What is Chair Reinforcement in Building Construction ?
Chair Bar Guidelines for Reinforcement Chair Bar Guidelines for Reinforcement (As per IS Code) 1. Purpose of Chair Bars Chair bars are used to hold the reinforcement bars in position during construction to prevent displacement while pouring concrete. They ensure the required spacing is maintained between the top and bottom reinforcement bars as per design specifications. 2. Spacing of Chair Bars As per IS 456:2000 – Plain and Reinforced Concrete Code of Practice : Chair bars should be spaced at nominal 1000 mm centers , unless specified otherwise. For heavily reinforced slabs or where vibration may cause displacement, spacing can be reduced to 600-800 mm . 3. Diameter of Chair Bars As per IS 2502:1963 : The diameter of a chair bar is recommended as hc/50 , where hc is the clear cover. The diameter should not be less tha...
