This may be a stupid question however, when complying with the Building Code do you need to comply with the objectives, functional requirements and the performance requirements or is there a hierarchy.
I am particularly thinking about cladding systems which may fail the performance requirements which are deterministic but might pass the functional requirements which use the terms “low probability” and opens up the opportunity to carry out a probabilistic assessment.
Building Act s18 states ‘building work not required to achieve performance criteria additional to or more restrictive than building code’. I have always understood have to follow performance criteria - C3.5, 3.6 and 3.7 presumably apply. Cheers Carol
When alternative design was more common it was always to satisfy the performance requirements. Even though the performance requirements are a mess at the moment that is still the correct process as Carol has pointed out.