How To Find BBS For The Circular Column
In this article i will find the bar bending schedule for the circular column. Bar bending schedule is also called BBS. in the BBS we will explain all detail about the rebar or steel which is using in circular column and also calculate the weight of steel and diameter meter of steel and also explain the design of fixing the steel in the circular column like fixing the lateral ties verticals bar number of bar etc. How To Find BBS For The Circular Column
What is the BBS in circular column?
BBS of the circular column is that the calculation of steel which is using the column or circular column. all detail is explain in the BBS. The full form of the BBS is that the bar bending schedule. In the bar bending we will find the cutting length of the steel diameter of the fixing of steel design of fixing of the steel and weight of the steel in the column.
What Is The Circular Column?
which column is the shape of like circle is called circular column. The circular column is uses of bridge as pile and also uses of support of structures. in the circular column use the steel ring in the circular shape that the name of lateral ties.

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How To Find BBS For The Circular Column
Now we find the bar bending schedule for circular column by given data. given data is just for method of learning that is some data is reals standard. we calculate the BBS of circular column with the help of this data is mentioned below.
Given data
The Diameter of the Circular Column =450mm=0.450m
The height of the circular ColumnÂ =3000mm=3m
The Diameter of the vertical straight bar = 20mm
The Numbers of the vertical straight bar = 12 no’s
The diameter of the Circular ring or Lateral ties = 10mm
The concrete cover of the circular column for all sides = 25mm
The spacing Between lateral ties of Circular Column = 150mm
Now we Calculate The Detail For BBS
Cutting Length of Verticals BarÂ Â
The Cutting length of The vertical bar = Total Height of Column +Duck leg length 2bends
Duck leg length = 16d (16 x 20 = 320mm
2bends = 2d = 2 x 20 = 40mm
The Cutting length of The vertical bar = 3000 + 320 – 40 = 3280mm=3.280m
Total length of the vertical bar = Total numbers of the vertical bar x cutting length of bar
we KnowÂ
The Number of the Vertical bar = 12 no’s
Total length of the vertical bar = 12 x 3.280 =39.360mm=39.360m
The Total Weight of the vertical bar
The Total Weight of the vertical bar = DÂ˛/162 x The Total Length of vertical bar
The Total Weight of the vertical bar = 20Â˛/162 x 39.360 = 97.18 =98kg
The Cutting Length of the lateral Ties
To find the cutting the length of the lateral ties 1st Calculate the Numbers of lateral ties
The diameter of the lateral ties = 10mm
The Number of the lateral TiesÂ
The Number of the lateral ties= Total height of the circular column/spacing between ties +1
The Number of the lateral ties= 3000/150 + 1 =21no’s
NOW Calculate the Cutting length of lateral tiesÂ
The Cutting Length of the lateral Ties = Î D + 2 x 10d – 2 x3d
Î = 3.14
D =Â Diameter of the lateral ties center to center of the lateral ties
so
D = diameter of the column – 2 concrete cover diameter of the lateral ties
D =5002 x25 10 =50060=440mm=0.440m
d = diameter of the lateral ties = 10mm
The Cutting Length of the lateral Ties = Î D + 2 x 10d – 2 x3d
The Cutting Length of the lateral Ties = Î x 440 +2(10x 10)2(3×10)
The Cutting Length of the lateral Ties = Î x 440 +200 60 = 1522mm=1.522mÂ
The Total length of the lateral ties
The Total length of the lateral ties = Cutting length of the lateral ties x Number of the ties
The Total length of the lateral ties =21 x 1522 = 31962mm=31.962m
The Weight of the lateral ties
The Weight of the lateral ties = DÂ˛/162 x Total length of the lateral ties
The Weight of the lateral ties = 10Â˛/162 x 31.962 = 19.72=20kg
How To Find BBS For The Circular Column 

s.no 
Types of The barÂ 
Dia of the bar (mm) 
Numbers of the barÂ 
Length of the barÂ (m) 
Total length of the barÂ (m) 
Total weight of all Bar (kg) 
Weight Formula (kg) 

1  The vertical Straight bar  20  12  3.28  39.360  Â 98  (w=d2/162 x Total length  
2  The lateral ties / Ring  10  21  1.522  31.962  Â 20 
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