The plate thickness of raft foundation is determined by anti-punching and anti-shearing calculation.
< br >
The plate thickness of the raft should not be less than 200mm, the beam plate of the high-rise building should not be less than 300mm, and the plate type should not be less than 400mm.
< br >
The thickness of the beam and slab raft should not be less than 1\/20 of the minimum span of the calculated section. For the beam and slab raft foundation of high-rise buildings with more than 12 floors, the thickness of the bottom plate should not be less than 1\/14 of the short side of the maximum two-way plate grid, and should not be less than 400mm.