In this video, we are going to explain to you that how to prepare the Bar Bending Schedule for beam according to the drawing. after watching this video you will be able to learn the Bar Bending Schedule of Beam
The bar bending schedule for the beam is described below
This is the reinforcement detail of the Roof beam in this, the length of the beam is 3m center to center of the column as shown in the figure: the Roof beam is always connected from column to column, therefore the bars of the beam is interconnected with column vertical bars so that the load can be distributed easily.
To find out the bar bending schedule for the beam we need to cut one section as shown in the figure below
Now in this figure, we see that there are 6 bars, 3 bars at the top, and 3 bars at the bottom and each bar is of 12mm Diameter. And the length and width of the column is 400mm and 400mm respectively
Step 1. Finding out the cutting length of a straight bar.
Length of beam including both columns is 3m+0.2m+0.2m = 3.8m
The cutting length of the straight bar is 3.4m (- both side column’s covers)
Note: take column cover =40mm
Therefore cutting length of the straight bar is = (3.40-0.04-0.04)
= 3.32m
Step 2. Numbers of bars:
The number of bars in the beam is judged by seeing the section of the beam.
There are 6 numbers of straight bars in the Roof beam.
Step 3. Unit Weight:
The unit weight of the bar is calculated by the formula = D2/162
= 12 x12/162
=0.888kg/m
Step 4. Total weight:
The total weight of bars are= cutting length x Number of Bars x Unit Weight
= 3.32 x 6 x 0.888
= 17.68 kg weight
Finding out Cutting Length of Rings
The clear cover of Beam is 30mm
Formula to find cutting length of stirrup is = [2x (L+B)+ 20D]
Where D is the Diameter of Bar
L=Length of Ring (Cover is deducted from both side) = 340mm
B = Breadth of Ring (Cover is deducted from both side) = 240 mm
Note: both side cover should be subtracted from length and breadth.
Step1. Here L= 0.340m , B= 0.240m, and D= 8mm or 0.008m
So put these values in the formula = [2x (L+B)+ 20D]
= [2(0.340+0.240)+20x 0.008]
= 1.160+ 0.16
=1.32m Cutting Length of one Ring
Step 2: Number of Bars = (Length / Spacing)+ 1
Here length would be taken as the vertical length of the column where the rings are placed.
So. Number of bars = (5/ 0.15)+1
= 33.33+1
=34.33 say 34 numbers of rings
Step 3: unit weight of bars = D²/162
Here D =Diameter of Bar = 8mm
That is = 8×8/162=0.395 Kg /m
Step 4: Total weight of Bar = cutting length × no of Bars × unit wt
= 1.32 X 34 X 0.395
= 17.72 Kg weight.
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Awesome article.