Description

This Standard specifies requirements for the manufacture, grading, finishing and branding of structural plywood. It provides specifications for both stress and surface grades and specifies veneer qualities, bond quality, standard lay-up construction, dimensional tolerances, joints, moisture content and characteristic strength and stiffness values for the nominated stress grades. Five surface grades, based on the veneer quality of the face and back veneers, A, S, B, C and D and one bond quality, Type A bond, are prescribed.  Cited in Ministry's Simple House Acceptable Solution.

Scope

This Standard specifies requirements for the manufacture, grading, finishing and branding of structural plywood. Specifications for both stress and surface grades are also provided. The Standard also specifies veneer quality, bond quality, standard lay-up construction, dimensional tolerances, joints, moisture content and characteristic strength and stiffness values for the nominated stress grades. The following alternative methods for the determination of stress grades for structural plywood, are also provided:

• a) Veneer stiffness determination;
• b) Mechanical stress grading of the finished sheet of plywood; and
• c) In-grade testing of finished plywood panels.

Five surface grades, based on the veneer quality of the face and back veneers, A, S, B, C and D and one bond quality, Type A bond, are prescribed.