Code Definition](https://harth.build/resources/glossary/fire-watch.md)
- [Fireblocking: Building Code Definition](https://harth.build/resources/glossary/fireblocking.md)
- [Fireplace: Building Code Definition](https://harth.build/resources/glossary/fireplace.md)
- [Fireplace Stove: Building Code Definition](https://harth.build/resources/glossary/fireplace-stove.md)
- [Fireplace Throat: Building Code Definition](https://harth.build/resources/glossary/fireplace-throat.md)
- [Fireworks: Building Code Definition](https://harth.build/resources/glossary/fireworks.md)
- [Fireworks Display: Building Code Definition](https://harth.build/resources/glossary/fireworks-display.md)
- [Fitting: Building Code Definition](https://harth.build/resources/glossary/fitting.md)
- [Fixed Base Operator (FBO): Building Code Definition](https://harth.build/resources/glossary/fixed-base-operator-fbo.md)
- [Fixture Branch: Building Code Definition](https://harth.build/resources/glossary/fixture-branch.md)
- [Fixture Drain: Building Code Definition](https://harth.build/resources/glossary/fixture-drain.md)
- [Fixture Supply: Building Code Definition](https://harth.build/resources/glossary/fixture-supply.md)
- [Flame Safeguard: Building Code Definition](https://harth.build/resources/glossary/flame-safeguard.md)
- [Flame Spread Index: Building Code Definition](https://harth.build/resources/glossary/flame-spread-index.md)
- [Flammable Finishes: Building Code Definition](https://harth.build/resources/glossary/flammable-finishes.md)
- [Flammable Gas: Building Code Definition](https://harth.build/resources/glossary/flammable-gas.md)
- [Flammable Liquefied Gas: Building Code Definition](https://harth.build/resources/glossary/flammable-liquefied-gas.md)
- [Flammable Liquid: Building Code Definition](https://harth.build/resources/glossary/flammable-liquid.md)
- [Flammable Liquids: Building Code Definition](https://harth.build/resources/glossary/flammable-liquids.md)
- [Flammable Material: Building Code Definition](https://harth.build/resources/glossary/flammable-material.md)
- [Flammable Solid: Building Code Definition](https://harth.build/resources/glossary/flammable-solid.md)
- [Flammable Vapor Area: Building Code Definition](https://harth.build/resources/glossary/flammable-vapor-area.md)
- [Flammable Vapors or Fumes: Building Code Definition](https://harth.build/resources/glossary/flammable-vapors-or-fumes.md)
- [Flash Point: Building Code Definition](https://harth.build/resources/glossary/flash-point.md)
- [Fleet Vehicle Motor Fuel-dispensing Facility: Building Code Definition](https://harth.build/resources/glossary/fleet-vehicle-motor-fuel-dispensing-facility.md)
- [Flight: Building Code Definition](https://harth.build/resources/glossary/flight.md)
- [Float: Building Code Definition](https://harth.build/resources/glossary/float.md)
- [Flood Insurance Rate Map (FIRM): Building Code Definition](https://harth.build/resources/glossary/flood-insurance-rate-map-firm.md)
- [Flood Insurance Study: Building Code Definition](https://harth.build/resources/glossary/flood-insurance-study.md)
- [Flood Level Rim: Building Code Definition](https://harth.build/resources/glossary/flood-level-rim.md)
- [Floodway: Building Code Definition](https://harth.build/resources/glossary/floodway.md)
- [Floor Area, Gross: Building Code Definition](https://harth.build/resources/glossary/floor-area-gross.md)
- [Floor Area, Net: Building Code Definition](https://harth.build/resources/glossary/floor-area-net.md)
- [Floor Drain: Building Code Definition](https://harth.build/resources/glossary/floor-drain.md)
- [Floor Furnace: Building Code Definition](https://harth.build/resources/glossary/floor-furnace.md)
- [Flow Pressure: Building Code Definition](https://harth.build/resources/glossary/flow-pressure.md)
- [Flue: Building Code Definition](https://harth.build/resources/glossary/flue.md)
- [Flue, Appliance: Building Code Definition](https://harth.build/resources/glossary/flue-appliance.md)
- [Flue Collar: Building Code Definition](https://harth.build/resources/glossary/flue-collar.md)
- [Flue Gases: Building Code Definition](https://harth.build/resources/glossary/flue-gases.md)
- [Flue Liner (Lining): Building Code Definition](https://harth.build/resources/glossary/flue-liner-lining.md)
- [Flush Tank: Building Code Definition](https://harth.build/resources/glossary/flush-tank.md)
- [Flush Valve: Building Code Definition](https://harth.build/resources/glossary/flush-valve.md)
- [Flushometer Tank: Building Code Definition](https://harth.build/resources/glossary/flushometer-tank.md)
- [Flushometer Valve: Building Code Definition](https://harth.build/resources/glossary/flushometer-valve.md)
- [Foam-extinguishing System: Building Code Definition](https://harth.build/resources/glossary/foam-extinguishing-system.md)
- [Foam Plastic Insulation: Building Code Definition](https://harth.build/resources/glossary/foam-plastic-insulation.md)
- [Folding and Telescopic Seating: Building Code Definition](https://harth.build/resources/glossary/folding-and-telescopic-seating.md)
- [Foundation Pier: Building Code Definition](https://harth.build/resources/glossary/foundation-pier.md)
- [Fountain: Building Code Definition](https://harth.build/resources/glossary/fountain.md)
- [Frame Structure: Building Code Definition](https://harth.build/resources/glossary/frame-structure.md)
- [Fuel Gas: Building Code Definition](https://harth.build/resources/glossary/fuel-gas.md)
- [Fuel Oil: Building Code Definition](https://harth.build/resources/glossary/fuel-oil.md)
- [Fuel-oil Piping System: Building Code Definition](https://harth.build/resources/glossary/fuel-oil-piping-system.md)
- [Fumigant: Building Code Definition](https://harth.build/resources/glossary/fumigant.md)
- [Furnace: Building Code Definition](https://harth.build/resources/glossary/furnace.md)
- [Furnace Class A: Building Code Definition](https://harth.build/resources/glossary/furnace-class-a.md)
- [Furnace Class D: Building Code Definition](https://harth.build/resources/glossary/furnace-class-d.md)
- [Furnace Room: Building Code Definition](https://harth.build/resources/glossary/furnace-room.md)
- [Fusible Plug: Building Code Definition](https://harth.build/resources/glossary/fusible-plug.md)
- [Gas Cabinet: Building Code Definition](https://harth.build/resources/glossary/gas-cabinet.md)
- [Gas Piping: Building Code Definition](https://harth.build/resources/glossary/gas-piping.md)
- [Gas Room: Building Code Definition](https://harth.build/resources/glossary/gas-room.md)
- [Gaseous Hydrogen System: Building Code Definition](https://harth.build/resources/glossary/gaseous-hydrogen-system.md)
- [Glazing Area: Building Code Definition](https://harth.build/resources/glossary/glazing-area.md)
- [Grade: Building Code Definition](https://harth.build/resources/glossary/grade.md)
- [Grade Floor Opening: Building Code Definition](https://harth.build/resources/glossary/grade-floor-opening.md)
- [Grade Plane: Building Code Definition](https://harth.build/resources/glossary/grade-plane.md)
- [Grandstand: Building Code Definition](https://harth.build/resources/glossary/grandstand.md)
- [Gridded Water Distribution System: Building Code Definition](https://harth.build/resources/glossary/gridded-water-distribution-system.md)
- [Gridiron: Building Code Definition](https://harth.build/resources/glossary/gridiron.md)
- [Gross Leasable Area: Building Code Definition](https://harth.build/resources/glossary/gross-leasable-area.md)
- [Ground-fault Circuit-interrupter: Building Code Definition](https://harth.build/resources/glossary/ground-fault-circuit-interrupter.md)
- [Ground-source Heat Pump Loop System: Building Code Definition](https://harth.build/resources/glossary/ground-source-heat-pump-loop-system.md)
- [Ground Source Heat Pump Loop System: Building Code Definition](https://harth.build/resources/glossary/ground-source-heat-pump-loop-system-code-term.md)
- [Grounded Conductor: Building Code Definition](https://harth.build/resources/glossary/grounded-conductor.md)
- [Grounding Conductor: Building Code Definition](https://harth.build/resources/glossary/grounding-conductor.md)
- [Grounding Electrode: Building Code Definition](https://harth.build/resources/glossary/grounding-electrode.md)
- [Guard: Building Code Definition](https://harth.build/resources/glossary/guard.md)
- [Guarded: Building Code Definition](https://harth.build/resources/glossary/guarded.md)
- [Gypsum Board: Building Code Definition](https://harth.build/resources/glossary/gypsum-board.md)
- [Gypsum Plaster: Building Code Definition](https://harth.build/resources/glossary/gypsum-plaster.md)
- [Gypsum Veneer Plaster: Building Code Definition](https://harth.build/resources/glossary/gypsum-veneer-plaster.md)
- [Habitable Space: Building Code Definition](https://harth.build/resources/glossary/habitable-space.md)
- [Halogenated Extinguishing System: Building Code Definition](https://harth.build/resources/glossary/halogenated-extinguishing-system.md)
- [Handling: Building Code Definition](https://harth.build/resources/glossary/handling.md)
- [Handrail: Building Code Definition](https://harth.build/resources/glossary/handrail.md)
- [Hardboard: Building Code Definition](https://harth.build/resources/glossary/hardboard.md)
- [Hazardous Location: Building Code Definition](https://harth.build/resources/glossary/hazardous-location.md)
- [Hazardous Materials: Building Code Definition](https://harth.build/resources/glossary/hazardous-materials.md)
- [Hazardous Production Material (HPM): Building Code Definition](https://harth.build/resources/glossary/hazardous-production-material-hpm.md)
- [Head Joint: Building Code Definition](https://harth.build/resources/glossary/head-joint.md)
- [Health Hazard: Building Code Definition](https://harth.build/resources/glossary/health-hazard.md)
- [Heat Exchanger: Building Code Definition](https://harth.build/resources/glossary/heat-exchanger.md)
- [Heat Pump: Building Code Definition](https://harth.build/resources/glossary/heat-pump.md)
- [Heat Transfer Liquid: Building Code Definition](https://harth.build/resources/glossary/heat-transfer-liquid.md)
- [Heat Trap: Building Code Definition](https://harth.build/resources/glossary/heat-trap.md)
- [Heated Slab: Building Code Definition](https://harth.build/resources/glossary/heated-slab.md)
- [Heavy-duty Cooking Appliance: Building Code Definition](https://harth.build/resources/glossary/heavy-duty-cooking-appliance.md)
- [Height, Building: Building Code Definition](https://harth.build/resources/glossary/height-building.md)
- [Height, Story: Building Code Definition](https://harth.build/resources/glossary/height-story.md)
- [Helical Pile: Building Code Definition](https://harth.build/resources/glossary/helical-pile.md)
- [Heliport: Building Code Definition](https://harth.build/resources/glossary/heliport.md)
- [Helistop: Building Code Definition](https://harth.build/resources/glossary/helistop.md)
- [High-efficacy Lamps: Building Code Definition](https://harth.build/resources/glossary/high-efficacy-lamps.md)
- [High-piled Combustible Storage: Building Code Definition](https://harth.build/resources/glossary/high-piled-combustible-storage.md)
- [High-piled Storage Area: Building Code Definition](https://harth.build/resources/glossary/high-piled-storage-area.md)
- [High-rise Building: Building Code Definition](https://harth.build/resources/glossary/high-rise-building.md)
- [Highly Toxic: Building Code Definition](https://harth.build/resources/glossary/highly-toxic.md)
- [Highway: Building Code Definition](https://harth.build/resources/glossary/highway.md)
- [Hill: Building Code Definition](https://harth.build/resources/glossary/hill.md)
- [Historic Buildings: Building Code Definition](https://harth.build/resources/glossary/historic-buildings.md)
- [Hood: Building Code Definition](https://harth.build/resources/glossary/hood.md)
- [Horizontal Assembly: Building Code Definition](https://harth.build/resources/glossary/horizontal-assembly.md)
- [Horizontal Branch Drain: Building Code Definition](https://harth.build/resources/glossary/horizontal-branch-drain.md)
- [Horizontal Pipe: Building Code Definition](https://harth.build/resources/glossary/horizontal-pipe.md)
- [Hospitals and Mental Hospitals: Building Code Definition](https://harth.build/resources/glossary/hospitals-and-mental-hospitals.md)
- [Hot Water: Building Code Definition](https://harth.build/resources/glossary/hot-water.md)
- [Hot Work: Building Code Definition](https://harth.build/resources/glossary/hot-work.md)
- [Hot Work Area: Building Code Definition](https://harth.build/resources/glossary/hot-work-area.md)
- [Hot Work Equipment: Building Code Definition](https://harth.build/resources/glossary/hot-work-equipment.md)
- [Hot Work Permits: Building Code Definition](https://harth.build/resources/glossary/hot-work-permits.md)
- [Hot Work Program: Building Code Definition](https://harth.build/resources/glossary/hot-work-program.md)
- [HPM Flammable Liquid: Building Code Definition](https://harth.build/resources/glossary/hpm-flammable-liquid.md)
- [HPM Room: Building Code Definition](https://harth.build/resources/glossary/hpm-room.md)
- [Hurricane-prone Regions: Building Code Definition](https://harth.build/resources/glossary/hurricane-prone-regions.md)
- [Hydrogen Cutoff Room: Building Code Definition](https://harth.build/resources/glossary/hydrogen-cutoff-room.md)
- [Hydrogen Generating Appliance: Building Code Definition](https://harth.build/resources/glossary/hydrogen-generating-appliance.md)
- [Identified: Building Code Definition](https://harth.build/resources/glossary/identified.md)
- [Ignition Source: Building Code Definition](https://harth.build/resources/glossary/ignition-source.md)
- [Immediately Dangerous to Life and Health (IDLH): Building Code Definition](https://harth.build/resources/glossary/immediately-dangerous-to-life-and-health-idlh.md)
- [Immediately Dangerous to Life or Health (IDLH): Building Code Definition](https://harth.build/resources/glossary/immediately-dangerous-to-life-or-health-idlh.md)
- [Impact Load: Building Code Definition](https://harth.build/resources/glossary/impact-load.md)
- [Incompatible Materials: Building Code Definition](https://harth.build/resources/glossary/incompatible-materials.md)
- [Indirect Waste Pipe: Building Code Definition](https://harth.build/resources/glossary/indirect-waste-pipe.md)
- [Individual Sewage Disposal System: Building Code Definition](https://harth.build/resources/glossary/individual-sewage-disposal-system.md)
- [Individual Vent: Building Code Definition](https://harth.build/resources/glossary/individual-vent.md)
- [Individual Water Supply: Building Code Definition](https://harth.build/resources/glossary/individual-water-supply.md)
- [Inert Gas: Building Code Definition](https://harth.build/resources/glossary/inert-gas.md)
- [Infiltration: Building Code Definition](https://harth.build/resources/glossary/infiltration.md)
- [Inhabited Building: Building Code Definition](https://harth.build/resources/glossary/inhabited-building.md)
- [Initiating Device: Building Code Definition](https://harth.build/resources/glossary/initiating-device.md)
- [Inspection Certificate: Building Code Definition](https://harth.build/resources/glossary/inspection-certificate.md)
- [Insulating Sheathing: Building Code Definition](https://harth.build/resources/glossary/insulating-sheathing.md)
- [Interceptor: Building Code Definition](https://harth.build/resources/glossary/interceptor.md)
- [Interior Finish: Building Code Definition](https://harth.build/resources/glossary/interior-finish.md)
- [Interior Floor Finish: Building Code Definition](https://harth.build/resources/glossary/interior-floor-finish.md)
- [Interior Floor-wall Base: Building Code Definition](https://harth.build/resources/glossary/interior-floor-wall-base.md)
- [Interior Surfaces: Building Code Definition](https://harth.build/resources/glossary/interior-surfaces.md)
- [Interior Wall and Ceiling Finish: Building Code Definition](https://harth.build/resources/glossary/interior-wall-and-ceiling-finish.md)
- [Interlock: Building Code Definition](https://harth.build/resources/glossary/interlock.md)
- [Irritant: Building Code Definition](https://harth.build/resources/glossary/irritant.md)
- [Isolated: Building Code Definition](https://harth.build/resources/glossary/isolated.md)
- [Joint: Building Code Definition](https://harth.build/resources/glossary/joint.md)
- [Joint, Flared: Building Code Definition](https://harth.build/resources/glossary/joint-flared.md)
- [Joint, Mechanical: Building Code Definition](https://harth.build/resources/glossary/joint-mechanical.md)
- [Joint, Plastic Adhesive: Building Code Definition](https://harth.build/resources/glossary/joint-plastic-adhesive.md)
- [Joint, Soldered: Building Code Definition](https://harth.build/resources/glossary/joint-soldered.md)
- [Joint, Welded: Building Code Definition](https://harth.build/resources/glossary/joint-welded.md)
- [Jurisdiction: Building Code Definition](https://harth.build/resources/glossary/jurisdiction.md)
- [Key Box: Building Code Definition](https://harth.build/resources/glossary/key-box.md)
- [Kitchen: Building Code Definition](https://harth.build/resources/glossary/kitchen.md)
- [Label: Building Code Definition](https://harth.build/resources/glossary/label.md)
- [Labeled: Building Code Definition](https://harth.build/resources/glossary/labeled.md)
- [Leader: Building Code Definition](https://harth.build/resources/glossary/leader.md)
- [Light-diffusing System: Building Code Definition](https://harth.build/resources/glossary/light-diffusing-system.md)
- [Light-duty Cooking Appliance: Building Code Definition](https://harth.build/resources/glossary/light-duty-cooking-appliance.md)
- [Light-frame Construction: Building Code Definition](https://harth.build/resources/glossary/light-frame-construction.md)
- [Lighting Outlet: Building Code Definition](https://harth.build/resources/glossary/lighting-outlet.md)
- [Limit Control: Building Code Definition](https://harth.build/resources/glossary/limit-control.md)
- [Limited Spraying Space: Building Code Definition](https://harth.build/resources/glossary/limited-spraying-space.md)
- [Liquefied Natural Gas (LNG): Building Code Definition](https://harth.build/resources/glossary/liquefied-natural-gas-lng.md)
- [Liquid: Building Code Definition](https://harth.build/resources/glossary/liquid.md)
- [Liquid Oxygen Ambulatory Container: Building Code Definition](https://harth.build/resources/glossary/liquid-oxygen-ambulatory-container.md)
- [Liquid Oxygen Home Care Container: Building Code Definition](https://harth.build/resources/glossary/liquid-oxygen-home-care-container.md)
- [Liquid Storage Room: Building Code Definition](https://harth.build/resources/glossary/liquid-storage-room.md)
- [Liquid Storage Warehouse: Building Code Definition](https://harth.build/resources/glossary/liquid-storage-warehouse.md)
- [Listed: Building Code Definition](https://harth.build/resources/glossary/listed.md)
- [Live Loads: Building Code Definition](https://harth.build/resources/glossary/live-loads.md)
- [Living Space: Building Code Definition](https://harth.build/resources/glossary/living-space.md)
- [Load and Resistance Factor Design (LRFD): Building Code Definition](https://harth.build/resources/glossary/load-and-resistance-factor-design-lrfd.md)
- [Load Effects: Building Code Definition](https://harth.build/resources/glossary/load-effects.md)
- [Load Factor: Building Code Definition](https://harth.build/resources/glossary/load-factor.md)
- [Loads: Building Code Definition](https://harth.build/resources/glossary/loads.md)
- [Location, Damp: Building Code Definition](https://harth.build/resources/glossary/location-damp.md)
- [Location, Dry: Building Code Definition](https://harth.build/resources/glossary/location-dry.md)
- [Location, Wet: Building Code Definition](https://harth.build/resources/glossary/location-wet.md)
- [Longitudinal Flue Space: Building Code Definition](https://harth.build/resources/glossary/longitudinal-flue-space.md)
- [Lot: Building Code Definition](https://harth.build/resources/glossary/lot.md)
- [Lot Line: Building Code Definition](https://harth.build/resources/glossary/lot-line.md)
- [Low-voltage Lighting: Building Code Definition](https://harth.build/resources/glossary/low-voltage-lighting.md)
- [Lower Flammable Limit (LFL): Building Code Definition](https://harth.build/resources/glossary/lower-flammable-limit-lfl.md)
- [Lowest Floor: Building Code Definition](https://harth.build/resources/glossary/lowest-floor.md)
- [Lp-gas Container: Building Code Definition](https://harth.build/resources/glossary/lp-gas-container.md)
- [Luminaire: Building Code Definition](https://harth.build/resources/glossary/luminaire.md)
- [Macerating Toilet Systems: Building Code Definition](https://harth.build/resources/glossary/macerating-toilet-systems.md)
- [Machinery Room: Building Code Definition](https://harth.build/resources/glossary/machinery-room.md)
- [Main: Building Code Definition](https://harth.build/resources/glossary/main.md)
- [Main Burner: Building Code Definition](https://harth.build/resources/glossary/main-burner.md)
- [Manual: Building Code Definition](https://harth.build/resources/glossary/manual.md)
- [Manual Fire Alarm Box: Building Code Definition](https://harth.build/resources/glossary/manual-fire-alarm-box.md)
- [Manufactured Home: Building Code Definition](https://harth.build/resources/glossary/manufactured-home.md)
- [Manufacturer's Designation: Building Code Definition](https://harth.build/resources/glossary/manufacturer-s-designation.md)
- [Manufacturer's Installation Instructions: Building Code Definition](https://harth.build/resources/glossary/manufacturer-s-installation-instructions.md)
- [Marina: Building Code Definition](https://harth.build/resources/glossary/marina.md)
- [Marine Motor Fuel-dispensing Facility: Building Code Definition](https://harth.build/resources/glossary/marine-motor-fuel-dispensing-facility.md)
- [Mark: Building Code Definition](https://harth.build/resources/glossary/mark.md)
- [Marquee: Building Code Definition](https://harth.build/resources/glossary/marquee.md)
- [Masonry: Building Code Definition](https://harth.build/resources/glossary/masonry.md)
- [Masonry Chimney: Building Code Definition](https://harth.build/resources/glossary/masonry-chimney.md)
- [Masonry Heater: Building Code Definition](https://harth.build/resources/glossary/masonry-heater.md)
- [Masonry, Solid: Building Code Definition](https://harth.build/resources/glossary/masonry-solid.md)
- [Masonry Unit: Building Code Definition](https://harth.build/resources/glossary/masonry-unit.md)
- [Mass Wall: Building Code Definition](https://harth.build/resources/glossary/mass-wall.md)
- [Mastic Fire-resistant Coatings: Building Code Definition](https://harth.build/resources/glossary/mastic-fire-resistant-coatings.md)
- [Material Safety Data Sheet (MSDS): Building Code Definition](https://harth.build/resources/glossary/material-safety-data-sheet-msds.md)
- [Maximum Allowable Quantity Per Control Area: Building Code Definition](https://harth.build/resources/glossary/maximum-allowable-quantity-per-control-area.md)
- [Mean Roof Height: Building Code Definition](https://harth.build/resources/glossary/mean-roof-height.md)
- [Means OF Egress: Building Code Definition](https://harth.build/resources/glossary/means-of-egress.md)
- [Mechanical Draft System: Building Code Definition](https://harth.build/resources/glossary/mechanical-draft-system.md)
- [Mechanical Exhaust System: Building Code Definition](https://harth.build/resources/glossary/mechanical-exhaust-system.md)
- [Mechanical Joint: Building Code Definition](https://harth.build/resources/glossary/mechanical-joint.md)
- [Mechanical System: Building Code Definition](https://harth.build/resources/glossary/mechanical-system.md)
- [Mechanical Systems: Building Code Definition](https://harth.build/resources/glossary/mechanical-systems.md)
- [Medical Gas System: Building Code Definition](https://harth.build/resources/glossary/medical-gas-system.md)
- [Medium-duty Cooking Appliance: Building Code Definition](https://harth.build/resources/glossary/medium-duty-cooking-appliance.md)
- [Membrane Penetration: Building Code Definition](https://harth.build/resources/glossary/membrane-penetration.md)
- [Membrane-penetration Firestop: Building Code Definition](https://harth.build/resources/glossary/membrane-penetration-firestop.md)
- [Membrane Structure: Building Code Definition](https://harth.build/resources/glossary/membrane-structure.md)
- [Merchandise Pad: Building Code Definition](https://harth.build/resources/glossary/merchandise-pad.md)
- [Metal Hydride Storage System: Building Code Definition](https://harth.build/resources/glossary/metal-hydride-storage-system.md)
- [Metal Roof Panel: Building Code Definition](https://harth.build/resources/glossary/metal-roof-panel.md)
- [Metal Roof Shingle: Building Code Definition](https://harth.build/resources/glossary/metal-roof-shingle.md)
- [Meter: Building Code Definition](https://harth.build/resources/glossary/meter.md)
- [Mezzanine: Building Code Definition](https://harth.build/resources/glossary/mezzanine.md)
- [Mineral Fiber: Building Code Definition](https://harth.build/resources/glossary/mineral-fiber.md)
- [Mineral Wool: Building Code Definition](https://harth.build/resources/glossary/mineral-wool.md)
- [Modified Bitumen Roof Covering: Building Code Definition](https://harth.build/resources/glossary/modified-bitumen-roof-covering.md)
- [Modular Boiler: Building Code Definition](https://harth.build/resources/glossary/modular-boiler.md)
- [Mortar: Building Code Definition](https://harth.build/resources/glossary/mortar.md)
- [Mortar, Surface-bonding: Building Code Definition](https://harth.build/resources/glossary/mortar-surface-bonding.md)
- [Multiple-station Alarm Device: Building Code Definition](https://harth.build/resources/glossary/multiple-station-alarm-device.md)
- [Multiple-station Smoke Alarm: Building Code Definition](https://harth.build/resources/glossary/multiple-station-smoke-alarm.md)
- [Nailing, Edge: Building Code Definition](https://harth.build/resources/glossary/nailing-edge.md)
- [Nameplate Horsepower: Building Code Definition](https://harth.build/resources/glossary/nameplate-horsepower.md)
- [Natural Draft System: Building Code Definition](https://harth.build/resources/glossary/natural-draft-system.md)
- [Natural Ventilation: Building Code Definition](https://harth.build/resources/glossary/natural-ventilation.md)
- [Naturally Durable Wood: Building Code Definition](https://harth.build/resources/glossary/naturally-durable-wood.md)
- [Net Occupiable Floor Area: Building Code Definition](https://harth.build/resources/glossary/net-occupiable-floor-area.md)
- [Nominal Size (Lumber): Building Code Definition](https://harth.build/resources/glossary/nominal-size-lumber.md)
- [Noncombustible Material: Building Code Definition](https://harth.build/resources/glossary/noncombustible-material.md)
- [Noncombustible Materials: Building Code Definition](https://harth.build/resources/glossary/noncombustible-materials.md)
- [Nonpotable Water: Building Code Definition](https://harth.build/resources/glossary/nonpotable-water.md)
- [Normal Temperature and Pressure (NTP): Building Code Definition](https://harth.build/resources/glossary/normal-temperature-and-pressure-ntp.md)
- [Nosing: Building Code Definition](https://harth.build/resources/glossary/nosing.md)
- [Nuisance: Building Code Definition](https://harth.build/resources/glossary/nuisance.md)
- [Nuisance Alarm: Building Code Definition](https://harth.build/resources/glossary/nuisance-alarm.md)
- [Nursing Homes: Building Code Definition](https://harth.build/resources/glossary/nursing-homes.md)
- [Occupancy: Building Code Definition](https://harth.build/resources/glossary/occupancy.md)
- [Occupancy Category: Building Code Definition](https://harth.build/resources/glossary/occupancy-category.md)
- [Occupancy Classification: Building Code Definition](https://harth.build/resources/glossary/occupancy-classification.md)
- [Occupant Load: Building Code Definition](https://harth.build/resources/glossary/occupant-load.md)
- [Occupiable Space: Building Code Definition](https://harth.build/resources/glossary/occupiable-space.md)
- [Occupied Space: Building Code Definition](https://harth.build/resources/glossary/occupied-space.md)
- [Offset: Building Code Definition](https://harth.build/resources/glossary/offset.md)
- [Offset (Vent): Building Code Definition](https://harth.build/resources/glossary/offset-vent.md)
- [Open Burning: Building Code Definition](https://harth.build/resources/glossary/open-burning.md)
- [Open Parking Garage: Building Code Definition](https://harth.build/resources/glossary/open-parking-garage.md)
- [Open System: Building Code Definition](https://harth.build/resources/glossary/open-system.md)
- [Operating Building: Building Code Definition](https://harth.build/resources/glossary/operating-building.md)
- [Operating Line: Building Code Definition](https://harth.build/resources/glossary/operating-line.md)
- [Organic Coating: Building Code Definition](https://harth.build/resources/glossary/organic-coating.md)
- [Organic Peroxide: Building Code Definition](https://harth.build/resources/glossary/organic-peroxide.md)
- [Other Structures: Building Code Definition](https://harth.build/resources/glossary/other-structures.md)
- [Outdoor Air: Building Code Definition](https://harth.build/resources/glossary/outdoor-air.md)
- [Outdoor Control Area: Building Code Definition](https://harth.build/resources/glossary/outdoor-control-area.md)
- [Outdoor Opening: Building Code Definition](https://harth.build/resources/glossary/outdoor-opening.md)
- [Outlet: Building Code Definition](https://harth.build/resources/glossary/outlet.md)
- [Overcurrent: Building Code Definition](https://harth.build/resources/glossary/overcurrent.md)
- [Overload: Building Code Definition](https://harth.build/resources/glossary/overload.md)
- [Owner: Building Code Definition](https://harth.build/resources/glossary/owner.md)
- [Oxidizer: Building Code Definition](https://harth.build/resources/glossary/oxidizer.md)
- [Oxidizing Gas: Building Code Definition](https://harth.build/resources/glossary/oxidizing-gas.md)
- [Panel Thickness: Building Code Definition](https://harth.build/resources/glossary/panel-thickness.md)
- [Panelboard: Building Code Definition](https://harth.build/resources/glossary/panelboard.md)
- [Panic Hardware: Building Code Definition](https://harth.build/resources/glossary/panic-hardware.md)
- [Particleboard: Building Code Definition](https://harth.build/resources/glossary/particleboard.md)
- [Pass-through: Building Code Definition](https://harth.build/resources/glossary/pass-through.md)
- [Pellet Fuel-burning Appliance: Building Code Definition](https://harth.build/resources/glossary/pellet-fuel-burning-appliance.md)
- [Pellet Vent: Building Code Definition](https://harth.build/resources/glossary/pellet-vent.md)
- [Penetration Firestop: Building Code Definition](https://harth.build/resources/glossary/penetration-firestop.md)
- [Penthouse: Building Code Definition](https://harth.build/resources/glossary/penthouse.md)
- [Permissible Exposure Limit (PEL): Building Code Definition](https://harth.build/resources/glossary/permissible-exposure-limit-pel.md)
- [Permit: Building Code Definition](https://harth.build/resources/glossary/permit.md)
- [Person: Building Code Definition](https://harth.build/resources/glossary/person.md)
- [Personal Care Service: Building Code Definition](https://harth.build/resources/glossary/personal-care-service.md)
- [Photoluminescent: Building Code Definition](https://harth.build/resources/glossary/photoluminescent.md)
- [Physical Hazard: Building Code Definition](https://harth.build/resources/glossary/physical-hazard.md)
- [Physiological Warning Threshold Level: Building Code Definition](https://harth.build/resources/glossary/physiological-warning-threshold-level.md)
- [Pier: Building Code Definition](https://harth.build/resources/glossary/pier.md)
- [Pilot: Building Code Definition](https://harth.build/resources/glossary/pilot.md)
- [Piping: Building Code Definition](https://harth.build/resources/glossary/piping.md)
- [Piping System: Building Code Definition](https://harth.build/resources/glossary/piping-system.md)
- [Plastic, Approved: Building Code Definition](https://harth.build/resources/glossary/plastic-approved.md)
- [Plastic Glazing: Building Code Definition](https://harth.build/resources/glossary/plastic-glazing.md)
- [Plastic, Thermoplastic: Building Code Definition](https://harth.build/resources/glossary/plastic-thermoplastic.md)
- [Platform: Building Code Definition](https://harth.build/resources/glossary/platform.md)
- [Plenum: Building Code Definition](https://harth.build/resources/glossary/plenum.md)
- [Plosophoric Material: Building Code Definition](https://harth.build/resources/glossary/plosophoric-material.md)
- [Plumbing: Building Code Definition](https://harth.build/resources/glossary/plumbing.md)
- [Plumbing Appliance: Building Code Definition](https://harth.build/resources/glossary/plumbing-appliance.md)
- [Plumbing Appurtenance: Building Code Definition](https://harth.build/resources/glossary/plumbing-appurtenance.md)
- [Plumbing Fixture: Building Code Definition](https://harth.build/resources/glossary/plumbing-fixture.md)
- [Plumbing System: Building Code Definition](https://harth.build/resources/glossary/plumbing-system.md)
- [Point OF Delivery: Building Code Definition](https://harth.build/resources/glossary/point-of-delivery.md)
- [Pollution: Building Code Definition](https://harth.build/resources/glossary/pollution.md)
- [Pool: Building Code Definition](https://harth.build/resources/glossary/pool.md)
- [Portable Fuel Cell Appliance: Building Code Definition](https://harth.build/resources/glossary/portable-fuel-cell-appliance.md)
- [Portable Outdoor Fireplace: Building Code Definition](https://harth.build/resources/glossary/portable-outdoor-fireplace.md)
- [Positive Roof Drainage: Building Code Definition](https://harth.build/resources/glossary/positive-roof-drainage.md)
- [Potable Water: Building Code Definition](https://harth.build/resources/glossary/potable-water.md)
- [Powered Industrial Truck: Building Code Definition](https://harth.build/resources/glossary/powered-industrial-truck.md)
- [Precast Concrete: Building Code Definition](https://harth.build/resources/glossary/precast-concrete.md)
- [Prefabricated Wood I-joist: Building Code Definition](https://harth.build/resources/glossary/prefabricated-wood-i-joist.md)
- [Premises: Building Code Definition](https://harth.build/resources/glossary/premises.md)
- [Premises Wiring (System): Building Code Definition](https://harth.build/resources/glossary/premises-wiring-system.md)
- [Pressure Drop: Building Code Definition](https://harth.build/resources/glossary/pressure-drop.md)
- [Pressure-limiting Device: Building Code Definition](https://harth.build/resources/glossary/pressure-limiting-device.md)
- [Pressure Relief Device: Building Code Definition](https://harth.build/resources/glossary/pressure-relief-device.md)
- [Pressure Relief Valve: Building Code Definition](https://harth.build/resources/glossary/pressure-relief-valve.md)
- [Pressure-relief Valve: Building Code Definition](https://harth.build/resources/glossary/pressure-relief-valve-code-term.md)
- [Pressure Test: Building Code Definition](https://harth.build/resources/glossary/pressure-test.md)
- [Pressure Vessel: Building Code Definition](https://harth.build/resources/glossary/pressure-vessel.md)
- [Pressure Vessels: Building Code Definition](https://harth.build/resources/glossary/pressure-vessels.md)
- [Primary Containment: Building Code Definition](https://harth.build/resources/glossary/primary-containment.md)
- [Primary Function: Building Code Definition](https://harth.build/resources/glossary/primary-function.md)
- [Private: Building Code Definition](https://harth.build/resources/glossary/private.md)
- [Process Transfer: Building Code Definition](https://harth.build/resources/glossary/process-transfer.md)
- [Propellant: Building Code Definition](https://harth.build/resources/glossary/propellant.md)
- [Proposed Design: Building Code Definition](https://harth.build/resources/glossary/proposed-design.md)
- [Public Entrance: Building Code Definition](https://harth.build/resources/glossary/public-entrance.md)
- [Public Sewer: Building Code Definition](https://harth.build/resources/glossary/public-sewer.md)
- [Public Water Main: Building Code Definition](https://harth.build/resources/glossary/public-water-main.md)
- [Public Way: Building Code Definition](https://harth.build/resources/glossary/public-way.md)
- [Purge: Building Code Definition](https://harth.build/resources/glossary/purge.md)
- [Pyrophoric: Building Code Definition](https://harth.build/resources/glossary/pyrophoric.md)
- [Pyrotechnic Composition: Building Code Definition](https://harth.build/resources/glossary/pyrotechnic-composition.md)
- [Pyrotechnic Special Effect: Building Code Definition](https://harth.build/resources/glossary/pyrotechnic-special-effect.md)
- [Pyrotechnic Special-effect Material: Building Code Definition](https://harth.build/resources/glossary/pyrotechnic-special-effect-material.md)
- [Qualified Person: Building Code Definition](https://harth.build/resources/glossary/qualified-person.md)
- [Quantity-distance (Q-D): Building Code Definition](https://harth.build/resources/glossary/quantity-distance-q-d.md)
- [Quick-closing Valve: Building Code Definition](https://harth.build/resources/glossary/quick-closing-valve.md)
- [Raceway: Building Code Definition](https://harth.build/resources/glossary/raceway.md)
- [Radiant Heater: Building Code Definition](https://harth.build/resources/glossary/radiant-heater.md)
- [Ramp: Building Code Definition](https://harth.build/resources/glossary/ramp.md)
- [Readily Accessible: Building Code Definition](https://harth.build/resources/glossary/readily-accessible.md)
- [Ready Access: Building Code Definition](https://harth.build/resources/glossary/ready-access.md)
- [Ready Access (to): Building Code Definition](https://harth.build/resources/glossary/ready-access-to.md)
- [Receptacle: Building Code Definition](https://harth.build/resources/glossary/receptacle.md)
- [Receptacle Outlet: Building Code Definition](https://harth.build/resources/glossary/receptacle-outlet.md)
- [Receptor: Building Code Definition](https://harth.build/resources/glossary/receptor.md)
- [Recirculated Air: Building Code Definition](https://harth.build/resources/glossary/recirculated-air.md)
- [Reclaimed Refrigerants: Building Code Definition](https://harth.build/resources/glossary/reclaimed-refrigerants.md)
- [Record Drawings: Building Code Definition](https://harth.build/resources/glossary/record-drawings.md)
- [Recreational Fire: Building Code Definition](https://harth.build/resources/glossary/recreational-fire.md)
- [Reduced Flow Valve: Building Code Definition](https://harth.build/resources/glossary/reduced-flow-valve.md)
- [Reduced Pressure Principle Backflow Preventer: Building Code Definition](https://harth.build/resources/glossary/reduced-pressure-principle-backflow-preventer.md)
- [Refrigerant: Building Code Definition](https://harth.build/resources/glossary/refrigerant.md)
- [Refrigerant Compressor: Building Code Definition](https://harth.build/resources/glossary/refrigerant-compressor.md)
- [Refrigerant Safety Classifications: Building Code Definition](https://harth.build/resources/glossary/refrigerant-safety-classifications.md)
- [Refrigerated Room or Space: Building Code Definition](https://harth.build/resources/glossary/refrigerated-room-or-space.md)
- [Refrigerating System: Building Code Definition](https://harth.build/resources/glossary/refrigerating-system.md)
- [Refrigeration System: Building Code Definition](https://harth.build/resources/glossary/refrigeration-system.md)
- [Refrigeration System Classification: Building Code Definition](https://harth.build/resources/glossary/refrigeration-system-classification.md)
- [Refrigeration System, Mechanical: Building Code Definition](https://harth.build/resources/glossary/refrigeration-system-mechanical.md)
- [Refrigeration System, Self-contained: Building Code Definition](https://harth.build/resources/glossary/refrigeration-system-self-contained.md)
- [Registered Design Professional: Building Code Definition](https://harth.build/resources/glossary/registered-design-professional.md)
- [Registered Design Professional in Responsible Charge: Building Code Definition](https://harth.build/resources/glossary/registered-design-professional-in-responsible-charge.md)
- [Regulator: Building Code Definition](https://harth.build/resources/glossary/regulator.md)
- [Regulator, Pressure: Building Code Definition](https://harth.build/resources/glossary/regulator-pressure.md)
- [Relief Opening: Building Code Definition](https://harth.build/resources/glossary/relief-opening.md)
- [Relief Valve, Pressure: Building Code Definition](https://harth.build/resources/glossary/relief-valve-pressure.md)
- [Relief Valve, Vacuum: Building Code Definition](https://harth.build/resources/glossary/relief-valve-vacuum.md)
- [Relief Vent: Building Code Definition](https://harth.build/resources/glossary/relief-vent.md)
- [Religious Worship, Place OF: Building Code Definition](https://harth.build/resources/glossary/religious-worship-place-of.md)
- [Remote Solvent Reservoir: Building Code Definition](https://harth.build/resources/glossary/remote-solvent-reservoir.md)
- [Repair: Building Code Definition](https://harth.build/resources/glossary/repair.md)
- [Repair Garage: Building Code Definition](https://harth.build/resources/glossary/repair-garage.md)
- [Reroofing: Building Code Definition](https://harth.build/resources/glossary/reroofing.md)
- [Residential Aircraft Hangar: Building Code Definition](https://harth.build/resources/glossary/residential-aircraft-hangar.md)
- [Residential Building: Building Code Definition](https://harth.build/resources/glossary/residential-building.md)
- [Residential Care/assisted Living Facilities: Building Code Definition](https://harth.build/resources/glossary/residential-care-assisted-living-facilities.md)
- [Resistance Factor: Building Code Definition](https://harth.build/resources/glossary/resistance-factor.md)
- [Responsible Person: Building Code Definition](https://harth.build/resources/glossary/responsible-person.md)
- [Retail Display Area: Building Code Definition](https://harth.build/resources/glossary/retail-display-area.md)
- [Return Air: Building Code Definition](https://harth.build/resources/glossary/return-air.md)
- [Ridge: Building Code Definition](https://harth.build/resources/glossary/ridge.md)
- [Riser: Building Code Definition](https://harth.build/resources/glossary/riser.md)
- [Roll Coating: Building Code Definition](https://harth.build/resources/glossary/roll-coating.md)
- [Roof Assembly: Building Code Definition](https://harth.build/resources/glossary/roof-assembly.md)
- [Roof Covering: Building Code Definition](https://harth.build/resources/glossary/roof-covering.md)
- [Roof Deck: Building Code Definition](https://harth.build/resources/glossary/roof-deck.md)
- [Roof Drain: Building Code Definition](https://harth.build/resources/glossary/roof-drain.md)
- [Roof Recover: Building Code Definition](https://harth.build/resources/glossary/roof-recover.md)
- [Roof Repair: Building Code Definition](https://harth.build/resources/glossary/roof-repair.md)
- [Roof Ventilation: Building Code Definition](https://harth.build/resources/glossary/roof-ventilation.md)
- [Rooftop Structure: Building Code Definition](https://harth.build/resources/glossary/rooftop-structure.md)
- [Room Heater: Building Code Definition](https://harth.build/resources/glossary/room-heater.md)
- [Room Heater, Vented: Building Code Definition](https://harth.build/resources/glossary/room-heater-vented.md)
- [Rough-in: Building Code Definition](https://harth.build/resources/glossary/rough-in.md)
- [Running Bond: Building Code Definition](https://harth.build/resources/glossary/running-bond.md)
- [Safety Can: Building Code Definition](https://harth.build/resources/glossary/safety-can.md)
- [Safety Valve: Building Code Definition](https://harth.build/resources/glossary/safety-valve.md)
- [Sanitary Sewer: Building Code Definition](https://harth.build/resources/glossary/sanitary-sewer.md)
- [Scissor Stair: Building Code Definition](https://harth.build/resources/glossary/scissor-stair.md)
- [Scupper: Building Code Definition](https://harth.build/resources/glossary/scupper.md)
- [Secondary Containment: Building Code Definition](https://harth.build/resources/glossary/secondary-containment.md)
- [Seismic Design Category: Building Code Definition](https://harth.build/resources/glossary/seismic-design-category.md)
- [Seismic-force-resisting System: Building Code Definition](https://harth.build/resources/glossary/seismic-force-resisting-system.md)
- [Self-closing: Building Code Definition](https://harth.build/resources/glossary/self-closing.md)
- [Self-luminous: Building Code Definition](https://harth.build/resources/glossary/self-luminous.md)
- [Semiconductor Fabrication Facility: Building Code Definition](https://harth.build/resources/glossary/semiconductor-fabrication-facility.md)
- [Septic Tank: Building Code Definition](https://harth.build/resources/glossary/septic-tank.md)
- [Service: Building Code Definition](https://harth.build/resources/glossary/service.md)
- [Service Conductors: Building Code Definition](https://harth.build/resources/glossary/service-conductors.md)
- [Service Corridor: Building Code Definition](https://harth.build/resources/glossary/service-corridor.md)
- [Service Entrance: Building Code Definition](https://harth.build/resources/glossary/service-entrance.md)
- [Service Equipment: Building Code Definition](https://harth.build/resources/glossary/service-equipment.md)
- [Service Lateral: Building Code Definition](https://harth.build/resources/glossary/service-lateral.md)
- [Service Water Heating: Building Code Definition](https://harth.build/resources/glossary/service-water-heating.md)
- [Sewage: Building Code Definition](https://harth.build/resources/glossary/sewage.md)
- [Sewage Ejectors: Building Code Definition](https://harth.build/resources/glossary/sewage-ejectors.md)
- [Sewage Pump: Building Code Definition](https://harth.build/resources/glossary/sewage-pump.md)
- [Shaft: Building Code Definition](https://harth.build/resources/glossary/shaft.md)
- [Shaft Enclosure: Building Code Definition](https://harth.build/resources/glossary/shaft-enclosure.md)
- [Shall: Building Code Definition](https://harth.build/resources/glossary/shall.md)
- [Shallow Foundation: Building Code Definition](https://harth.build/resources/glossary/shallow-foundation.md)
- [Shear Wall: Building Code Definition](https://harth.build/resources/glossary/shear-wall.md)
- [Shelf Storage: Building Code Definition](https://harth.build/resources/glossary/shelf-storage.md)
- [Shell: Building Code Definition](https://harth.build/resources/glossary/shell.md)
- [Side Vent: Building Code Definition](https://harth.build/resources/glossary/side-vent.md)
- [Single-ply Membrane: Building Code Definition](https://harth.build/resources/glossary/single-ply-membrane.md)
- [Single-station Smoke Alarm: Building Code Definition](https://harth.build/resources/glossary/single-station-smoke-alarm.md)
- [Site: Building Code Definition](https://harth.build/resources/glossary/site.md)
- [Site Class: Building Code Definition](https://harth.build/resources/glossary/site-class.md)
- [Site-fabricated Stretch System: Building Code Definition](https://harth.build/resources/glossary/site-fabricated-stretch-system.md)
- [Skylight: Building Code Definition](https://harth.build/resources/glossary/skylight.md)
- [Skylight, Unit: Building Code Definition](https://harth.build/resources/glossary/skylight-unit.md)
- [Skylights and Sloped Glazing: Building Code Definition](https://harth.build/resources/glossary/skylights-and-sloped-glazing.md)
- [Sleeping Unit: Building Code Definition](https://harth.build/resources/glossary/sleeping-unit.md)
- [Slip Joint: Building Code Definition](https://harth.build/resources/glossary/slip-joint.md)
- [Slope: Building Code Definition](https://harth.build/resources/glossary/slope.md)
- [Small Arms Primers: Building Code Definition](https://harth.build/resources/glossary/small-arms-primers.md)
- [Smoke Alarm: Building Code Definition](https://harth.build/resources/glossary/smoke-alarm.md)
- [Smoke Barrier: Building Code Definition](https://harth.build/resources/glossary/smoke-barrier.md)
- [Smoke Compartment: Building Code Definition](https://harth.build/resources/glossary/smoke-compartment.md)
- [Smoke Damper: Building Code Definition](https://harth.build/resources/glossary/smoke-damper.md)
- [Smoke Detector: Building Code Definition](https://harth.build/resources/glossary/smoke-detector.md)
- [Smoke-developed Index: Building Code Definition](https://harth.build/resources/glossary/smoke-developed-index.md)
- [Smoke-protected Assembly Seating: Building Code Definition](https://harth.build/resources/glossary/smoke-protected-assembly-seating.md)
- [Smokeproof Enclosure: Building Code Definition](https://harth.build/resources/glossary/smokeproof-enclosure.md)
- [Solar Heat Gain Coefficient (SHGC): Building Code Definition](https://harth.build/resources/glossary/solar-heat-gain-coefficient-shgc.md)
- [Solid: Building Code Definition](https://harth.build/resources/glossary/solid.md)
- [Solid Masonry: Building Code Definition](https://harth.build/resources/glossary/solid-masonry.md)
- [Spa or Hot Tub: Building Code Definition](https://harth.build/resources/glossary/spa-or-hot-tub.md)
- [Special Amusement Building: Building Code Definition](https://harth.build/resources/glossary/special-amusement-building.md)
- [Special Flood Hazard Area: Building Code Definition](https://harth.build/resources/glossary/special-flood-hazard-area.md)
- [Special Industrial Explosive Device: Building Code Definition](https://harth.build/resources/glossary/special-industrial-explosive-device.md)
- [Special Inspection: Building Code Definition](https://harth.build/resources/glossary/special-inspection.md)
- [Special Structural Wall: Building Code Definition](https://harth.build/resources/glossary/special-structural-wall.md)
- [Specific Gravity: Building Code Definition](https://harth.build/resources/glossary/specific-gravity.md)
- [Spillproof Vacuum Breaker: Building Code Definition](https://harth.build/resources/glossary/spillproof-vacuum-breaker.md)
- [Splice: Building Code Definition](https://harth.build/resources/glossary/splice.md)
- [Spline: Building Code Definition](https://harth.build/resources/glossary/spline.md)
- [Spray Booth: Building Code Definition](https://harth.build/resources/glossary/spray-booth.md)
- [Spray Room: Building Code Definition](https://harth.build/resources/glossary/spray-room.md)
- [Sprayed Fire-resistant Materials: Building Code Definition](https://harth.build/resources/glossary/sprayed-fire-resistant-materials.md)
- [Spraying Space: Building Code Definition](https://harth.build/resources/glossary/spraying-space.md)
- [Stack: Building Code Definition](https://harth.build/resources/glossary/stack.md)
- [Stack Bond: Building Code Definition](https://harth.build/resources/glossary/stack-bond.md)
- [Stack Vent: Building Code Definition](https://harth.build/resources/glossary/stack-vent.md)
- [Stack Venting: Building Code Definition](https://harth.build/resources/glossary/stack-venting.md)
- [Stage: Building Code Definition](https://harth.build/resources/glossary/stage.md)
- [Stair: Building Code Definition](https://harth.build/resources/glossary/stair.md)
- [Stairway: Building Code Definition](https://harth.build/resources/glossary/stairway.md)
- [Stairway, Exterior: Building Code Definition](https://harth.build/resources/glossary/stairway-exterior.md)
- [Stairway, Interior: Building Code Definition](https://harth.build/resources/glossary/stairway-interior.md)
- [Stairway, Spiral: Building Code Definition](https://harth.build/resources/glossary/stairway-spiral.md)
- [Standard Reference Design: Building Code Definition](https://harth.build/resources/glossary/standard-reference-design.md)
- [Start OF Construction: Building Code Definition](https://harth.build/resources/glossary/start-of-construction.md)
- [Stationary Fuel Cell Power Plant: Building Code Definition](https://harth.build/resources/glossary/stationary-fuel-cell-power-plant.md)
- [Steel: Building Code Definition](https://harth.build/resources/glossary/steel.md)
- [Steel Construction, Cold-formed: Building Code Definition](https://harth.build/resources/glossary/steel-construction-cold-formed.md)
- [Steel Joist: Building Code Definition](https://harth.build/resources/glossary/steel-joist.md)
- [Steel Member, Structural: Building Code Definition](https://harth.build/resources/glossary/steel-member-structural.md)
- [Sterilizer Vent: Building Code Definition](https://harth.build/resources/glossary/sterilizer-vent.md)
- [Stone Masonry: Building Code Definition](https://harth.build/resources/glossary/stone-masonry.md)
- [Storage, Hazardous Materials: Building Code Definition](https://harth.build/resources/glossary/storage-hazardous-materials.md)
- [Storefront: Building Code Definition](https://harth.build/resources/glossary/storefront.md)
- [Storm Shelter: Building Code Definition](https://harth.build/resources/glossary/storm-shelter.md)
- [Story: Building Code Definition](https://harth.build/resources/glossary/story.md)
- [Story Above Grade Plane: Building Code Definition](https://harth.build/resources/glossary/story-above-grade-plane.md)
- [Strength Design: Building Code Definition](https://harth.build/resources/glossary/strength-design.md)
- [Strength, Nominal: Building Code Definition](https://harth.build/resources/glossary/strength-nominal.md)
- [Strength, Required: Building Code Definition](https://harth.build/resources/glossary/strength-required.md)
- [Structural Composite Lumber: Building Code Definition](https://harth.build/resources/glossary/structural-composite-lumber.md)
- [Structural Glued-laminated Timber: Building Code Definition](https://harth.build/resources/glossary/structural-glued-laminated-timber.md)
- [Structural Insulated Panel (SIP): Building Code Definition](https://harth.build/resources/glossary/structural-insulated-panel-sip.md)
- [Structural Observation: Building Code Definition](https://harth.build/resources/glossary/structural-observation.md)
- [Structure: Building Code Definition](https://harth.build/resources/glossary/structure.md)
- [Subsoil Drain: Building Code Definition](https://harth.build/resources/glossary/subsoil-drain.md)
- [Substantial Damage: Building Code Definition](https://harth.build/resources/glossary/substantial-damage.md)
- [Substantial Improvement: Building Code Definition](https://harth.build/resources/glossary/substantial-improvement.md)
- [Suite: Building Code Definition](https://harth.build/resources/glossary/suite.md)
- [Sump: Building Code Definition](https://harth.build/resources/glossary/sump.md)
- [Sump Pump: Building Code Definition](https://harth.build/resources/glossary/sump-pump.md)
- [Sump Vent: Building Code Definition](https://harth.build/resources/glossary/sump-vent.md)
- [Sunroom: Building Code Definition](https://harth.build/resources/glossary/sunroom.md)
- [Supervising Station: Building Code Definition](https://harth.build/resources/glossary/supervising-station.md)
- [Supervisory Service: Building Code Definition](https://harth.build/resources/glossary/supervisory-service.md)
- [Supervisory Signal: Building Code Definition](https://harth.build/resources/glossary/supervisory-signal.md)
- [Supervisory Signal-initiating Device: Building Code Definition](https://harth.build/resources/glossary/supervisory-signal-initiating-device.md)
- [Supply Air: Building Code Definition](https://harth.build/resources/glossary/supply-air.md)
- [Supply Air System: Building Code Definition](https://harth.build/resources/glossary/supply-air-system.md)
- [Supports: Building Code Definition](https://harth.build/resources/glossary/supports.md)
- [Sweep: Building Code Definition](https://harth.build/resources/glossary/sweep.md)
- [Swimming Pool: Building Code Definition](https://harth.build/resources/glossary/swimming-pool.md)
- [Swimming Pools: Building Code Definition](https://harth.build/resources/glossary/swimming-pools.md)
- [System: Building Code Definition](https://harth.build/resources/glossary/system.md)
- [Tank: Building Code Definition](https://harth.build/resources/glossary/tank.md)
- [Tank, Atmospheric: Building Code Definition](https://harth.build/resources/glossary/tank-atmospheric.md)
- [Tank, Portable: Building Code Definition](https://harth.build/resources/glossary/tank-portable.md)
- [Tank, Primary: Building Code Definition](https://harth.build/resources/glossary/tank-primary.md)
- [Tank, Stationary: Building Code Definition](https://harth.build/resources/glossary/tank-stationary.md)
- [Tank Vehicle: Building Code Definition](https://harth.build/resources/glossary/tank-vehicle.md)
- [Technically Infeasible: Building Code Definition](https://harth.build/resources/glossary/technically-infeasible.md)
- [Temperature-relief Valve: Building Code Definition](https://harth.build/resources/glossary/temperature-relief-valve.md)
- [Tempered Water: Building Code Definition](https://harth.build/resources/glossary/tempered-water.md)
- [Tent: Building Code Definition](https://harth.build/resources/glossary/tent.md)
- [Thermal Insecticidal Fogging: Building Code Definition](https://harth.build/resources/glossary/thermal-insecticidal-fogging.md)
- [Thermal Isolation: Building Code Definition](https://harth.build/resources/glossary/thermal-isolation.md)
- [Thermostat: Building Code Definition](https://harth.build/resources/glossary/thermostat.md)
- [Third-party Certification Agency: Building Code Definition](https://harth.build/resources/glossary/third-party-certification-agency.md)
- [Third-party Certified: Building Code Definition](https://harth.build/resources/glossary/third-party-certified.md)
- [Through Penetration: Building Code Definition](https://harth.build/resources/glossary/through-penetration.md)
- [Through-penetration Firestop System: Building Code Definition](https://harth.build/resources/glossary/through-penetration-firestop-system.md)
- [Tie, Lateral: Building Code Definition](https://harth.build/resources/glossary/tie-lateral.md)
- [Tie, Wall: Building Code Definition](https://harth.build/resources/glossary/tie-wall.md)
- [Tile: Building Code Definition](https://harth.build/resources/glossary/tile.md)
- [Tile, Structural Clay: Building Code Definition](https://harth.build/resources/glossary/tile-structural-clay.md)
- [Tires, Bulk Storage OF: Building Code Definition](https://harth.build/resources/glossary/tires-bulk-storage-of.md)
- [Toilet Room: Building Code Definition](https://harth.build/resources/glossary/toilet-room.md)
- [Tool: Building Code Definition](https://harth.build/resources/glossary/tool.md)
- [Townhouse: Building Code Definition](https://harth.build/resources/glossary/townhouse.md)
- [Toxic: Building Code Definition](https://harth.build/resources/glossary/toxic.md)
- [Transient: Building Code Definition](https://harth.build/resources/glossary/transient.md)
- [Transient Aircraft: Building Code Definition](https://harth.build/resources/glossary/transient-aircraft.md)
- [Transition Fittings, Plastic to Steel: Building Code Definition](https://harth.build/resources/glossary/transition-fittings-plastic-to-steel.md)
- [Transverse Flue Space: Building Code Definition](https://harth.build/resources/glossary/transverse-flue-space.md)
- [Trap: Building Code Definition](https://harth.build/resources/glossary/trap.md)
- [Trap Seal: Building Code Definition](https://harth.build/resources/glossary/trap-seal.md)
- [Treated Wood: Building Code Definition](https://harth.build/resources/glossary/treated-wood.md)
- [Trim: Building Code Definition](https://harth.build/resources/glossary/trim.md)
- [Trouble Signal: Building Code Definition](https://harth.build/resources/glossary/trouble-signal.md)
- [Truss Design Drawing: Building Code Definition](https://harth.build/resources/glossary/truss-design-drawing.md)
- [Tube Trailer: Building Code Definition](https://harth.build/resources/glossary/tube-trailer.md)
- [Type A Unit: Building Code Definition](https://harth.build/resources/glossary/type-a-unit.md)
- [Type B Unit: Building Code Definition](https://harth.build/resources/glossary/type-b-unit.md)
- [Type L Vent: Building Code Definition](https://harth.build/resources/glossary/type-l-vent.md)
- [Unauthorized Discharge: Building Code Definition](https://harth.build/resources/glossary/unauthorized-discharge.md)
- [Underlayment: Building Code Definition](https://harth.build/resources/glossary/underlayment.md)
- [Ungrounded: Building Code Definition](https://harth.build/resources/glossary/ungrounded.md)
- [Unit Heater: Building Code Definition](https://harth.build/resources/glossary/unit-heater.md)
- [Unit Skylight: Building Code Definition](https://harth.build/resources/glossary/unit-skylight.md)
- [Unstable (Reactive) Material: Building Code Definition](https://harth.build/resources/glossary/unstable-reactive-material.md)
- [Unvented Room Heater: Building Code Definition](https://harth.build/resources/glossary/unvented-room-heater.md)
- [Unwanted Fire: Building Code Definition](https://harth.build/resources/glossary/unwanted-fire.md)
- [Use (Material): Building Code Definition](https://harth.build/resources/glossary/use-material.md)
- [Utilization Equipment: Building Code Definition](https://harth.build/resources/glossary/utilization-equipment.md)
- [Vacuum: Building Code Definition](https://harth.build/resources/glossary/vacuum.md)
- [Vacuum Breaker: Building Code Definition](https://harth.build/resources/glossary/vacuum-breaker.md)
- [Vacuum Breakers: Building Code Definition](https://harth.build/resources/glossary/vacuum-breakers.md)
- [Valve: Building Code Definition](https://harth.build/resources/glossary/valve.md)
- [Vapor-permeable Membrane: Building Code Definition](https://harth.build/resources/glossary/vapor-permeable-membrane.md)
- [Vapor Pressure: Building Code Definition](https://harth.build/resources/glossary/vapor-pressure.md)
- [Vapor Retarder Class: Building Code Definition](https://harth.build/resources/glossary/vapor-retarder-class.md)
- [Vehicle Barrier System: Building Code Definition](https://harth.build/resources/glossary/vehicle-barrier-system.md)
- [Veneer: Building Code Definition](https://harth.build/resources/glossary/veneer.md)
- [Vent: Building Code Definition](https://harth.build/resources/glossary/vent.md)
- [Vent Connector: Building Code Definition](https://harth.build/resources/glossary/vent-connector.md)
- [Vent Damper Device, Automatic: Building Code Definition](https://harth.build/resources/glossary/vent-damper-device-automatic.md)
- [Vent Gases: Building Code Definition](https://harth.build/resources/glossary/vent-gases.md)
- [Vent Stack: Building Code Definition](https://harth.build/resources/glossary/vent-stack.md)
- [Vent System: Building Code Definition](https://harth.build/resources/glossary/vent-system.md)
- [Vented Room Heater: Building Code Definition](https://harth.build/resources/glossary/vented-room-heater.md)
- [Vented Wall Furnace: Building Code Definition](https://harth.build/resources/glossary/vented-wall-furnace.md)
- [Ventilated: Building Code Definition](https://harth.build/resources/glossary/ventilated.md)
- [Ventilation: Building Code Definition](https://harth.build/resources/glossary/ventilation.md)
- [Ventilation Air: Building Code Definition](https://harth.build/resources/glossary/ventilation-air.md)
- [Venting: Building Code Definition](https://harth.build/resources/glossary/venting.md)
- [Venting System: Building Code Definition](https://harth.build/resources/glossary/venting-system.md)
- [Vertical Pipe: Building Code Definition](https://harth.build/resources/glossary/vertical-pipe.md)
- [Vessel: Building Code Definition](https://harth.build/resources/glossary/vessel.md)
- [Vinyl Siding: Building Code Definition](https://harth.build/resources/glossary/vinyl-siding.md)
- [Visible Alarm Notification Appliance: Building Code Definition](https://harth.build/resources/glossary/visible-alarm-notification-appliance.md)
- [Voltage, Nominal: Building Code Definition](https://harth.build/resources/glossary/voltage-nominal.md)
- [Walkway, Pedestrian: Building Code Definition](https://harth.build/resources/glossary/walkway-pedestrian.md)
- [Wall: Building Code Definition](https://harth.build/resources/glossary/wall.md)
- [Wall-hung Water Closet: Building Code Definition](https://harth.build/resources/glossary/wall-hung-water-closet.md)
- [Wall, Load-bearing: Building Code Definition](https://harth.build/resources/glossary/wall-load-bearing.md)
- [Wall, Retaining: Building Code Definition](https://harth.build/resources/glossary/wall-retaining.md)
- [Waste: Building Code Definition](https://harth.build/resources/glossary/waste.md)
- [Water-hammer Arrestor: Building Code Definition](https://harth.build/resources/glossary/water-hammer-arrestor.md)
- [Water Heater: Building Code Definition](https://harth.build/resources/glossary/water-heater.md)
- [Water Main: Building Code Definition](https://harth.build/resources/glossary/water-main.md)
- [Water Outlet: Building Code Definition](https://harth.build/resources/glossary/water-outlet.md)
- [Water-reactive Material: Building Code Definition](https://harth.build/resources/glossary/water-reactive-material.md)
- [Water-resistive Barrier: Building Code Definition](https://harth.build/resources/glossary/water-resistive-barrier.md)
- [Water Supply System: Building Code Definition](https://harth.build/resources/glossary/water-supply-system.md)
- [Water-supply System: Building Code Definition](https://harth.build/resources/glossary/water-supply-system-code-term.md)
- [Weatherproof: Building Code Definition](https://harth.build/resources/glossary/weatherproof.md)
- [Web: Building Code Definition](https://harth.build/resources/glossary/web.md)
- [Wet-chemical Extinguishing System: Building Code Definition](https://harth.build/resources/glossary/wet-chemical-extinguishing-system.md)
- [Wet Vent: Building Code Definition](https://harth.build/resources/glossary/wet-vent.md)
- [Wharf: Building Code Definition](https://harth.build/resources/glossary/wharf.md)
- [Wheelchair Space: Building Code Definition](https://harth.build/resources/glossary/wheelchair-space.md)
- [Whirlpool Bathtub: Building Code Definition](https://harth.build/resources/glossary/whirlpool-bathtub.md)
- [Wildfire Risk Area: Building Code Definition](https://harth.build/resources/glossary/wildfire-risk-area.md)
- [Wind-borne Debris Region: Building Code Definition](https://harth.build/resources/glossary/wind-borne-debris-region.md)
- [Wireless Protection System: Building Code Definition](https://harth.build/resources/glossary/wireless-protection-system.md)
- [Wood/plastic Composite: Building Code Definition](https://harth.build/resources/glossary/wood-plastic-composite.md)
- [Wood Structural Panel: Building Code Definition](https://harth.build/resources/glossary/wood-structural-panel.md)
- [Workstation: Building Code Definition](https://harth.build/resources/glossary/workstation.md)
- [Wythe: Building Code Definition](https://harth.build/resources/glossary/wythe.md)
- [Yard: Building Code Definition](https://harth.build/resources/glossary/yard.md)
- [Zone: Building Code Definition](https://harth.build/resources/glossary/zone.md)
- [Zone, Notification: Building Code Definition](https://harth.build/resources/glossary/zone-notification.md)

![Labeled code-term definition diagram: Building Code Glossary](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/glossary/index/diagram-1344.webp)

*Defined terms from the International Building, Residential, Fire, Mechanical, Plumbing and Energy Codes — quoted from the code, compared across codes, and li…*

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