The Ontario Building Code | Nails
9.29.8.3. Nails
(1) Nails for fastening fibreboard sheets shall be not less than 2.6 mm shank diameter casing or finishing nails of sufficient length to penetrate not less than 20 mm into the supports.
(2) Nails shall be spaced not more than 100 mm o.c. along edge supports and 200 mm o.c. along intermediate supports.
In Plain Language
This clause sets nailing specs for fibreboard sheets: nails must have at least a 2.6 mm shank and penetrate at least 20 mm into supports, spaced no more than 100 mm apart at edges and 200 mm apart at intermediate supports.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.