Structural Plywood AS/NZS 2269

Structural Plywood

2.1 Introduction

Structural plywood is an engineered wood panel with defined and codified physical and mechanical

properties. Structural plywood in Australia and New Zealand is manufactured to Australian/New Zealand

Standard AS/NZS 2269 Plywood – Structural. This Standard sets out the minimum performance

requirements for the manufacture of structural plywood acceptable to users, specifiers, manufacturers

and building authorities in Australia and New Zealand.

Plywood manufactured to AS/NZS 2269 is

suitable for use in all permanent structures and is the plywood type intended for use in structural

applications discussed in this manual.

Structural plywood branded with the EWPAA / JAS

ANZ mark certifies the product has been manufactured

fit-for-purpose to the structural plywood Standard

AS/NZS 2269.

Structural plywood manufactured to AS/NZS 2269 is

available with one bond type and in a range of timber

species, stress grades, veneer qualities, veneer

arrangements (constructions) and thicknesses.

2.2 Bond Type

All structural plywood manufactured to AS/NZS 2269 has a permanent Type A phenolic resin bonding the

individual timber veneers. The Type A bond is produced from phenol or resorcinol formaldehyde and is

readily recognisable by its dark colour. The type A bond is durable and permanent under conditions of

full weather exposure, long term stress, and combinations of exposure and stress.

Note:

Even though the structural plywood phenolic bond is durable, the plywood will only be

as durable as the timber species from which it is made. If the plywood is going to be

used in weather exposed applications or under other exposure conditions of severe

hazard, the durability of the timber veneers must be considered and the plywood

preservative treated if required to meet the hazard requirement.

2.3 Timber Species Used

Structural plywood is manufactured from either hardwood or softwood timber veneers or a combination

of both. The dominant timber species used in structural plywood in Australia and New Zealand is

plantation pine (radiata, hoop or slash) however other timber species, including eucalypt hardwoods, are

available.

2.4 Stress Grades

A stress grade defines a codified suite of strength and stiffness properties. There are eight possible

stress grades for structural plywood listed in AS 1720.1 Timber Structures Code. The stress grades are: F7,

F8, F11, F14, F17, F22, F27 and F34. The characteristic strength and stiffness properties for each stress

grade are tabulated in the Timber Structures Code AS1720.1-1997 and reproduced in Table 5.1A, Error!

Reference source not found. of this manual. The most commonly available stress grades are F8, F11

and F14, higher stress grades F17, F22, F27 and F34 are also available. However availability should be

checked before specifying.

2.5 Veneer Quality

There are five veneer qualities permitted for structural plywood in AS/NZS 2269. The standard veneer

qualities are A, S, B, C, and D. The five veneer grades allow structural plywood to be specified with face

and back veneer qualities to suit the intended application. These include decorative structural uses7

through to applications where aesthetics is not a consideration and structural performance alone is the

requirement. Other non-standard face veneer qualities are permitted under AS/NZS 2269.

Note:

Panels with A, S, B, and C faces are sanded smooth, D grade faces may be unsanded as

they are typically used in structural, non-aesthetic applications. Hence, there will be

knot holes, splits, gum pockets,

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