9.29.9.

(1) Particleboard finish shall conform to ANSI A208.1, “Particleboard, Mat-Formed Wood”.

(2) OSB or waferboard finish shall conform to,

(a) CAN/CSA-O.325, “Construction Sheathing”, or

(b) CSA O437.0, “OSB and Waferboard”.

(1) Except as provided in Sentences (2) and (3), the minimum thickness of O-2 grade OSB used as an interior finish shall conform to that shown for plywood in Table 9.29.6.1.

(2) Thickness listed in Table 9.29.6.1. shall permit a manufacturing tolerance of – 0.4 mm.

(3) No minimum thickness is required where O-2 grade OSB is applied over continuous backing.

(4) OSB conforming to O-1 grade, waferboard conforming to R-1 grade and particleboard shall be,

(a) not less than 6.35 mm thick on supports not more than 400 mm o.c.,

(b) not less than 9.5 mm thick on supports not more than 600 mm o.c., and

(c) not less than 6.35 mm thick on supports not more than 600 mm o.c. in walls where blocking is provided at midwall height.

(5) OSB conforming to CAN/CSA-O325.0, “Construction Sheathing”, shall meet the minimum panel mark of,

(a) W16, on supports not more than 400 mm o.c.,

(b) W24, on supports not more than 600 mm o.c., and

(c) W16, on supports not more than 600 mm o.c. where blocking is provided at midwall height.

(1) Nails for fastening particleboard, OSB or waferboard shall be not less than 38 mm casing or finishing nails spaced not more than 150 mm o.c. along edge supports and 300 mm o.c. along intermediate supports.

(1) All particleboard, OSB or waferboard edges shall be supported by furring, blocking or framing.