Explain me .which type of footings required for all type of soils like clay,black soil,gravel soil . . etc?
Answer:
It depends on loads of sturcture and bearing capacity of soil.It may be isolated footing if load condition is light to medium and bearing capacity of soil is high to medium( 3Tsf to 1 tsf). In other case, if load condition is high and bearing capacity of soil is low then mat or raft foundaton is preferable.(Cause in that case isolated footing over-lap each other.)eg,the bearing capacity of clay, black soil is low and gravel soil, sandy soil(coarse) is high.
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