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This page will eventually be filled in with the actual Canadian National Building Code interpretations and or appeal decisions and, as seen below, they will be stored by the name of the code referrence for quicker searching. The links are being compiled and will be added gradually over time. Until they are all added below you can go directly to the individual "Provincial Interpretation Web Sites" link where you will find links to interpretations or appeals.

Most current file added - 2006 code interpretations, file 43.pdf, January 6, 2021

Interpretation Committee Qualifications in BC

Building Code Reference Number is Listed First.  

NOT COMPLETED YET; Hundreds more to come

A- Existing building renovations and code application (Based on 1995 NBC) Building area when no exterior walls. (Based on 1995 NBC) Are basement patio depressions exempt from being a storey. (Based on 1995 NBC) Roles of Registered Professionals, Part 9 Verus Part 3 or 4. (Based on 1995 NBC) American Designs Acceptable (Based on 1995 NBC) Do the FRR requirements between suites override the floor FRR listed in 3.2.2.  (Based on 1995 NBC) Is a smoke barrier required between suites of business and personal occupancies. (Based on 1995 NBC) Caretaker suite in an F2 occupancy.  (Based on 2005 NBC) Can ABS pipe be used for an exposed P trap in a required noncombustible building. (Based on 1995 NBC) Steel building verticle fire separation continuity (Based on 1995 NBC) Can wood members penetrate a fire separation assembly. (Based on 2005 NBC) Continuity of vertical fire separations through an attic or other concealed space. (Based on 2005 NBC) Fire stopping of scissor stairs (Based on 1995 NBC) Tightly fitted as fire stop method (Based on 1995 NBC) Is a fire stop system required around a fire damper. (Based on 1995 NBC) Can electrical cables, grouped or not, penetrate a fire separation and connect to an electrical panel.  (Based on 2005 NBC) Is a combustible WC pipe required to have fire stopping if it penetrates a fire separation floor system. (Based on 2005 NBC) Can combustible trap arms be used on one side of fire separation wall in combustible or noncombustible buildings.  (Based on 1995 NBC) Combustible projections across a firewall. (Based on 2005 NBC) Is fire blocking reguired for pipe penetraitons of interior walls when no floor rating is required. (Based on 1995 NBC) Are the FSR derived from ASTM E 84 acceptable for use in Canada instead of CAN/ULC-S102 of movable partitions (Based on 1995 NBC) & Are FSR's of interior finishes exempted in all sprinklered high buildings. (Based on 1995 NBC) How many 10% mezzanines are permitted in one building (Based on 1995 NBC) (a) and (b) Can a mezzanine be in the middle of a room (Based on 2006 BCBC) Are windows permitted to allow visual openness on a mezzanine. (Based on 1995 NBC) (a) Centrally located mezzanine.  (Based on 2005 NBC) Agregate area of mezzanines (Based on 1995 NBC) Can a basement be considered a separate building when it is not a storage garage. (Based on 1995 NBC) Construction of floor and roof projections (Based on 1995 NBC) FRR of stairs (Based on 1995 NBC) Closures in wall with less than 1.2 meter limiting distance. (Based on 1995 NBC) If there are unprotected openings other than windows, does this sentence still apply.  (Based on 1995 NBC) Is a fabric canopy acceptable on a noncombustible building (Based on 1995 NBC) Does a townhouse that is sprinklered and not required to be sprinklered still need a fire alarm system (Based on 1995 NBC) Is a dedicate phone line required for fire alarm monitoring (Based on 1995 NBC) How is elevator recal to be activated (Based on 1995 NBC) Distance to street or lane does not apply to buildings 600 m2 or less (Based on 1995 NBC) Aircraft hanger sprinkler systems. (Based on 1995 NBC) Can NFPA 13R be used in 4 storey building that has addtional occupancies that are not residential. (Based on 1995 NBC) Water supply to sprinklers when 9 heads or less (Based on 1995 NBC) Where are fast response sprinker heads required (Based on 1995 NBC) Can a fire fighters elevator in a high building open into any floor area. (Based on 1995 NBC) Is emergency power required for a fan in a vesitbule. (Based on 1995 NBC)

3.2.8. If mezzanine is storey for building height is vertical fire separation required (Based on 1995 NBC) Can 2 interconnected storeys both have mezzanines. (Based on 1995 NBC) Is an open stair case serving an interconnected floor space an exit (Based on 1995 NBC) Distance between door and wall in a vestibule. (Based on 1995 NBC) to (4) Egress requirements.  (Based on 2005 NBC) Is a hinged skylight acceptable as a means of egress from a roof top occupancy in a dwelling unit.  (Based on 2005 NBC) Suite requiring 2 exits; can one open into exit stair shaft. (Based on 1995 NBC) Public corridors and exits. (Based on 1995 NBC) When corridor fire FRR is not required (Based on 1995 NBC) Width of egress doors (Based on 1995 NBC) Rise and run of stairs not used as exits (Based on 1995 NBC) (b) Clear and level areas at doors.  (Based on 2005 NBC) Requirements for stairs not serving as exits.  (Based on 2005 NBC) Are guardrails needed on stairs at front of stage (Based on 1995 NBC) Are guards required on roof top occupancy if set back from edge (Based on 1995 NBC) Are guardrails required to be raised when near a raised hot tub surface or rim. (Based on 2005 NBC) B3 individual suite fire separations and FRR, (Based on 2010 NBC) Can a storage garage vestibule be located above the storage garage storey.  (Based on 1995 NBC) Can an elevator lobby be used as a vestibule in a storage garage.  (Based on 2005 NBC) Dwelling unit to garage fire separation (Based on 1995 NBC) Are handrails on both sides of a stairwell required to be continuous across a landing.  (Based on 2005 NBC) Is an open stair case considered to be an exit (Based on 1995 NBC) Mezzanine travel distance to top of stairs (Based on 1995 NBC) Travel distance between exits and 1/3 rule for placement of fire separation (Based on 1995 NBC) Exit exposure to stairs.  (Based on 2005 NBC) Width of exit doors (Based on 1995 NBC) (a) Exterior exit passageway.  (Based on 2006 BCBC) Can any door open into an exit. (Based on 1995 NBC) Can sprinkler piping penetrate an exit enclosure even when it does not serve that exit.  (Based on 1995 NBC) Penetrations of scissor stair exits (Based on 1995 NBC) Can a computer server room open into an exit (Based on 1995 NBC) Is there a coefficient of friction for slip resistance in the code (Based on 1995 NBC) Do handrails on both sides of stairs need to be continuous. (Based on 2006 BCBC) What constitutes a "flight" of stairs (Based on 1995 NBC) Are stairs that have straight and curved runs acceptable as unifrom treads (Based on 1995 NBC) Reduction of required exit stair width.  (Based on 1995 NBC)

3.6.2. Fire separations around service room in a storage garage. (Based on 1995 NBC) to (8) Is fire separation reuired for sevvice room with fire system components in it. (Based on 2006 BCBC) (a) FSR and SDC of fire stop systems installed within a plenum. (Based on 2005 NBC) Windows for light requirements. (Based on 1995 NBC) If more than one universal toilet room is provided can the occupant load still be reduced by 10. (Based on 2005 NBC) Can chemical toilet be used when pipe potable water exists in a building.  (Based on 1995 NBC) Clearance around outside of toilet compartment to fixtures (Based on 1995 NBC) Do water closets in patients room need to be designed as barrier-free (Based on 1995 NBC)     BC only. Are HC elevators required to be connected to generator (Based on 1998 BCBC) When are ramps required within a building (Based on 1995 NBC)

3.8.4. Exemption for elevator in barrier-free access (BC only) Part 4 companion loads. (Based on 2005 NBC)

4.3.1. Design standard for wood joist support of garage floor in a house (Based on 1995 NBC) Which standard should be used for a commercial heating and ventilating system. (Based on 2005 NBC) NFPA 96 range hood requirements for 2 hour FRR versus conflicting ratings for vertical fire separations.  (Based on 2005 NBC) Ventilaiton in heated crawlspace, Part 3 and Part 9 (Based on 1995 NBC) Is a 1 hour fire separation always requied at a construction site where the building is occupied during construction.  (Based on 2005 NBC) Height of rooms below grade or not mentioned in Table (Based on 1995 NBC) Is there a conflict between required opeing sections of windows and restricted opening sizes (Based on 1995 NBC) Openings in widows less than 450 mm off floor. (Based on 1995 NBC) Stairs in landscaped areas away from a building. (Based on 1995 NBC) Stairs in garage, are they interior or exterior stairs. (Based on 1995 NBC) How is "adjacent surface" determined. (Based on 1995 NBC) Climable guards (based on 2006 BCBC) If open stair rises exist are triangle openings larger than 100mm at sides of stairs then permitted (Based on 1995 NBC) Exterior exit passagway (Based on 2006 BCBC) Dwelling door on vertical axis. (Based on 2006 BCBC) Can combustible vacuum piping be fire stopped in the same manner as combustible plumbing pipes. (Based on 2005 NBC) Fire separations around sleeping rooms in a boarding house. (Based on 1995 NBC) Can a washer and dryer be located in a storage garage.  (Based on 2005 NBC) Can a washer and dryer be located in a storage garage. (Based on 2006 BCBC) Service Room fire separation in building not more than 400 m2 (Based on 1995 NBC) and (2). If there are no openings within 1.2 meters, or an opening in one wall only, do these sentences apply.  (Based on 1995 NBC) & Is it only glazed openings that are governed by these sentences. (Based on 1995 NBC) Protection of foam plastic in crawlspace (Based on 1995 NBC) Smoke alarms in dwelling units. (Based on 1995 NBC)

9.10.21. Do the clearance around Part 9 appliances apply to a Part 3 building.  (Based on 1995 NBC) Is soil gas control required in all areas of Canada. (Based on 1995 NBC) Foundation drain tile when slab is above exterior grade. (Based on 1995 NBC) Is an RP required for a lintel in a flat insulated concrete foundation opening.  (Based on 2005 NBC) Does a slab supported by a foundation need to be desgined to Part 4.  (Based on 1995 NBC) Flame spread of materials in crawlspace (Based on 1995 NBC)

9.20.17.(3) and (4) Is a P. Eng needed for lintels in ICF (Based on 2006 BCBC) Do bottom plates of interior walls placed on concrete slab require protection from concrete (Based on 1995 NBC)

9.23.10.(1) Unsupported lateral height of walls. (Based on 1995 NBC) BC only. Where can insulation thickness be reduced (Based on 1998 BCBC) Can poystyrene insulation be used under a concrete slab. (Based on 1998 BCBC) Ground clearance to cladding (Based on 1995 NBC) (a) Can 10 mm material be applied on top of wall sheathing, and not over a stud, and be accpeted as the capilliary break. (Based on 2005 NBC) Is caulking needed for vinyl siding J mold joints to door and window trim. (Based on 1995 NBC) Clearance to ground with stucco (Based on 1995 NBC) Are wood windows allowed on a required waterproof/water resistant wall (Based on 1995NBC) Can chemical toilet be used when a pipe poptable water supply exists in a building.  (Based on 1995 NBC)

9.32. Ventilaiton in heated crawlspace, Part 3 and Part 9 (Based on 1995 NBC)

9.34.1. Do the clearance around Part 9 appliances apply to a Part 3 building.  (Based on 1995 NBC)

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