Building Construction
Grillage foundation

Is light and economical
Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity
Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth
All listed here

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Building Construction
Raft foundations are used for:

Spanning over small soft or loose pockets
Counter acting the hydrostatic effect
Providing increased area of foundation over poor bearing capacity of soil
All listed here

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