Plywood

The allowable Component and Cladding (C&C) plywood loads have been updated to new values from the CSA O86 2010 Tables 7.3A-7.3B, from the O86 2001 values that were being used.

The following materials have been added:

• 3-ply 12.5 mm and 6-ply 15.5 mm plywood, for both Doug-fir (DF) and Canadian Softwood Plywood (CSP).

For the following materials, allowable strengths have increased for at least one stud spacing:

• DF: 18.5 mm, 7 ply 0° (horizontal orientation);
• CSP: 3 ply 7.5 mm and 9.5 mm; 4 ply and 5 ply 12.5 mm°; 5 ply 15.5 mm; 7 ply 18.5 mm; all 0°.

For the following materials, allowable strengths have decreased for at least stud spacing:

• DF: 4 ply 15.5 mm, 0°; 5 ply and 6 ply 18.5 mm, 0 and 90°.
• CSP: 3 ply, 9.5 mm, 90°; 4 ply and 5 ply 15.5 mm, 0°; 5 ply and 6 ply 18.5 mm, 0 and 90°.

Note that CSP 5 ply, 15.5 mm, 0° is in both lists because it decreased for 304.8 stud spacing and increased for 406.4 and 609.6 spacing.

OSB

The OSB Type 1 material has been removed, as it is no longer in CSA O86. It had been in table 7.3C

The Construction OSB values, which were in Table 7.3D, did not change for CSA O86 2010 Table 7.3C