How To Arrange Bar Bending Schedule For RCC Beams

This construction video tutorial is based on BAR BENDING SCHEDULE FOR RCC BEAM.

From bar bending schedule, one can get the reinforcement calculation for reinforced concrete beam. It gives us details of reinforcement cutting length, type of bends and bend length.

In this construction video, solution is given for two beams having spans of 6 meter. 1st layer of bottom bar of beam is 32 dia and 2nd layer that is called bottom extra is 25 dia.

1st layer of top bar of beam is 25 dia and US bar (extra cover support in second layer) is 25 dia.

Clear cover = 30 mm
Development length = 50 dia
Lapping = 50 dia

To have the complete calculation process, go through the following video

Video Credit : L & T - Learning Technology

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Published By
Rajib Dey
www.constructioncost.co
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Detailed guidelines on Bar Bending Schedule of Beam

This construction video is based on Beam Reinforcement Details. By watching this video, one will be familiar with Bar Bending Schedule of Beam with some easy to follow processes.

Reinforcement in beam

The role of reinforcement is to withstand tensile stresses because of bending and shear in beams for singly reinforced sections. But some factors like architectural reasons or basement floors can limit the depth of section. Therefore, the beam section is designed as doubly reinforced to withstand tensile and compressive stresses and delivered with reinforcement in compression face.

Bar Bending Schedule for RCC Beam

Bar bending schedule is used to make the reinforcement calculation toward reinforced concrete beam. It presents the details of reinforcement cutting length, type of bends and bend length.

The following article will provide you more information on Bar Bending Schedule For RCC Beam. theconstructor.org

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Published By

Rajib Dey

www.constructioncost.co

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Bar Bending Schedule-BBS Civil Engineering Estimation And Casting

Bar bending schedule offers the reinforcement calculation for reinforced concrete beam. It supplies details of reinforcement cutting length, type of bends and bend length.

Here we will take one example for reinforcement quantity calculations for a concrete beam.

Example of RCC Beam Reinforcement Calculation:

Assume a beam of clear length of 4m, 300mm wide by 450mm depth. It consists of 2-12 diameter bars at top, and 2-16 diameter and 1 – 12 diameter bars at the bottom. Diameter of stirrup is 8mm spaced at 180mm center to center. Clear cover to reinforcement provided is 40mm.

Now we will calculate the length of reinforcement on the basis of shapes of reinforcement mandatory for reinforced concrete beam in above example.

We will start with bottom reinforcement, B1.

Bar shape of B1 is as shown below:

RCC Beam Bar Bending Shape

Length of B1 = clear distance between walls + 2 x width of walls – 2 x bar cover + 2 x bend length

Bend length = 6 x 16 = 96 consider as 100mm

Bend length is calculated as 6 x diameter of bar for reinforcement conforming to IS: 1786-1961

Length of B1 = 4000 + 2 x 230 – 2 x 40 + 2 x100 = 4580mm

Length of bar B2 is calculated on the basis of the shape of this bar. This bar bends up closer to the support as shown below:

RCC Beam Bar Bending Shape

Length of bar B2: A + B + C = 4000 + 2 x 230 – 2 x 40 + (1.414xH – H)

H = 450 – 2 x 40 – 2 x 12 – 2 x 12/2 = 334mm

B2 = 4000 + 2 x 230 – 2 x 40 + (1.414×334 – 334) = 4518.3 = 4520mm

Length of Bar T1 = 4000 + 2 x 230 -2 x 40 = 4380mm

Length of Stirrups S1:

RCC Beam Stirrups Length Calculation

Stirrups are spaced at 180mm center to center. Stirrups are provided between walls or support for a beam.

No. of stirrups required for given beam = No. of Stirrups

Length a = 450 – 2 x40 – 8 = 362mm

Length b = 300 – 2 x 40 – 8 = 212mm

Therefore length of 1 stirrup S1 = 2 x (212 + 362 + 90) = 1328 mm

Where 90mm is the minimum hook length as per IS 2502 – Table – II.

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Published By

Rajib Dey

www.constructioncost.co

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