chair bar in slab reinforcement. chair bar kaise dete h #building#construction #works #shorts #viral

chair bar in construction work. Spacing & purpose of providing chair bars in construction. #construction #viral #civilengineering #shorts #building #home #works #viral #trends #steel #reinforcement 1. What is a chair bar in construction? A chair bar is a support bar placed and tied in between the upper & lower reinforcement cage to maintain the gap and stability of reinforcement. As they are somewhat bent up like a chair, and provides a sitting arrangement for the upper cage, we call it, a chair bar in civil engineering. 2. What is the purpose of providing a chair bar in construction reinforcement? 1. To maintain the required gap between the upper & lower reinforcement cage in footings, slabs, raft foundations, etc. 2. To maintain the clear cover for the reinforcement at the time of concrete vibration. 3. Protecting the top & bottom cage from displacement and sagging at the time of concreting work, due to the movement of trolleys, walking of the workers, dead load of the fresh concrete, etc. 4. Providing extra support for the reinforcement bars. 3. What should be the diameter of chair bars used in construction? Generally, the chair bars are made of rebars of diameter 12mm and above. The most common dia. bars are 12mm, 16mm, and in some cases 20mm