In a 'composite beam' (steel + RC slab), 'shear connectors' are provided to:
Choose the correct answer
Only aesthetic — the slab always acts compositely
Transfer horizontal interface shear — forcing slab and steel beam to deflect together without slip, enabling composite bending action
Provide fire resistance to steel
Anchor the beam to the foundation
Correct Answer
B. Transfer horizontal interface shear — forcing slab and steel beam to deflect together without slip, enabling composite bending action
Why is this the answer?
Composite steel-concrete beam: steel beam + RC slab act together if interface is connected. Shear connectors (stud connectors, IS 11384): transfer horizontal shear at steel-concrete interface → slab acts with steel in compression → neutral axis rises → reduced depth needed. Without connectors: no composite action (slip at interface). Partial composite: 50–75% shear connection for economy. Effective flange width: IS 11384 limits slab acting width.
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