3.1.5. Noncombustible Construction

3.1.5. Noncombustible Construction
3.1.5.1. Noncombustible Materials
(See Note A-3.1.4.1.(1).)
  1. 1) Except as permitted by Sentences (2) to (4) and Articles 3.1.5.2. to 3.1.5.24., 3.1.13.4. and 3.2.2.16., a building or part of a building required to be of noncombustible construction shall be constructed with noncombustible materials. (See also Subsection 3.1.13. for the requirements regarding the flame-spread rating of interior finishes.)
  2. Notwithstanding the definition of noncombustible materials stated in Article 1.4.1.2. of Division A, a material is permitted to be used in noncombustible construction provided that, when tested in accordance with ULC-S135, "Test Method for the Determination of Combustibility Parameters of Building Materials Using an Oxygen Consumption Calorimeter (Cone Calorimeter)," at a heat flux of 50 kW/m2,
    1. its average total heat release is not more than 3 MJ/m2,
    2. its average total smoke extinction area is not more than 1.0 m2, and
    3. the test duration is extended beyond the time stipulated in the referenced standard until it is clear that there is no further release of heat or smoke.
  3. If a material referred to in Sentence (2) consists of a number of discrete layers and testing reveals that the surface layer or layers protect the underlying layers such that complete combustion of the underlying layers does not occur, the test shall be repeated by removing the outer layers sequentially until all layers have been exposed during testing, or until complete combustion has occurred.
  4. The acceptance criteria for a material tested in accordance with Sentence (3) shall be based on the cumulative emissions from all layers, which must not exceed the criteria stated in Clauses (2)(a) and (b).
3.1.5.2. Minor Combustible Components
  1. The following minor combustible components are permitted in a building required to be of noncombustible construction:
    1. paint (see also Clause 3.1.13.1.(2)(b)),
    2. self-adhesive tapes, mastics and caulking materials, including foamed plastic air sealants, applied to provide a seal between the major components of exterior wall construction, (see also Article 3.6.4.3. for limits on the use of combustible materials in plenum spaces),
    3. fire stops and fire blocks conforming to Sentence 3.1.9.1.(1) and Article 3.1.11.7.,
    4. tubing for pneumatic controls provided it has an outside diameter of not more than 10 mm,
    5. adhesives, vapour barriers and sheathing papers,
    6. electrical outlet and junction boxes,
    7. wood blocking within wall assemblies intended for the attachment of handrails, fixtures, and similar items mounted on the surface of the wall, and
    8. similar minor components.
3.1.5.3. Combustible Roofing Materials
  1. Combustible roof covering that has an A, B, or C classification determined in conformance with Subsection 3.1.15. is permitted on a building required to be of noncombustible construction.
  2. Combustible roof sheathing and roof sheathing supports installed above a concrete deck are permitted on a building required to be of noncombustible construction provided
    1. the concrete deck is not less than 50 mm thick,
    2. the height of the roof space above the deck is not more than 1 m,
    3. the roof space is divided into compartments by fire blocks in conformance with Article 3.1.11.5.,
    4. openings through the concrete deck other than for noncombustible roof drains and plumbing piping are protected by masonry or concrete shafts
      1. constructed as fire separations having a fire-resistance rating not less than 1 h, and
      2. extending from the concrete deck to not less than 150 mm above the adjacent roof sheathing,
    5. the perimeter of the roof is protected by a noncombustible parapet extending from the concrete deck to not less than 150 mm above the adjacent sheathing, and
    6. except as permitted by Clause (d), the roof space does not contain any building services.
  3. Combustible cant strips, roof curbs, nailing strips and similar components used in the installation of roofing are permitted on a building required to be of noncombustible construction.
  4. Wood nailer facings to parapets, not more than 600 mm high, are permitted on a building required to be of noncombustible construction, if the facings and any roof membranes covering the facings are protected by sheet metal.
3.1.5.4. Combustible Glazing and Skylights
  1. Combustible skylight assemblies are permitted in a building required to be of noncombustible construction if the assemblies have a flame-spread rating not more than
    1. 150 provided the assemblies
      1. have an individual area not more than 9 m2,
      2. have an aggregate horizontal projected area of the openings through the ceiling not more than 25% of the area of the ceiling of the room or space in which they are located, and
      3. are spaced not less than 2.5 m from adjacent assemblies and from required fire separations, or
    2. 75 provided the assemblies
      1. have an individual area not more than 27 m2,
      2. have an aggregate horizontal projected area of the openings through the ceiling not more than 33% of the area of the ceiling of the room or space in which they are located, and
      3. are spaced not less than 1.2 m from adjacent assemblies and from required fire separations.
        (See Note A-3.1.5.4.(1).)
  2. Combustible vertical glazing installed no higher than the second storey is permitted in a building required to be of noncombustible construction.
  3. Except as permitted by Sentence (4), the combustible vertical glazing permitted by Sentence (2) shall have a flame-spread rating not more than 75.
  4. The flame-spread rating of combustible glazing is permitted to be not more than 150 if the aggregate area of glazing is not more than 25% of the wall area of the storey in which it is located, and
    1. the glazing is installed in a building not more than 1 storey in building height,
    2. the glazing in the first storey is separated from the glazing in the second storey in accordance with the requirements of Article 3.2.3.17. for opening protection, or
    3. the building is sprinklered throughout.
  5. Combustible window sashes and frames are permitted in a building required to be of noncombustible construction provided
    1. each window in an exterior wall face is an individual unit separated by noncombustible wall construction from every other opening in the wall,
    2. windows in exterior walls in contiguous storeys are separated by not less than 1 m of noncombustible construction, and
    3. the aggregate area of openings in an exterior wall face of a fire compartment is not more than 40% of the area of the wall face.
3.1.5.5. Combustible Cladding on Exterior Walls
  1. Except as provided in Sentences (2) and (3), combustible cladding is permitted to be used on an exterior wall assembly in a building required to be of noncombustible construction, provided
    1. the building is
      1. not more than 3 storeys in building height, or
      2. sprinklered throughout, and
    2. when tested in accordance with CAN/ULC-S134, "Fire Test of Exterior Wall Assemblies," the wall assembly satisfies the following criteria for testing and conditions of acceptance (see Note A-3.1.5.5.(1)(b)):
      1. flaming on or in the wall assembly does not spread more than 5 m above the opening (see Note A-3.1.5.5.(1)(b)(i)),
        and
      2. the heat flux during the flame exposure on the wall assembly is not more than 35 kW/m2 measured at 3.5 m above the opening (see Note A-3.1.5.5.(1)(b)(ii)).
  2. Except as permitted by Articles 3.2.3.10. and 3.2.3.11., where the limiting distance in Tables 3.2.3.1.-B to 3.2.3.1.-E permits an area of unprotected openings of not more than 10% of the exposing building face, the construction requirements of Table 3.2.3.7. shall be met.
  3. A wall assembly permitted by Sentence (1) that includes combustible cladding of fire-retardant-treated wood shall be tested for fire exposure after the cladding has been subjected to an accelerated weathering test as specified in ASTM D 2898, "Accelerated Weathering of Fire-Retardant-Treated Wood for Fire Testing."
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
    1. the building is
      1. not more than 3 storeys in building height, or
      2. sprinklered throughout, and
    2. the wall assembly
      1. meets the requirements of Clause 3.1.5.5.(1)(b), or
      2. is protected by masonry or concrete cladding not less than 25 mm thick (see Note A-3.1.5.5.(1)(b)).
3.1.5.7. Factory-Assembled Panels
  1. Except as provided in Sentence (2), factory-assembled wall and ceiling panels containing foamed plastic insulation with a flame-spread rating not more than 500 are permitted to be used in a building required to be of noncombustible construction, provided
    1. the building
      1. is sprinklered,
      2. is not more than 18 m high, measured from grade to the underside of the roof, and
      3. does not contain a Group A, Group B, or Group C major occupancy, and
    2. the panels
      1. do not contain an air space,
      2. when tested in accordance with CAN/ULC-S138, "Test for Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration," meet the criteria defined therein, and
      3. when a sample panel with an assembled joint typical of field installation is subjected to the applicable test described in Subsection 3.1.12., have a flame-spread rating not more than that permitted for the room or space that they bound.
  2. Factory-assembled exterior wall panels containing thermosetting foamed plastic insulation are permitted to be used in a building required to be of noncombustible construction, provided
    1. the building
      1. is not more than 18 m high, measured from grade to the underside of the roof, and
      2. does not contain a Group B or Group C major occupancy, and
    2. the wall panels
      1. do not contain an air space,
      2. are protected on both sides by sheet steel not less than 0.38 mm thick,
      3. remain in place for not less than 10 min when tested in conformance with CAN/ULC-S101, "Fire Endurance Tests of Building Construction andMaterials," where the exposed surface includes typical vertical and horizontal joints, and
      4. when a sample panel with an assembled joint typical of field installation is subjected to the applicable test described in Subsection 3.1.12., have a flame-spread rating not more than that permitted for the room or space that they bound.
  3. A walk-in cooler or freezer consisting of factory-assembled wall, floor or ceiling panels containing foamed plastic insulation with a flame-spread rating not more than 500 is permitted to be used in a building required to be of noncombustible construction, provided
    1. the building is sprinklered, and
    2. the panels
      1. are protected on both sides by sheet metal not less than 0.38 mm thick with a melting point not less than 650°C,
      2. do not contain an air space,
      3. when tested in accordance with CAN/ULC-S138, "Test for Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration," meet the criteria defined therein, and
      4. when a sample panel with an assembled joint typical of field installation is subjected to the applicable test described in Subsection 3.1.12., have a flame-spread rating not more than that permitted for the space in which they are located or the space that they bound, as applicable.
        (See Note A-3.1.4.2.(2) and 3.1.5.7.(3).)
3.1.5.8. Nailing Elements
  1. Wood nailing elements attached directly to or set into a continuous noncombustible backing for the attachment of interior finishes are permitted in a building required to be of noncombustible construction provided the concealed space created by the wood elements is not more than 50 mm thick.
3.1.5.9. Combustible Millwork
  1. Combustible millwork, including interior trim, doors and door frames, show windows together with their frames, aprons and backing, handrails, shelves, cabinets and counters, is permitted in a building required to be of noncombustible construction.
3.1.5.10. Combustible Flooring Elements
  1. Combustible stage flooring supported on noncombustible structural members is permitted in a building required to be of noncombustible construction.
  2. Wood members more than 50 mm but not more than 300 mm high applied directly to or set into a noncombustible floor slab are permitted for the construction of a raised platform in a building required to be of noncombustible construction provided the concealed spaces created are divided into compartments by fire blocks in conformance with Sentence 3.1.11.3.(2).
  3. The floor system for the raised platform referred to in Sentence (2) is permitted to include a combustible subfloor and combustible finished flooring.
  4. Combustible finished flooring is permitted in a building required to be of noncombustible construction.
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.
3.1.5.12. Combustible Interior Finishes
  1. Except as permitted in Sentences (2) and (3), combustible interior wall and ceiling finishes referred to in Clause 3.1.13.1.(2)(b) that are not more than 1 mm thick are permitted in a building required to be of noncombustible construction.
  2. Combustible interior wall finishes, other than foamed plastics, that are not more than 25 mm thick are permitted in a building required to be of noncombustible construction, provided they have a flame-spread rating not more than 150 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction.
  3. Except as provided in Sentence (4), combustible interior ceiling finishes, other than foamed plastics, that are not more than 25 mm thick are permitted in a building required to be of noncombustible construction, provided they have a flame-spread rating not more than 25 on any exposed surface or on any surface that would be exposed by cutting through the material in any direction, except that not more than 10% of the ceiling area within each fire compartment is permitted to have a flame-spread rating not more than 150.
  4. Combustible interior ceiling finishes made of fire-retardant-treated wood are permitted in a building required to be of noncombustible construction, provided they are not more than 25 mm thick or are exposed fire-retardant-treated wood battens.
3.1.5.13. Gypsum Board
  1. Gypsum board with a tightly adhering paper covering not more than 1 mm thick is permitted in a building required to be of noncombustible construction provided the flame-spread rating on the surface is not more than 25.
3.1.5.14. Combustible Insulation
(See Notes A-3.1.4.2. and A-3.1.4.2.(1).)
  1. Foamed plastic insulation shall conform to Article 3.1.5.15.
  2. Combustible insulation with a flame-spread rating not more than 25 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in a building required to be of noncombustible construction.
  3. Combustible insulation is permitted to be installed above roof decks, outside of foundation walls below ground level, and beneath concrete slabs-on-ground of buildings required to be of noncombustible construction.
  4. Except as provided in Sentences (5) and (6), combustible insulation with a flame-spread rating more than 25 but not more than 500 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in a building required to be of noncombustible construction, provided the insulation is protected from adjacent space in the building, other than adjacent concealed spaces within wall assemblies, by a thermal barrier consisting of
    1. not less than 12.7 mm thick gypsum board mechanically fastened to a supporting assembly independent of the insulation,
    2. lath and plaster, mechanically fastened to a supporting assembly independent of the insulation,
    3. masonry, or
    4. concrete.
  5. Combustible insulation with a flame-spread rating more than 25 but not more than 500 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in the exterior walls of a building required to be of noncombustible construction that is not sprinklered and is more than 18 m high, measured from grade to the underside of the roof, provided the insulation is protected from adjacent space in the building, other than adjacent concealed spaces within wall assemblies, by a thermal barrier consisting of
    1. gypsum board not less than 12.7 mm thick, mechanically fastened to a supporting assembly independent of the insulation and with all joints either backed or taped and filled,
    2. lath and plaster, mechanically fastened to a supporting assembly independent of the insulation,
    3. masonry or concrete not less than 25 mm thick, or
    4. any thermal barrier that, when tested in conformance with CAN/ULC-S101, "Fire Endurance Tests of Building Construction and Materials," will not develop an average temperature rise more than 140°C or a maximum temperature rise more than 180°C at any point on its unexposed face within 10 min (see Note A-3.1.5.14.(5)(d)) (see also Article 3.2.3.7.).
3.1.5.15. Foamed Plastic Insulation
(See Notes A-3.1.4.2. and A-3.1.4.2.(1).)
  1. Foamed plastic insulation is permitted to be installed above roof decks, outside of foundation walls below ground level, and beneath concrete slabs-on-ground of a building required to be of noncombustible construction.
  2. Except as provided in Sentences (3) and (4), foamed plastic insulation with a flame-spread rating not more than 500 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in a building required to be of noncombustible construction, provided the insulation is protected from adjacent space in the building, other than adjacent concealed spaces within wall assemblies, by a thermal barrier consisting of
    1. not less than 12.7 mm thick gypsum board mechanically fastened to a supporting assembly independent of the insulation,
    2. lath and plaster, mechanically fastened to a supporting assembly independent of the insulation,
    3. masonry,
    4. concrete, or
    5. any thermal barrier that meets the requirements of classification B when tested in conformance with CAN/ULC-S124, "Test for the Evaluation of Protective Coverings for Foamed Plastic."
  3. Foamed plastic insulation with a flame-spread rating more than 25 but not more than 500 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in the exterior walls of a building required to be of noncombustible construction that is not sprinklered and is more than 18 m high, measured from grade to the underside of the roof, provided the insulation is protected from adjacent space in the building, other than adjacent concealed spaces within wall assemblies, by a thermal barrier consisting of
    1. gypsum board not less than 12.7 mm thick, mechanically fastened to a supporting assembly independent of the insulation and with all joints either backed or taped and filled,
    2. lath and plaster, mechanically fastened to a supporting assembly independent of the insulation,
    3. masonry or concrete not less than 25 mm thick, or
    4. any thermal barrier that, when tested in conformance with CAN/ULC-S101, "Fire Endurance Tests of Building Construction and Materials," does not develop an average temperature rise more than 140°C or a maximum temperature rise more than 180°C at any point on its unexposed face within 10 min (see Note A-3.1.5.14.(5)(d)) (see also Article 3.2.3.7.).
  4. Foamed plastic insulation with a flame-spread rating more than 25 but not more than 500 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, is permitted in the interior walls, within ceilings and within roof assemblies of a building required to be of noncombustible construction that is not sprinklered and is more than 18 m high, measured from grade to the underside of the roof, provided the insulation is protected from adjacent space in the building, other than adjacent concealed spaces within wall assemblies, by a thermal barrier consisting of
    1. Type X gypsum board not less than 15.9 mm thick, mechanically fastened to a supporting assembly independent of the insulation and with all joints either backed or taped and filled, conforming to
      1. ASTM C 1177/C 1177M, "Glass Mat Gypsum Substrate for Use as Sheathing,"
      2. ASTM C 1178/C 1178M, "Coated Glass Mat Water-Resistant Gypsum Backing Panel,"
      3. ASTM C 1396/C 1396M, "Gypsum Board," or
      4. CAN/CSA-A82.27-M, "Gypsum Board,"
    2. non-loadbearing masonry or concrete not less than 50 mm thick,
    3. loadbearing masonry or concrete not less than 75 mm thick, or
    4. any thermal barrier that, when tested in conformance with CAN/ULC-S101, "Fire Endurance Tests of Building Construction and Materials,"
      1. does not develop an average temperature rise more than 140°C or a maximum temperature rise more than 180°C at any point on its unexposed face within 20 min, and
      2. remains in place for not less than 40 min.
3.1.5.16. Combustible Elements in Partitions
  1. Except as permitted by Sentence (2), solid lumber partitions not less than 38 mm thick and wood framing in partitions located in a fire compartment not more than 600 m2 in area are permitted to be used in a building required to be of noncombustible construction in a floor area that is not sprinklered throughout provided the partitions
    1. are not required fire separations, and
    2. are not located in a care, treatment or detention occupancy.
  2. Partitions installed in a building of noncombustible construction are permitted to contain wood framing provided
    1. the building is not more than 3 storeys in building height,
    2. the partitions are not located in a care, treatment or detention occupancy, and
    3. the partitions are not installed as enclosures for exits or vertical service spaces.
  3. Solid lumber partitions not less than 38 mm thick and partitions that contain wood framing are permitted to be used in a building required to be of noncombustible construction provided
    1. the building is sprinklered throughout, and
    2. the partitions are not
      1. located in a care, treatment or detention occupancy,
      2. installed as enclosures for exits or vertical service spaces, or
      3. used to satisfy the requirements of Clause 3.2.8.1.(1)(a).
3.1.5.17. Storage Lockers in Residential Buildings
  1. Storage lockers in storage rooms are permitted to be constructed of wood in a building of residential occupancy required to be of noncombustible construction.
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 tape, pipe insulation and pipe coverings are permitted to be used in a building required to be of 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 Sentences 3.6.5.1.(1) and (2) provided the ducts are
    1. part of a duct system conveying only ventilation air, and
    2. contained entirely within a dwelling unit.
3.1.5.19. Combustible Piping Materials
  1. Except as permitted by Clause 3.1.5.2.(1)(d) and Sentences (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
    1. have a flame-spread rating not more than 25, and
    2. if used in a building described in Subsection 3.2.6., have a smoke developed classification not more than 50.
  2. Combustible sprinkler piping is permitted to be used within a sprinklered floor area in a building required to be of noncombustible construction. (See also Article 3.2.5.13.)
  3. Polypropylene pipes and fittings are permitted to be used for drain, waste and vent piping for the conveyance of highly corrosive materials and for piping used to distribute distilled or dialyzed water in laboratory and hospital facilities in a building required to be of noncombustible construction, provided
    1. the building is sprinklered throughout,
    2. the piping is not located in a vertical shaft, and
    3. piping that penetrates a fire separation is sealed at the penetration by a fire stop that has an FT rating not less than the fire-resistance rating of the fire separation when subjected to the fire test method in CAN/ULC-S115, "Fire Tests of Firestop Systems," with a pressure differential of 50 Pa between the exposed and unexposed sides, with the higher pressure on the exposed side.
3.1.5.20. Combustible Plumbing Fixtures
  1. Combustible plumbing fixtures, including wall and ceiling enclosures that form part of the plumbing fixture, are permitted in a building required to be of noncombustible construction provided they are constructed of material having a flame-spread rating and smoke developed classification not more than that permitted for the wall surface of the room or space in which they are installed.
3.1.5.21. Wires and Cables
  1. Except as required by Sentence (2) and Article 3.1.5.22., optical fibre cables and electrical wires and cables with combustible insulation, jackets or sheathes are permitted in a building required to be of noncombustible construction, provided
    1. the wires and cables exhibit a vertical char of not more than 1.5 m when tested in conformance with the Vertical Flame Test - Cables in Cable Trays (FT4 rating) in CSA C22.2 No. 0.3, "Test Methods for Electrical Wires and Cables,"
    2. the wires and cables are located in
      1. totally enclosed noncombustible raceways (see Note A-3.1.4.3.(1)(b)(i)),
      2. masonry walls,
      3. concrete slabs,
      4. a service room separated from the remainder of the building by a fire separation having a fire-resistance rating not less than 1 h, or
      5. totally enclosed non-metallic raceways conforming to Clause 3.1.5.23.(1)(b), or
    3. the wires and cables are communication cables used at the service entry to a building and are not more than 3 m long.
      (See Note A-3.1.5.21.(1).)
  2. Except as permitted in Sentences (3) and (4), optical fibre cables and electrical wires and cables with combustible insulation, jackets or sheathes that are used for the transmission of voice, sound or data and are not located in totally enclosed noncombustible raceways are permitted to be installed in a plenum in a building required to be of noncombustible construction, provided the wires and cables exhibit a horizontal flame distance of not more than 1.5 m, an average optical smoke density of not more than 0.15, and a peak optical smoke density of not more than 0.5 when tested in conformance with CAN/ULC-S102.4, "Test for Fire and Smoke Characteristics of Electrical Wiring, Cables and Non-Metallic Raceways," (FT6 rating).
  3. Except as permitted in Sentence (4), where totally enclosed noncombustible raceways are used in a plenum, exposed components of wiring systems with combustible insulation, jackets or sheathes, including optical fibre cables and electrical wires and cables that are used for the transmission of voice, sound or data, that are installed in the plenum or that extend not more than 9 m from the plenum including drop down to the floor level, are permitted provided they exhibit a vertical char of not more than 1.5 m when tested in conformance with the Vertical Flame Test - Cables in Cable Trays (FT4 rating) in CSA C22.2 No. 0.3, "Test Methods for Electrical Wires and Cables."
  4. Cables or wires within plenums that are used for the transmission of signals in fire alarm systems need not comply with the requirements of Sentences (2) and (3).
3.1.5.22. Combustible Travelling Cables for Elevators
  1. Combustible travelling cables are permitted on elevating devices in a building required to be of noncombustible construction.
3.1.5.23. Non-metallic Raceways
  1. Except as required in Sentence (2), subject to the limits on the size of elements that penetrate fire separations as stated in Sentence 3.1.9.3.(2), within a fire compartment of a building required to be of noncombustible construction, totally enclosed non-metallic raceways not more than 175 mm in outside diameter, or of an equivalent rectangular area, are permitted to be used to enclose optical fibre cables and electrical wires and cables, provided
    1. where the wires and cables in the raceways meet or exceed the requirements of Clause 3.1.5.21.(1)(a), the non-metallic raceways meet the requirements for at least an FT4 rating in
      1. CAN/CSA-C22.2 No. 262, "Optical Fiber Cable and Communication Cable Raceway Systems," or
      2. CAN/ULC-S143, "Fire Tests for Non-Metallic Electrical and Optical Fibre Cable Raceway Systems," and
    2. where the wires and cables in the raceways do not meet or exceed the requirements of Clause 3.1.5.21.(1)(a), the non-metallic raceways exhibit a vertical char of not more than 1.5 m when tested in conformance with the Vertical Flame Test (FT4) - Conduit or Tubing on Cable Tray in Clause 6.16 of CSA C22.2 No. 211.0, "General Requirements and Methods of Testing for Nonmetallic Conduit."
  2. Totally enclosed non-metallic raceways used in a plenum in a building required to be of noncombustible construction shall exhibit a horizontal flame distance of not more than 1.5 m, an average optical smoke density of not more than 0.15, and a peak optical smoke density of not more than 0.5 when tested in conformance with CAN/ULC-S102.4, "Test for Fire and Smoke Characteristics of Electrical Wiring, Cables and Non-Metallic Raceways," (FT6 rating).
3.1.5.24. Decorative Wood Cladding
  1. On buildings required to be of noncombustible construction, decorative wood cladding is permitted to be used on the exterior fascias and soffits of marquees or canopies on the building face of a storey having direct access to a street or access route, provided the wood cladding is fire-retardant-treated wood that has been conditioned in conformance with ASTM D 2898, "Accelerated Weathering of Fire-Retardant-Treated Wood for Fire Testing," before being tested in accordance with CAN/ULC-S102, "Test for Surface Burning Characteristics of Building Materials and Assemblies."

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