Schedule of bars (or bar bending schedule) is a list of reinforcement bars, with regard to a known RCC work item, and is offered in a tabular format for easy visual reference. This table sums up all the required specifics of bars â€“ diameter, length of each bent, total length of each bar, shape of bending & straight portions, number of each type of bar and angles of bending. This statistics is a great benefit for preparing an estimate of quantities.
Figure 1 depicts the shape and proportions ofÂ hooks and bends in the reinforcement barsÂ â€“ these are adhered to the standard proportions:
(a) Length of one hook = (4d) + [(4d+ d)] â€“ where, (4d+ d) denotes to the curved portion = 9d.
(b) The additional length (la) that is presented in the simple, straight end-to-end length of a reinforcement bar due to being bent up atÂ Â say 30oÂ to 60o, but it is generally 45o) = l1Â â€“ l2= la
Fig 1: Hooks and bends in Reinforcement
Giving different values toÂ Â respectively), we get different values of la, as shown below:
Figure 2 shows the technique to reach at the length of hooks & the total length of a given steel reinforcement.
Fig : Typical Bar Bending Schedule