Someone has asked me to help put in an upper floor in a farm outbuilding. The room dimensions are 7 metres by 5 metres constructed with a single thickness of breeze blocks. He is planning having 7 metre long joists and fixing down traditional tongue and groove floorboards on top.
Is this feasible? 7 metres sounds like a very long span unsupported, assuming that you can even get 7 metre long joists? I would have thought that at least one cross beam would be needed for such a span.
I'm happy to lay floorboards and do the associated DIY but I'm no structural engineer!
Suggestions?