ABSTRACT
If the practical nominal moment in a concrete beam needs to be increased and the beam size cannot be increased, ACI code, section 10.3.5.1 allows for additional steel to be added in tension provided it is also added in compression. Two conditions can exist when top steel is added to a beam.
Condition 1: Both the tensile and compressive steels yield before the concrete strain reaches 0.003.
Condition 2: The tensile steel yields but the compressive steel does not yield before the concrete strain reaches 0.003.
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