What is the exact meaning for under & over reinforced beams
& when they have to used..

Answer Posted / sahil sharma

under reinforced beams are those in which less reinforcement
is provided as compared to balanced section,these are
provided when design moment is less than max moment of
resistance(which is provided by balanced section).
over reinforced beam is just reverse of above.these are
provided when we have extra steel (or money) to waste.over
reinforcement doesn't mean that it will provide extra strength.

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