How to calculate cutting length of Circular Stirrup bar

How to calculate cutting Length for Circular Stirrups


Calculation of Cutting Length for Circular Stirrup
 bar given below detailed explanation:

or your better understanding,
Let’s take this example 








                          
                                                                                                                                             Fig.

Given data

Diameter of Circular column = 900 mm

Clear cover = 40 mm
Diameter of the stirrup bar = 10 mm
Calculate cutting length of stirrup =?                                                              
                                                                                                                                                                                                                                                                                                                           
                                                                                                                                      
First we calculate the length of the stirrup bar and then we add the hooks length and at the last we subtract the bend length in the stirrup

NoteBend Criteria
1d at 45° bends
2d at 90° bends
3d at 135° bends
Perimeter of Circle = 2๐žนr.
r1 = D1/2

Cutting Length Formula

Cutting length = 2๐žน r1 + 2 x Hook length – 2 (90° bends), Where d is diameter of stirrup bar.
Cutting length = ๐žน D1 + 2 x 10d– 2 (2d)
Cutting length = ๐žน x (D – 2 x clear cover -2x half stirrup dia.)+ 2 x 10 x 10 – 2 (2 x 10).
Cutting length = 3.141 x (`900 – 2 x 40-2 x 10/2) + 2 x 10 x 10 – 2 (2 x 10).
Cutting length = 2704.21mm
                          =2704.21/1000 = 2.704 m
                                                                   









Excel Sheet download link

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