The 'flat slab' system (without beams) transfers loads to columns through:
Choose the correct answer
Only beam action in one direction
Two-way slab action directly to columns — column strips and middle strips distribute moments; punching shear critical at columns
Arch action between columns
Pre-stressed tendons only
Correct Answer
B. Two-way slab action directly to columns — column strips and middle strips distribute moments; punching shear critical at columns
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Flat slab: slab directly supported on columns without beams. Load transfer: (1) Column strip (width = half flat slab width on each side) takes most load; (2) Middle strip takes less. Punching shear at column critical. Column head (drop panel) and column capital reduce punching shear depth. IS 456 Cl. 31: direct design method (DDM) or equivalent frame method (EFM) for moment distribution.
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