Question

A raft foundation is to be constructed on a sandy soil. The maximum differential settlement and limiting maximum settlement as recommended by Indian standard code are :

Max. differential Limiting max.
settlement settlement

• A. 40mm 65mm to 10mm
• B. 40 mm 40mm to 65 mm
• C. 25mm 65mm to 100mm
• D. 25mm 40mm to 65mm

Answer 1

The correct option is D 25mm 40mm to 65mm

For Raft foundation on sand maximum permissible settlement is 40 to 65 mm. The permissible differential settlement is 25 mm. For raft foundation on clay, limiting maximum settlement 65 to 100 mm. Maximum differential settlement 40 mm.