Architectural services

structural quesion for a summer house over a 4 inches reinforced concrete slab.

Anonymous user 06/03/2024 - 2.32 PM

Hello, I have a 4 inches concrete slab with stheel reinforced mesh. measures are 7.4 m x 3,5 m the mesh is about 2 inches away from the edges. I want to erect a summer house using timber frames and in the outside it will be cement bouards and render as it is close to the boundary and is a requirement from building reg to be non iflamable, so render seems a simple option. taking into consideration that concrete slab is only 4 inc depth i was wondering if it was enough to cope with the weight of the frames, roof, cement boards and render and if i could directly attach the frames to it and if the slab would resist the load. if so what distance from the edge? my quess is that frame must go 100% over the stheel reinforced mesh, right? so frames must be about 3 inches away from the edges. what do you think ? Also I was thinking thyat is weigtht is too much, then i could use a 4x4 C24 or 2x5 c24 joists just over the concrete slab so the weight of the frame and roof would be distributed along the spam of the slab instead of the borders only and somehow ease the pressure over the edges and avoid it to snap, but Im not sure if this is somethign should be done. I will have to insulate anyways with 100mm PIR so raising the floor from the concrete was already in the plans. what you think shall I attach teh frames directly into the concrete slab or lay joist over it and fix the frames over the joists? frames would be done using 2 x 4 c16 timber. any thougths would be very welcomed. thanks in advanced