A chair bar is a small bent steel bar used in reinforced concrete construction to hold the top layer of rebar at the correct height above the bottom layer. Its primary function is to maintain proper spacing between the top and bottom reinforcement mats, ensure the correct concrete cover, and prevent the top rebar from sagging during the concrete pour. Chair bars are essential for the structural integrity and strength of elements like slabs, footings, and raft foundations #civilgyan_8 #civilgyan_
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