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Question

For a composite steel-beam and RCC-slab floor construction

A
the grade of concrete has to be M20 for the composite action to be satisfactory
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B
the longitudinal reinforcement of the slab has to be welded to the beam to develop monollthicity
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C
a notch is made in the slab to house the upper flange of the beam
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D
shear connectors are provided to develop the composite action
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Solution

The correct option is D shear connectors are provided to develop the composite action
Shear connectors prevent separation between steel girder and in-situ concrete slab by transferring horizontal shear force along contact surface without slip. Thus they are important structural element for composit steel beam and RCC slab floor construction.

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