Looking for some advice on a supporting wall for a mezzanine floor. Im looking to build a mezzanine in a n office conversion. There are 2 spans one 4.8 meters and one about 3.5. I am planing on copying the plan from a neighbour, but am unsure about his supporting wall. The plan is to have...

Hey everyone. I have have scoured the board looking for an answers to a fairly specific question so I apologize it is already out there and I just have not found it. So my situation is that I think I was given some bad information and now I am trying to resolve it most efficient way possible...