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i have 2 questions related to flat roof joists.
joists 4x2 400mm centres
Q1: Can the joist sit directly on top of steel UB then block work either side and above or is a timber wall plate required?
Q2: wall plate / leadger board connected to existing cavity wall, what size threaded rod is typically used M12 ? and i assume centers will also be 400mm staggered with flat plate washer and nut?
joists 4x2 400mm centres
Q1: Can the joist sit directly on top of steel UB then block work either side and above or is a timber wall plate required?
Q2: wall plate / leadger board connected to existing cavity wall, what size threaded rod is typically used M12 ? and i assume centers will also be 400mm staggered with flat plate washer and nut?