3.1.5.19. Combustible Piping Materials

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3.1.5.19. Combustible Piping Materials

1) Except as permitted by Clause 3.1.5.2.(1)(d) and Sentence (2) and (3), combustible piping and tubing and associated adhesives are permitted to be used in a building required to be of noncombustible construction provided that, except when concealed in a wall or concrete floor slab, they

a) have a flame-spread rating not more than 25, and

b) if used in a building described in Section 3.2.6., have a smoke developed classification not more than 50.

3.1.5.18. Combustible Ducts

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3.1.5.18. Combustible Ducts

1) Except as required by Sentence 3.6.4.3. (1), combustible ducts, including plenums and duct connectors, are permitted to be used in a building required to be of noncombustible construction provided these ducts and duct connectors are used only in horizontal runs.

2) Combustible duct linings, duct coverings, duct insulation, vibration isolation connectors, duct tap, pipe insulation and pipe coverings are permitted to be used in a building required to be noncombustible construction provided they conform to the appropriate requirements of subsection 3.6.5.

3) In a building required to be of noncombustible construction, combustible ducts need not comply with the requirements of Sentence 3.6.5.1.(1) and (2) provided the ducts are

a)part of a duct system conveying only ventilation air, and

b)contained entirely within a dwelling unit.

9.10.13.2. Solid Core Wood Door as a Closure

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9.10.13.2. Solid Core Wood Door as a Closure

1) A 45mm thick solid core wood door is permitted to be used where a minimum fire-protection rating of 20 min is permitted or between a public corridor and a suite provided that the door conforms to CAN/ULC-S113, "Wood Core Doors Meeting the Performance Required by CAN/ULC-S104 for Twenty Minute Fire Rated Closure Assemblies."

2) Doors described in Sentence (1) shall have not more than a 6 mm clearance beneath and not more than 3 mm at the sides and top.

3.1.8.12. Twenty-Minute Closures

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3.1.8.12. Twenty-Minute Closures

1) A door assembly having a fire-protection rating not less than 20 min is permitted to be used as a closure in

a) a fire separation not required to have a fire resistance rating more than 1 h, located between

i) a public corridor ans a suite,

ii) a corridor and adjacent sleeping rooms, or

iii) a corridor and adjacent classrooms, offices and libraries in Group A, Division 2 major occupancies, or

b) a fire separation not required to have a fire-resistance rating more than 45 min, located in a building not more than 3 storeys in building height.

2) The requirements for noncombustible sills and combustible floor coverings in NFPA 80, "Fire Doors and Other Opening Protectives," do not apply to a door described in Sentence (1)

3) A door described in Sentence (1) shall have clearances of not more than 6 mm at the bottom and not more than 3 mm at the sides and top.

3.1.7.3. Exposure Conditions for Rating

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3.1.7.3. Exposure Conditions for Rating

1) Floor, roof and ceiling assemblies shall be rated for exposure to fire on the underside.

2) Firewalls and interior vertical fire separation shall be rated for exposure to fire on each side.

3) Exterior walls shall be rated for exposure to fire from inside the building.

3.1.5.6. Combustible Components in Exterior Walls

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3.1.5.6. Combustible Components in Exterior Walls

1) Combustible components, other than those permitted by Article 3.1.5.5., are permitted to be used in an exterior wall assembly of a building required to be of noncombustible construction, provided

a) the building is

i) not more than 3 storeys in building height, or

ii) sprinklered throughout, and

b) the wall assembly

i) meets the requirements of Clause 3.1.5.5.(1)(b), or

ii) is protected by masonry or concrete cladding not less than 25 mm thick.

Design Key:

1. Combustible components in exterior walls are permitted for a sprinklered noncombustible construction building with masonry or concrete cladding.

2. Combustible components in exterior walls are permitted for a building not more than 3 storeys with masonry or concrete cladding.

This sentence is very helpful if you are struggling for meeting the spatial calculation requirements of noncombustible construction.

3.1.4.8. Exterior Cladding

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3.1.4.8. Exterior Cladding

1) Not less than 90% of the exterior cladding on exterior walls of buildings conforming to Article 3.2.2.50. or 3.2.2.58. shall consist of

a) noncombustible cladding, or

b) a wall assembly that satisfies the criteria of Clause 3.1.5.5.(1)(b)

3.1.10.7. Combustible Projections

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3.1.10.7. Combustible Projections

1) combustible material shall not extend across the end of a firewall but it is permitted to extend across a roof above a firewall that is terminated in conformance with Sentence 3.1.10.3.(2).

2) If buildings are separated by a firewall, combustible projections on the exterior of one building, including balconies, platforms, canopies, eave projections and stairs, that extend outward beyond the end of the firewall, shall not be permitted within 2.4 m of combustible projections and window or door openings of the adjacent building.

3.1.5.11. Combustible Stairs in Dwelling Units

Articles need to know!!! hashtag#stairs 3.1.5.11. Combustible Stairs in Dwelling Units 1) Combustible stairs are permitted in a dwelling unit in a building required to be of noncombustible construction.

3.3.1.23. Obstructions

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3.3.1.23. Obstructions

1) No obstructions shall be permitted in any occupancy that would restrict the width of a normal means of egress from any part of a floor area to less than 750mm unless an alternative means of egress is provided adjacent to, accessible from, plainly visible from the obstructed means of egress.