Type of Stirrup Bar Reinforcement

Type of Stirrup Bar Reinforcement: Stirrups are usually provided to hold in place the reinforcement bars. Stirrups are provided in column to prevent them from buckling.

Type of Stirrup Bar Reinforcement

In beam they are provided to resist the diagonal shear caused by the vertical and transverse tension.

A: As you see in the above image, stirrups are provided to the laterally to confine the longitudnal bars, thus it improves the ductility and strength of the column. At the later stages it also prevents buckling of individual bars.

B: As you can see in the above image, stirrups are provided closed loop of small dia bars( Stirrups) at regular intervals along its length. These are provided to resist the Flexural failure and Shear failure/Diagonal crack of beam.

U shaped stirrups are placed in the tension side of concrete beams in which shear crack would occur. Closed Stirrups are placed to resist the a substantial amount of torsion. 2 legged, 4 legged, 6 legged are some of the type of stirrups used in the construction.

“Stirrups” or “Lateral ties” are provided to hold the main Reinforcement Bar together and they are always perpendicular to the main bar in a beam (FIG A). We know a Beam under loading, always elongates and stretches due to tensile forces in tension zone and compressive forces in compression zone. Whenever the load acts on it, it causes transverse and vertical tension because of which diagonal shear is produced. These stirrups resist “shear failure” Diagonal cracks are resisted by these. Shear failure is also called as diagonal tension failure. So they prevent the longitudinal bars from bending outward.

In columns it resist the “buckling failure.” They prevent the column from Buckling. Imagine a rectangular column that has a very large cross section,the side bars in a column may be a long way form the corners of the stirrups. So we need to make those intermediate links inorder to tie all the side bars and prevent them from buckling.