PREPARATION OF BAR BENDING SCHEDULE

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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 – 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 of hooks and bends in the reinforcement bars – these are adhered to the standard proportions:

(a) Length of one hook = (4d) + [(4d+ d)] – 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 at  say 30o to 60o, but it is generally 45o) = l1 – l2= la

Where,

formula1

formula2

Fig 1: Hooks and bends in Reinforcement

Giving different values to  respectively), we get different values of la, as shown below:

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Figure 2 shows the technique to reach at the length of hooks & the total length of a given steel reinforcement.

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Fig : Typical Bar Bending Schedule

 

2 thoughts on “PREPARATION OF BAR BENDING SCHEDULE

  1. Sheema Roy Reply

    First of all, being bored at work does pay well if you have a Smartphone and you browse through blogs.
    Amazing information with facts thoughtfully incorporated within. Definitely going to come back for more! :)

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