Issue 48 – April 2013
The focus of BRANZ's Bulletin 557 Timber-framed garages is on using NZS 3604 Timber-framed buildings as the design Standard. As such, the solution is conservative because NZS 3604 is for the design of importance level 2 (IL2) structures, and stand-alone unoccupied garages are IL1 structures. The design loads for IL1 structures are less than those for IL2 structures. Designers always have the option of using specific engineering design.
Summarised from BRANZ Guideline, March 2013.