what is the basic difference between a singly reinforce
section & a doubly reinforce section?

Answer Posted / saikat ganguly

in case of singly reinforced beam, the reinforcement is provided in the bottom i.e the tension zone to take care of the tension. but at the same time dummy reinforcements are provided at the top in order to tie the bars using stirrups.

In case of doubly reinforced beams, reinforcement is provided in both tension as well as in the compression zone

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