5.2.2.2.Determination of Wind Load (See Note A-5.2.2.2.)

(1) This Article applies to the determination of wind load to be used in the design of materials, components and
    assemblies, including their connections, that separate dissimilar environments or are exposed to the exterior, where these
    are,
    (a) subject to wind load, and
    (b) required to be designed to resist wind load.

    (2) Except as provided in Sentence (3), the wind load referred to in Sentence (1) shall be 100% of the specified wind
    load determined in accordance with Article 4.1.7.1.

    (3) Where it can be shown by test or analysis that a material, component, assembly or connection referred to in
    Sentence (1) will be subject to less than 100% of the specified wind load, the wind load referred to in Sentence (1) shall
    be not less than the load determined by test or analysis.

    (4) Except as provided in Sentence (5), the wind uplift resistance of membrane roofing assemblies shall be determined
    in accordance with the requirements of CAN/CSA A123.21, “Standard test method for the dynamic wind uplift resistance
    of membrane-roofing systems.” (See Note A-5.2.2.2.(4))

    (5) Membrane roofing assemblies with proven past performance for the anticipated wind loads need not comply with
    Sentence (4). (See Note A-5.1.4.1.(5))

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.