Changes to Timber Standards

14th May 2010

Re: Changes to Timber Standards – AS 1720.1 Timber Structures – Part 1 Design Methods

As a valued user of Hyne product, we would like to keep you updated with recent changes to the structural design properties of mechanically graded structural softwood framing. 

Whilst the new Australian Standard (AS1720.1:2010) has now been released, the Building Code of Australia (BCA) will not call up these changes until at least May 2011.

Until such time that these changes are incorporated in the BCA, Hyne will produce it’s mechanically graded framing products to ensure it complies with both the old standard (AS1720.1:1997) as well as the new standard (AS1720.1:2010).

Properties of both the old and new standards are set out in Table 1 below. The properties highlighted in green will be the new minimum properties that Hyne product will be manufactured to.

Table 1:  Characteristic values for design

Note that the values in Table 1 apply only to material of depths 70-140mm.  Designers should refer to values in the respective standards.

As a user of Hyne product, this will give you the flexibility to utilise the new properties immediately or continue to use the old properties until the new properties are referenced in the BCA.

Should you require further technical information on these changes, please contact:

Hyne Product Info– 1300 30 HYNE (4963) Or info@hyne.com.au