Anchor bars are the bars which are given on compression side to hold the stirrups or lateral reinforcements and the main bars.

Rodney Turner
Structural Engineer
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Anchor bars are the bars which are given on compression side to hold the stirrups or lateral reinforcements and the main bars.
It is done for two reasons :
Anchor bar in single RC ream is provided to hold vertical stirrups.
Vertical stirrups are designed to resist shear force.
We use 8 or 10 dia for anchor bar in beam.
Anchor bars provided for the compression side of single RC beams. It is provided to hold or support transverse reinforcement bars.