A stirrup is a closed loop of reinforcement bar that is used to hold the main reinforcement bars together in an RCC structure. In a column, the stirrups provide the lateral support to the main bars against buckling. When used in beams, a stirrup is termed as shear or transverse reinforcement since it withstands the shear force. Stirrups can be of various shapes depending on the design and shape of the load bearing member e.g. Circular, polygonal, a U-stirrup or a crosstie. However the most commonly used shape in normal construction is a rectangular or a square one.
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