why reinforcement is not provided at centre for beams r column

Answer Posted / raghuram

MAIN PURPOSE OF REINFORCEMENT IN BEAMS IS TO RESIST TENSION
IN THE LOWER FIBRES BELOW THE NEUTRAL AXIS. AS THE TENSILE
STRESS IS 0 AT THE CENTRE AND INCREASES LINEARLY TO THE
BOTTOM FIBRE WHICH INDICATES THAT MAX TENSILE STRESS IS AT
THE EXTREME FIBRES SO REINFORCEMENT IS NOT PROVIDED AT THE
CENTRE

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