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Thanks. I’ve ordered 75mm x 200mm C16 treated timber and the timber merchants are cutting it to 165mm (so the thickness of the timber is slightly oversized – the timber could only be purchased in 50mm or 75mm and it would be unnecessary to cut down the thickness as it is offering more strength)...

Yep I meant cementing to the sides. The span is 4.1m. The centres of the joists are 380mm

Thanks. There is a timber wall plate so that should be fine. Should I cement the bearing in place? One other thing is that the timber for the other joists is 165mm x 65mm. An awkward size! When I went to order some new treated timber I could only order 150 or 170mm x 47mm. Is 150mm x...

Thanks for your advice. Can the joists just sit in the wall the same distance they have done in the past or do they need a form of joist hanger?

I had a chimney removed and the shorter joists to the chimeny on the left hand side of the room were not supporting anything so I have removed them, the cavity is left in the wall. I thought I should leave the joists overhanging on the right as they are supported on the steel beam and run into...