Solid timber 180mm x 19mm secret nailed
It is certainly more complicated and more susceptible to gapping.
Here's what I found online:
http://www.paradise-timbers.com.au/pdf/ ... cedure.pdf
Concrete slab level reference
I'll have a crack.
http://www.qbcc.qld.gov.au/sites/defaul ... uide_0.pdf
76 pages - must be something for you?
Building, Renovating, Extending, Splitter Blocks, Subdivisions, Structural renovations