Types of Shear Reinforcement

The following three types of shear reinforcement are used

• Vertical stirrups
• Bent up bars along with stirrups.
• Inclined stirrups.

Vertical stirrups

• These are the steel bars vertically placed around the tensile reinforcement at suitable spacing along the length of the beam. Their diameter varies from 6mm to 16mm.
• The free ends of the stirrups are anchored in the compression zone of the beam to the anchor bars (hanger bar) or the compressive reinforcement.
• The spacing of stirrups near the supports is less as compared to spacing near the midspan since shear force is maximum at the supports.

Type of vertical stirrups:

• Single Legged Stirrup
• Two Legged Stirrup
• Four Legged Stirrup
• Six Legged Stirrup

Bent up Bars along with Vertical Stirrups

• These bent up bars resist diagonal tension. These bars are usually bent at 45°.

Inclined Stirrups

• Inclined stirrups are also provided generally at 45° for resisting diagonal tension. They are provided throughout the length of the beam.