The Ontario Building Code | Fastening for Sheathing or Subflooring

9.23.3.5. Fastening for Sheathing or Subflooring="http://thehandyforce.com/flooring/" title ="Handyman flooring install Toronto">flooring

(1) Except as required by Sentence (5), fastening of sheathing and subflooring="http://thehandyforce.com/flooring/" title ="Handyman flooring install Toronto">flooring shall conform to Table 9.23.3.5.

Table 9.23.3.5.
Fasteners for Sheathing and Subflooring="http://thehandyforce.com/flooring/" title ="Handyman flooring install Toronto">flooring

Forming Part of Sentence 9.23.3.5.(1)

Item	Column 1	Column 2	Column 3	Column 4	Column 5	Column 6
	Element	Minimum Length of Fasteners, mm				Minimum Number or Maximum Spacing of Fasteners
		Common or Spiral Nails	Ring Thread Nails or Screws	Roofing Nails	Staples
1.	Board lumber 184 mm or less wide	51	45	N/A	51	2 per support
2.	Board lumber more than 184 mm wide	51	45	N/A	51	3 per support
3.	Fibreboard sheathing up to 13 mm thick	N/A	N/A	44	28	150 mm (o.c.) along edges and 300 mm (o.c.) along intermediate supports
4.	gypsum sheathing up to 13 mm thick	N/A	N/A	44	N/A
5.	Plywood, OSB or waferboard up to 10 mm thick	51	45	N/A	38
6.	Plywood, OSB or waferboard over 10 mm and up to 20 mm thick	51	45	N/A	51
7.	Plywood, OSB or waferboard over 20 mm and up to 25 mm thick	57	51	N/A	N/A

(2) Staples shall not be less than 1.6 mm in diameter or thickness, with not less than a 9.5 mm crown driven with the crown parallel to framing.

(3) Roofing nails for the attachment of fibreboard or gypsum sheathing shall not be less than 3.2 mm in diameter with a minimum head diameter of 11.1 mm.

(4) flooring="http://thehandyforce.com/flooring/" title ="Handyman flooring install Toronto">flooring screws shall not be less than 3.2 mm in diameter.

(5) Where roof sheathing supports are spaced at more than 406 mm o.c., the maximum spacing of fasteners for roof sheathing shall be 150 mm along edges and intermediate supports.

9.23.4. Maximum Spans