Browse Forums Building A New House Re: Slab pier question 2Jun 23, 2016 8:48 pm I does not look very scary to me. The steel is light gauge. My understanding is that N12 equates to a 12mm dia bar. This is the minimum sized steel bars that can be used. 16mm is more common for stiffened slabs. A 85mm slab is quite thin. 100mm or 120mm is more common particularly where setdowns are required for wet areas. Good luck with your build. I should have followed up on this thread. So, the pier foundation wasn't large enough on the side it was leaning towards, and the NBN cable went through the pier, just… 8 12127 Just be careful with building stability during construction, that is when the structure may be weakened, refer to your engineering drawings for stability methodology. 1 7223 ![]() |