Codes, Standards & Regulations
There are no Australian Standards specifically for purlins, but several are relevant.
AS/NZS4600, the SAA Cold formed steel structures code
This code is referred to in the Building Code of Australia and various state building regulations. Compliance with it is a requirement of the building codes.
AS/NZS4600 cites three material standards, namely:
- AS1397, Steel sheet and strip – Hot-dipped zinc-coated or aluminium zinc coated
- AS1594, Hot rolled steel flat products
- AS1595, Cold rolled unalloyed low carbon steel sheet and strip.
- AS1163, Structural Steel Hollow Sections
- AS3678, Structural Steel - hot rolled plates, floor plates and slabs
Purlins are normally rolled from steel manufactured in accordance with one of these standards. GALVASPAN® steel conforms to the requirements of AS1397.
Other steels are not excluded but their properties and suitability must be established by the purlin manufacturer by analysis, test or other means. It’s then up to the design engineer to independently satisfy him or herself of the suitability of the steel.
Other relevant standards include:
- AS1170, the SAA Loading code. (Part 1: Dead and live loads and load combinations. Part 2: Wind forces.)
- AS4100, the SAA Steel structures code.
