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When are raft foundations used?
Raft foundations are used when the soil has a low bearing capacity and the load is to be distributed over a large area. It can be used when there are high chances of differential settlement.
Do raft slabs have footings?
Raft Slabs do not have excavated footings as compared to the conventional slab, which has footings.
What is the thickness of the raft foundation?
the thickness of Raft foundations is typically fixed between 150 mm to 300 mm.
What is the minimum size of the raft foundation?
The minimum size of the raft foundation is 3m x 2m. Notably, the longer dimension should be less than 1.5 times the shorter dimension.
Do raft foundations need piles?
Using piles with a raft foundation increases the effective size of the footing and thus aids in resisting the horizontal loads. This can also help in a significant reduction of the differential settlement as well.
Is the raft foundation shallow or deep?
Raft footings come under shallow foundations.