Part 1Definitions

1 SCOPE

This Part lists the terms which are appearing in all the Parts/Sections of the National Building Code of India, along with their definitions. The terms have been arranged in their alphabetical order. The Part(s)/Section(s) in which these terms are appearing, have been indicated against the terms.

However, some common definitions are reproduced in this Part also, the definitions being placed immediately below the term concerned.

A

A95 — Part 8/Section 5A

Abandoned Sign — Part 10/Section 2

Ability — Part 3

Acceleration — Part 8/Section 5A, Part 8/Section 5B

*Access — Part 3, Part 12

Access Aisle — Part 3

Access Panel — Part 9/Section 1

Access Point — Part 8/Section 6

Accessible Site, Building, Facility or Portions — Part 3

Accessible Route — Part 3

Accessible Toilet — Part 3

Accessory — Part 8/Section 2

Accessory Use — Part 2, Part 3

Any use of the premises subordinate to the principal use and customarily incidental to the principal use.

Accidental Loads — Part 6/Section 6

Accompanying Load — Part 6/Section 6

Action — Part 6/Section 6

Action Effect or Load Effect — Part 6/Section 6

Actual Length — Part 6/Section 6

Adaptive Thermal Comfort — Part 11

Advertising Sign — Part 10/Section 2

*Ageing — Part 3, Part 12

Air Admittance Valve — Part 9/Section 2

Air Break — Part 9/Section 2

Air Change per Hour — Part 8/Section 1

Air Circuit Breaker (ACB) — Part 8/Section 2

Air Conditioning — Part 8/Section 3

Air Gap, Drainage — Part 9/Section 2

Air Gap, Water Distribution — Part 9/Section 1

Air System Balancing — Part 8/Section 3

* Definitions are different.

Air Valve — Part 9/Section 1

Allowable Load — Part 6/Section 2

Alteration — Part 2, Part 3

A change from one type of occupancy to another, or a structural change, such as an addition to the area or height, or the removal of part of a building, or any change to the structure, such as the construction of, cutting into or removal of any wall, partition, column, beam, joist, floor or other support, or a change to or closing of any required means of ingress or egress or a change to the fixtures or equipment.

Alternating Current Variable Voltage (ACVV)

Control — Part 8/Section 5A

Alternating Current Variable Voltage Variable

Frequency (ACVVVF) Control — Part 8/Section 5A

Altitude — Part 8/Section 1

Ambient Noise — Part 8/Section 4

Anaerobic Digestion — Part 9/Section 3

Anchor Pile — Part 6/Section 2

Anchorage Device — Part 6/Section 5B

Angle of Attack — Part 6/Section 1

Angle of Inclination — Part 8/Section 5B

Animated Sign — Part 10/Section 2

Annealed Fire Resistant Glass — Part 6/Section 8

Annealed Glass (see Glass) — Part 6/Section 8

Antenna — Part 8/Section 6

Anti-siphon — Part 9/Section 1

Apparatus — Part 8/Section 2

Appliance — Part 8/Section 2

Appliance Valve — Part 9/Section 4

Approved — Part 2, Part 3, Part 10/Section 2

Approved by the Authority having jurisdiction.

Approved Agency — Part 9/Section 4

Appurtenance — Part 9/Section 1

Area of Rescue Assistance — Part 3

Area of Special Control — Part 10/Section 2

As-built Information — Part 12

As-cut Finished Sizes — Part 6/Section 8

Aspect Ratio — Part 6/Section 8

Assembly Buildings — Part 6/Section 1

PART 1 DEFINITIONS

Asset — Part 12

Asset Life — Part 12

Asset Register — Part 12

Asset Type — Part 12

Asset/Facility Management — Part 12

Assisted Evacuation — Part 3, Part 4

Assistive Product/Device — Part 3

Atmospheric Pressure — Part 8/Section 3

Atrium — Part 4

Attenuation — Part 8/Section 6

Audible Frequency Range — Part 8/Section 4

Authorities Concerned — Part 4

An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for approving or accepting equipment, materials, an installation, or a procedure.

Authority Having Jurisdiction — Part 0, Part 2,

Part 3, Part 6/Section 7A, Part 6/Section 7B,

Part 7, Part 9/Section 1, Part 9/Section 4,

Part 10/Section 2, Part 11

The authority which has been created by a statute and which, for the purpose of administering the Code/Part, may authorize a committee or an official or an agency to act on its behalf; hereinafter called the ‘Authority’.

Authorization — Part 9/Section 3

Automatic Door — Part 3

Automatic Fire Detection and Alarm System — Part 4

Automatic Operation — Part 8/Section 5A

Automatic Rescue Device — Part 8/Section 5A

Automatic Sprinkler System — Part 4

Automatic Water Spray Systems — Part 4

Auxiliary Brake — Part 8/Section 5B

Available Head — Part 9/Section 1

Avenue — Part 10/Section 1

A-Weighted Sound Pressure — Part 8/Section 4

A-Weighted Sound Pressure Level — Part 8/Section 4

Axial Flow Fan — Part 8/Section 1

Axis of Measurement — Part 8/Section 5A

Azimuth — Part 8/Section 1

Backbone — Part 8/Section 6

Backbone Cabling Media Distribution and Building

Pathway — Part 8/Section 6

Back Fill — Part 6/Section 2

Back Pressure Backflow — Part 9/Section 1

Back Siphonage — Part 9/Section 1

Back to Back Cluster — Part 3

Back Up — Part 9/Section 2

Back-up Protection — Part 8/Section 2

Back Water Valve — Part 9/Section 2

Backflow — Part 9/Section 1

Backflow Prevention Device — Part 9/Section 1

Background noise — Part 8/Section 4

Background Noise Correction — Part 8/Section 5B

Balcony — Part 3

Balustrade — Part 6/Section 8, Part 8/Section 5B

Balustrade Decking — Part 8/Section 5B

Bamboo — Part 6/Section 3B

Bamboo Clump — Part 6/Section 3B

Bamboo Culm — Part 6/Section 3B

Bamboo Mat Board — Part 6/Section 3B

Bamboo Mat Corrugated Sheet — Part 6/Section 3B

Bamboo Mat Veneer Composite — Part 6/Section 3B

Band — Part 6/Section 4

Banner — Part 10/Section 2

Banner Sign- Part 10/Section 2

Barrel — Part 9/Section 1

Barrier — Part 8/Section 2

Base — Part 9/Section 1

Basement or Cellar — Part 3

Basic Protection — Part 8/Section 2

Basic Module — Part 6/Section 7A, Part 6/Section 7B

Bath Room Group — Part 9/Section 1, Part 9/Section 2

Bather Load — Part 9/Section 1

Batter Pile (Raker Pile) — Part 6/Section 2

Battery of Fixtures — Part 9/Section 2

Beads or Glazing Beads — Part 6/Section 8

Beam — Part 6/Section 3B, Part 6/Section 6

Beam, Built-Up-Laminated — Part 6/Section 3A

Beam, Glued-Laminated — Part 6/Section 3A

Bearing Capacity, Safe — Part 6/Section 2

Bearing Capacity, Ultimate — Part 6/Section 2

Bearing Pressure, Allowable (Gross or Net) — Part 6/

Section 2

Bearing Type Connection — Part 6/Section 6

Bed Block — Part 6/Section 4

Bed Pan Washer — Part 9/Section 2

Bedding — Part 9/Section 1

Benching — Part 9/Section 2

Benchmarking — Part 12

Biodegradable Waste — Part 12

Biodiversity — Part 11

Bite — Part 6/Section 8

Biodegradable Substance — Part 9/Section 3

Building, Height of — Part 2, Part 3, Part 4

Biomethanation — Part 9/Section 3

Block (Setting Block) — Part 6/Section 8

Bond — Part 6/Section 4

Bonded Member — Part 6/Section 5B

Bonded Post-tensioning — Part 6/Section 5B

Bonding Conductor — Part 8/Section 2

Bonding Ring Conductor (BRC) — Part 8/Section 2

Bored Cast In-situ Pile — Part 6/Section 2

Bored Compaction Pile — Part 6/Section 2

Bored Pile — Part 6/Section 2

Bottom Car Clearance — Part 8/Section 5A

Bottom Car Run-by — Part 8/Section 5A

Bottom Counterweight Run-by — Part 8/Section 5A

Box System — Part 6/Section 4

Braced Member — Part 6/Section 6

Brake Load — Part 8/Section 5B

Branch — Part 9/Section 2

Branch Soil Pipe (BSP) — Part 9/Section 2

Branch Soil Waste Pipe (BSWP) — Part 9/Section 2

Branch Vent Pipe (BVP) — Part 9/Section 2

Branch Waste Pipe (BWP) — Part 9/Section 2

Breadth — Part 6/Section 1

Break-In — Part 8/Section 4

Break-Out — Part 8/Section 4

Breaking Strength — Part 6/Section 3B

Bresummer — Part 6/Section 3A

Briefing — Part 12

Brightness Ratio or Contrast — Part 8/Section 1

Brittle Cladding — Part 6/Section 6

Broad Band Noise — Part 8/Section 4

Buckling Load — Part 6/Section 6

Buckling Strength or Resistance — Part 6/Section 6

*Buffer — Part 8/Section 5A, Part 10/Section 1

Buffer Zone — Part 12

Building — Part 0, Part 2, Part 3, Part 4

Any structure for whatsoever purpose and of whatsoever materials constructed and every part thereof whether used as human habitation or not and includes foundation, plinth, walls, floors, roofs, chimneys, plumbing and building services, fixed platforms, verandah, balcony, cornice or projection, part of a building or anything affixed thereto or any wall enclosing or intended to enclose any land or space and signs and outdoor display structures. Tents/Shamianahs, tarpaulin shelters, etc, erected for temporary and ceremonial occasions with the permission of the Authority shall not be considered as building.

* Definitions are different.

The vertical distance measured, in the case of flat roofs from the average level of the ground around and contiguous to the building or as decided by the Authority to the terrace of last livable floor of the building adjacent to the external walls; and in the case of pitched roofs, up to the point where the external surface of the outer wall intersects the finished surface of the sloping roof, and in the case of gables facing the road, the midpoint between the eaves level and the ridge. Architectural features serving no other function except that of decoration shall be excluded for the purpose of measuring heights.

Building Drain-Combined — Part 9/Section 2

Building Drain-Sanitary — Part 9/Section 2

Building Drain-Storm — Part 9/Section 2

Building Sewer — Part 9/Section 2

Building Sub-Drain — Part 9/Section 2

Building Trap — Part 9/Section 2

Building Energy Simulation (BES) — Part 8/Section 3

Building Environment — Part 11

Building Fabric — Part 12

Building Information Model (BIM) — Part 12

7

Building Integrated Renewable Energy — Part 8/Section 3

Building Line — Part 2, Part 3, Part 10/Section 2

The line up to which the plinth of a building adjoining a street or an extension of a street or on a future street may lawfully extend. It includes the lines prescribed, if any, in any scheme. The building line may change from time to time as decided by the Authority.

Building Maintenance — Part 12

Building Management System (BMS) — Part 8/

Section 3, Part 8/Section 6, Part 12

Building Performance — Part 11

Buildings Related Illnesses (BRI) — Part 8/Section 3

Built-up Section — Part 6/Section 6

Built Environment — Part 11

Bunched — Part 8/Section 2

Bundle-Column — Part 6/Section 3B

Buried Direct — Part 8/Section 2

Bus Bar — Part 8/Section 6

Busbar Trunking System — Part 8/Section 2

Business Buildings — Part 6/Section 1

Business Continuity Management (BCM) — Part 12

Buttress — Part 6/Section 4

Bypass Equipotential Bonding Conductor — Part 8/Section 2

PART 1 DEFINITIONS

Cabin — Part 3

Cable — Part 6/Section 5B, Part 8/Section 2

Cable, Circuit Integrity — Part 8/Section 2

Cable, Flame Retardant (FR) — Part 8/Section 2

Cable, Flame Retardant Low Smoke Halogen Free

(FR-LSH) — Part 8/Section 2

Cable, Flexible — Part 8/Section 2

Cable, Metal-Sheathed — Part 8/Section 2

Cable, PVC Sheathed-Insulated — Part 8/Section 2

Cable, Weatherproof — Part 8/Section 2

Cable, XLPE — Part 8/Section 2

Cable Armoured — Part 8/Section 2

Cable Bracket — Part 8/Section 2

Cable Channel — Part 8/Section 2

Cable Cleat — Part 8/Section 2

Cable Coupler — Part 8/Section 2

Cable Ducting — Part 8/Section 2

Cable Ladder — Part 8/Section 2

Cable Raceways — Part 8/Section 2

Cable Tray — Part 8/Section 2

Cable Trunking — Part 8/Section 2

Cable Tunnel — Part 8/Section 2

Call Indicator — Part 8/Section 5A

Camber — Part 6/Section 6

Candela (cd) — Part 8/Section 1

Canopy — Part 3

Canopy/Tree Canopy — Part 10/Section 1

Canopy Sign — Part 10/Section 2

Car Bodywork — Part 8/Section 5A

Car Door Electric Contact — Part 8/Section 5A

Car Frame — Part 8/Section 5A

Car Platform — Part 8/Section 5A

Car Switch Operation — Part 8/Section 5A

Carbon Emissions — Part 12

Carbon Footprint — Part 12

Cartridge Fuse Link — Part 8/Section 2

Carpet Area — Part 3

Ceiling Rose — Part 8/Section 2

Cell — Part 6/Section 3B

Part 6/Section 7B

Cellular Concrete — Part 6/Section 7A,

Cellulose — Part 6/Section 3B

Central Field — Part 8/Section 1

Centre Internode — Part 6/Section 3B

Centre of Rigidity — Part 6/Section 4

Centrifugal Fan — Part 8/Section 1

Cesspool — Part 9/Section 2

Chair — Part 9/Section 1

Chair Rail — Part 6/Section 8

Channel — Part 9/Section 1

Characteristic Load — Part 6/Section 3B, Part 6/

Section 5B, Part 6/Section 6

Characteristic Strength — Part 6/Section 3B, Part 6/

Section 5B

Characteristic Yield/Ultimate Stress — Part 6/Section 6

Check — Part 6/Section 3A

Chhajja — Part 3

Chimney — Part 3

Chowk or Courtyard — Part 3

Chowk, Inner — Part 3

Chowk, Outer — Part 3

Circuit — Part 8/Section 2

Circuit, Final Sub — Part 8/Section 2

Circuit Breaker — Part 8/Section 2

Circuit Breaker, Linked — Part 8/Section 2

Circuit Integrity Cable Support and Fixing

Materials — Part 8/Section 2

Circulation Path — Part 3

Circulation Space — Part 3

Clay — Part 6/Section 2

Clay, Firm — Part 6/Section 2

Clay, Soft — Part 6/Section 2

Clay, Stiff — Part 6/Section 2

Cleaning — Part 12

Cleaning Eye — Part 9/Section 2

Cleaning Services — Part 12

Clear — Part 3

Clear Design Sky — Part 8/Section 1

Clear Glass — Part 6/Section 8

Clear Waste Water- Part 9/Section 2

Clearance- Part 8/Section 5A

Cleat — Part 8/Section 2

Cleavability — Part 6/Section 3B

Climber (Creeper/Vine) — Part 10/Section 1

Closed Clusters — Part 3

Closed Sign — Part 10/Section 2

Closely-Spaced Modules — Part 6/Section 1

Cluster — Part 3

Cluster Court Town House — Part 3

Cluster Plot — Part 3

Coaxial Cable — Part 8/Section 6

Coincidence Factor — Part 8/Section 2

Collapse — Part 6/Section 3B

Collection — Part 9/Section 3

Collection Chamber — Part 9/Section 2

Colour Contrast — Part 3

Colour Rendering Index (CRI) — Part 8/Section 1

*Column — Part 6/Section 3B, Part 6/Section 6

Column or Strut — Part 6/Section 5B

Column — Part 6/Section 4

Columnar — Part 10/Section 1

Coefficient of Linear Expansion — Part 6/Section 8

Coefficient of Performance, Compressor, Heat

Pump — Part 8/Section 3

Coefficient of Performance, Compressor,

Refrigerating — Part 8/Section 3

Coefficient of Performance (Heat Pump) — Part 8/Section 3

Coefficient of Performance (Refrigerating) — Part 8/Section 3

Comb — Part 8/Section 5B

Comb Lighting — Part 8/Section 5B

Comb Plate — Part 8/Section 5B

Comb Plate Switch — Part 8/Section 5B

Comb Teeth — Part 8/Section 5B

Combination Sign- Part 10/Section 2

Combustible Material — Part 4, Part 6/Section 8, Part 10/Section 2

A material that, in the form in which it is used and under the conditions anticipated, will ignite and burn; a material that does not meet the definition of noncombustible or limited combustible.

Common Path of Travel — Part 4

Common Rafter — Part 6/Section 3B

Communication Pipe — Part 9/Section 1

Compact Section — Part 6/Section 6

Compact Substation or Prefabricated Substation — Part 8/Section 2

Competent Authority — Part 9/Section 4

Competent Maintenance Person — Part 8/Section 5A

Competent Person — Part 12

Component — Part 6/Section 7A, Part 6/Section 7B

Composite Members — Part 6/Section 7A, Part 6/Section 7B

Composite Station — Part 4

Composting — Part 9/Section 3

Compression Wood — Part 6/Section 3A

Computer Aided Facilities Management (CAFM) — Part 12

Computer Aided Maintenance Management System (CMMS) — Part 12

Concrete Grades — Part 6/Section 4

Concourse — Part 4

Condition Monitoring — Part 12

Conductor of a Cable or Core — Part 8/Section 2

Conductor, Aerial — Part 8/Section 2

Conductor, Bare — Part 8/Section 2

Conductor, Earthed — Part 8/Section 2

Conductor, Insulated — Part 8/Section 2

Conduit — Part 8/Section 2

Confined Space — Part 12

Connection — Part 9/Section 2

Connector — Part 8/Section 2

Connector Box or Joint Box — Part 8/Section 2

Connector for Portable Appliances — Part 8/Section 2

Consolidation Point (CP) — Part 8/Section 6

9

Constant Stress Range — Part 6/Section 6

Construction and Demolition Waste — Part 9/Section 3

Construction Equipment — Part 7

*Consumer — Part 9/Section 1, Part 9/Section 2

Consumer's Pipe- Part 9/Section 1

* Definitions are different.

Consumer's Terminals — Part 8/Section 2

Contaminants — Part 8/Section 1

Continuous Operating Voltage $(U_{\mathrm{c}})$ — Part 8/Section 2

Contour — Part 10/Section 1

Contour Interval — Part 10/Section 1

Control — Part 8/Section 5A

Conversion — Part 2

Cooking Alcove — Part 3

Cooling Load — Part 8/Section 3

Cooling Tower — Part 8/Section 3

Cord, Flexible — Part 8/Section 2

Core of a Cable — Part 8/Section 2

Corrective Maintenance — Part 12

Correlated Colour Temperature (CCT) — Part 8/Section 1

Corridor — Part 6/Section 8

Corrosion — Part 6/Section 6

Counterweight — Part 8/Section 5A

Cover — Part 9/Section 1

Covered Area — Part 3, Part 4

Ground area covered by the building immediately above the plinth level. The area covered by the following in the open spaces is excluded from covered area (see Table 2 of Part 4 ‘Fire and Life Safety’ of the Code):

a) Garden, rockery, well and well structures, plant nursery, waterpool, swimming pool (if uncovered), platform round a tree, tank,

* Definitions are different.

PART 1 DEFINITIONS

fountain, bench, Chabutara with open top and unenclosed on sides by walls and the like;

b) Drainage culvert, conduit, catch–pit, gully pit, chamber, gutter and the like;

c) Compound wall, gate, unstoreyed porch and portico, slide, swing, uncovered staircases, ramp areas covered by Chhajja and the like; and

d) Watchman's booth, pumphouse, garbage shaft, electric cabin or sub-stations, and such other utility structures meant for the services of the building under consideration.

NOTE — For the purpose of this part, covered area equals the plot area minus the area due for open spaces in the plot.

Coupled Glazing (Secondary Glazing) — Part 6/Section 8

Crane Load — Part 6/Section 6

Creep — Part 6/Section 5B

Creep Coefficient — Part 6/Section 5B

Crime Prevention through Environmental Design

(CPTED) — Part 12

Critical Activities — Part 12

Critical Asset — Part 12

Critical Damping — Part 6/Section 1

Crookedness — Part 6/Section 3B

Cross Wall — Part 6/Section 3B

Cross-Connect — Part 8/Section 6

Cross-Connection — Part 9/Section 1

Cross-Sectional Area of Masonry Unit — Part 6/Section 4

Cross-Talk — Part 8/Section 4

Crown of Trap — Part 9/Section 2

Crumple Section — Part 6/Section 4

Crush Train Load — Part 4

'Cul-de-Sac' Cluster — Part 3

Cumulative Figure — Part 6/Section 6

Current Carrying Capacity of a Conductor — Part 8/Section 2

Current Using Equipment — Part 8/Section 2

Curtain Wall — Part 6/Section 4, Part 6/Section 8

Curvature — Part 6/Section 3B

Customer's/Consumer's Connection — Part 9/Section 4

Cut-Out — Part 8/Section 2

Cut-Off Level — Part 6/Section 2

Cut-Off Limit — Part 6/Section 6

Damp Situation — Part 8/Section 2

Damping — Part 6/Section 1

Danger — Part 8/Section 2

Daylight Area — Part 8/Section 1

Daylight Factor — Part 8/Section 1

Daylight Penetration — Part 8/Section 1

Deconstruction — Part 12

De-Structured Bamboo — Part 6/Section 3B

Dead — Part 8/Section 2

Dead Knot — Part 6/Section 3A

Dead Loads — Part 6/Section 6

Decay or Rot — Part 6/Section 3A

Decayed Knot — Part 6/Section 3A

Decibel — Part 8/Section 4

Deciduous Tree — Part 10/Section 1

Dedicated Outdoor Air System (DOAS) — Part 8/Section 3

Deep Area — Part 9/Section 1

Deep Manhole — Part 9/Section 2

Deflection — Part 6/Section 6

Deflector Sheave- Part 8/Section 5A

Delamination — Part 6/Section 3B

Deliverable — Part 12

Demand Based Ventilation — Part 8/Section 3

Density — Part 3

Depth — Part 6/Section 1

Depth of Manhole — Part 9/Section 2

Design Acceleration — Part 8/Section 5A

Design Acceleration Spectrum — Part 6/Section 1

Design Current (of a Circuit) — Part 8/Section 2

Design Development — Part 12

Design Horizontal Seismic Coefficient — Part 6/Section 4

*Design Life — Part 6/Section 6, Part 12

Design Load/Factored Load — Part 6/Section 6

Design Pressure Difference — Part 8/Section 3

Design Spectrum — Part 6/Section 6

Design Horizontal Acceleration Coefficient — Part 6/Section 1

Design Horizontal Force — Part 6/Section 1

Detached Building — Part 3

Detail Category — Part 6/Section 6

Developed Height — Part 6/Section 1

Developed Length — Part 9/Section 2

Development — Part 2, Part 3

‘Development’ with grammatical variations means the carrying out of building, engineering, mining or other

* Definitions are different.

operations in, or over, or under land or water, or in the use of any building or land, and includes redevelopment and layout and subdivision of any land; and `to develop' shall be construed accordingly.

Dew Point Temperature — Part 8/Section 3

Diameter — Part 9/Section 2

The nominal internal diameter of pipes and fittings.

Diameter of Knot — Part 6/Section 3A

Diaphragm — Part 6/Section 7A

Diaphragm, Structural — Part 6/Section 3A

Dilution Ventilation — Part 8/Section 1

Direct Contact — Part 8/Section 2

Direct to Home (DTH) — Part 8/Section 6

Direct Earthing System — Part 8/Section 2

Direct Solar Illuminance — Part 8/Section 1

Direct Tap — Part 9/Section 1

Direction Sign — Part 10/Section 2

Disability — Part 3

Disaster — Part 11

Discolouration — Part 6/Section 3A, Part 6/Section 3B

Disconnector — Part 8/Section 2

Discontinuity — Part 6/Section 6

Discrimination (Over-Current Discrimination) — Part 8/Section 2

Disposal — Part 9/Section 3

Distance Piece — Part 6/Section 8

Distance Area or Resistance Area (for an Earth

Electrode only) — Part 8/Section 2

Distribution/Distributing Company — Part 9/Section 4

Diversity Factor — Part 8/Section 2

Diving Pool — Part 9/Section 1

Documented Information — Part 12

Domestic Hazardous Waste — Part 12

Door — Part 8/Section 5A

Door-to-Door Time — Part 8/Section 5A

Door and Shutter Assembly Door-Set — Part 6/Section 8

Door Closer — Part 8/Section 5A

Door Closing Time — Part 8/Section 5A

Door Opening Time — Part 8/Section 5A

Door Operator — Part 8/Section 5A

Door, Centre Opening Sliding — Part 8/Section 5A

Door, Mid-Bar Collapsible — Part 8/Section 5A

Door, Multi-Panel — Part 8/Section 5A

Door, Single Slide — Part 8/Section 5A

Door, Swing — Part 8/Section 5A

Door, Two Speed Siding — Part 8/Section 5A

Door, Vertical Bi-parting — Part 8/Section 5A

Door, Vertical Lifting — Part 8/Section 5A

Double Button (Continuous Pressure) Operation — Part 8/Section 5A

Double Glazed Fire Resistant Glass — Part 6/Section 8

Double Glazing — Part 6/Section 8

Down-Comer — Part 4

Down Take Tap — Part 9/Section 1

Drain — Part 2, Part 3, Part 9/Section 2

A conduit, channel or pipe for the carriage of storm water, sewage, waste water or other water-borne wastes in a building drainage system.

Drain Vent Pipe (DVP) — Part 9/Section 2

*Drainage — Part 2, Part 3, Part 9/Section 2, Part 10/Section 1

Drainage Fixture Unit (DFU) — Part 9/Section 2

Drainage Work — Part 9/Section 2

Driven Cast In-situ Pile — Part 6/Section 2

Drop Connection — Part 9/Section 2

Drop Manhole — Part 9/Section 2

Dry Riser — Part 4

Dry Waste — Part 12

Dry Bulb Temperature — Part 8/Section 1, Part 8/Section 3

Duct — Part 8/Section 2

Ducting — Part 8/Section 2

Duct System — Part 8/Section 3

Ductility — Part 6/Section 1, Part 6/Section 6

Dumb Waiter — Part 8/Section 5A

Dump Sites — Part 12

*Durability — Part 6/Section 6, Part 12

Duration of Load — Part 6/Section 3A

Duress Alarms — Part 12

Dwelling Unit/Tenement — Part 3

Dwellings — Part 6/Section 1