#rcc beam

[civilengineermukeshsah]

How to Find Depth of RCC Beam for Residential Building for Different Length

[shuvongkor-barman-blog]

একটি RCC বীমের দৈর্ঘ্য 7m এবং উহার Cross-Section 250mm×550mm. বীমটিতে 2% Rod ব্যবহার করা হয়েছে। বীমটির জন্য প্রয়োজনীয় পাথর, বালি, সিমেন্ট ও লোহার পরিমাণ নির্ণয়

✪ একটি RCC বীমের দৈর্ঘ্য 7m এবং উহার Cross-Section 250mm×550mm. বীমটিতে 2% Rod ব্যবহার করা হয়েছে । বীমটির জন্য প্রয়োজনীয় পাথর , বালি ,...

একটি RCC বীমের দৈর্ঘ্য 7m এবং উহার Cross-Section 250mm×550mm. বীমটিতে 2% Rod ব্যবহার করা হয়েছে। বীমটির জন্য প্রয়োজনীয় পাথর, বালি, সিমেন্ট ও লোহার পরিমাণ নির্ণয় কর।

See and Download Answer as PDF 

[bimoutsourcing]

In this construction video tutorial, you will learn how to determine the bar bending schedule of beam through step-by-step processes.

Bar Bending Schedule is very important for determining the quantities of the reinforcement necessary for the building by arranging rebars for each structural unit.

Bar bending schedule demonstrates the reinforcement calculation toward reinforced concrete beam. It contains the details of reinforcement cutting length, type of bends and bend length.

The following items are included in BBS of beam :-

a. Recognition of member b. Bar Mark c. Type of steel d. Diameter of bar

e. Length of a single bar

f. Number of members g. Number of bars in each member h. Total number of bars i. Total length

j. Shape code

k. The dimensions of bending

To learn the step-by-step process, go through the following construction video tutorial.

[dearkulkarni]

Bending moment in over reinforced Beam  How do I calculate the bending moment in over-reinforced beams? by Santosh Kulkarni

[constructionfeeds-blog]

This civil engineering article is totally based on the complete BBS calculation for RCC beam

Bar bending schedule offers the reinforcement calculation for reinforced concrete beam. It offers 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.

Instance 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 in the last figure.

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

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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:

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:

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