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What is bar bending schedule in RCC?

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Asked: July 22, 20202020-07-22T11:03:11+05:30 2020-07-22T11:03:11+05:30In: Structural Engineering
vivek gami
vivek gami

vivek gami

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What is bar bending schedule in RCC?

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  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru
    2020-10-11T16:57:23+05:30Added an answer on October 11, 2020 at 4:57 pm

    Bar Bending :-

    The process of bending reinforcing steel into shapes required for reinforced concrete construction.

    Bar bending schedule :-

    Bar bending schedule (or schedule of bars) is a list of reinforcement bars, a given RCC work item, and is presented in a tabular form for easy visual reference. This table summarizes all the needed particulars of bars – diameter, shape of bending, length of each bent and straight portions, angles of bending, total length of each bar, and number of each type of bar. This information is a great help in preparing an estimate of quantities.

    Advantages of Bar bending schedule (BBS) :

    1. When Bar bending schedule is available, cutting and bending of reinforcement can be done at factory and transported to site. This increases faster execution at site and reduces construction time and cost due to less requirement of workers for bar bending. Bar bending also avoids the wastage of steel reinforcement (5 to 10%) and thus saves project cost.

    2. Using bar bending schedule for when used for Fe500, it saves 10% more steel reinforcement compared to fe415.

    3. It improves the quality control at site as reinforcement is provided as per bar bending schedule which is prepared using the provisions of respective detailing standard codes.

    4. It provides the better estimation of reinforcement steel requirement for each and every structural member which can be used to compute overall reinforcement requirement for entire project.

    5. It provides better stock management for reinforcement. Steel requirement for next phase of construction can be estimated with accuracy and procurement can be done. This prevents stocking of extra steel reinforcement at site for longer time, preventing corrosion of reinforcement in case of coastal areas. It also prevents shortage of reinforcement for ongoing work by accurate estimation and thus concrete construction works can proceed smoothly.

    6. Bar bending schedule is very much useful during auditing of reinforcement and provides checks on theft and pilferage.

    7. Bar bending schedule can be used for reinforcement cutting, bending and making skeleton of structural member before it can be placed at the required position. Other activities such as excavation, PCC etc can proceed parallel with this activity. So, overall project activity management becomes easy and reduces time of construction. It becomes helpful in preventing any damages due to construction time overrun.

    8. It provides benchmarks for quantity and quality requirements for reinforcement and concrete works.

    9. Bar bending schedule provides the steel quantity requirement much accurately and thus provides an option to optimize the design in case of cost overrun.

    10. It becomes easy for site engineers to verify and approve the bar bending and cutting length during inspection before placement of concrete with the use of bar bending schedule and helps in better quality control.

    11. It enables easy and fast preparation of bills of construction works for clients and contractors.

    12. The quantity of reinforcement to be used is calculated using engineering formulas and standard codes, so there is no option for approximate estimation of steel reinforcement.

    13. With the use of bar bending schedule, mechanization of cutting and bending of reinforcement can be done, again reducing the cost and time of project and dependency on skilled labor requirement. It also improves the reliability on accuracy of bar cutting and bending.

    14. When mechanized bar cutting and bending is used, the cost of reinforced concrete work per unit reduces and helps in cost optimization of construction project.

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  2. Kuldeep Singh

    Kuldeep Singh

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    Kuldeep Singh Learner
    2020-07-22T18:10:56+05:30Added an answer on July 22, 2020 at 6:10 pm

    Bar bending schedule (BBS) is a comprehensive, detailed list of reinforcement bars to be used in an RCC construction along with their number, location, mark, type, size, lengths, details in correspondence with the drawings. It also includes the timing for the bending of each bar, and that is why it’s called a bending schedule.

    Bars are needed to be bent in order to give them the desired reinforcement shape. Stirrups and anchorages are two places where bar bending is compulsory. In addition, when we need to join bars, we might want to bend them on the ends before welding or fastening.

    BBS also gives a clear and logical understanding as to how much bars of what sizes will be needed to be procured and bent by what time so that no delay, all procurement is done with minimal transport expenses, and all bending is done with minimal machine and labor costs.

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