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.