How to calculate cutting length of Circular Stirrup bar
How to calculate cutting Length for Circular Stirrups
bar given below detailed explanation:
or your better understanding,
Let’s take this example
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
Note: Bend Criteria
1d at 45° bends
2d at 90° bends
3d at 135° bends
Perimeter of Circle = 2𝞹r.
r1 = D1/2
Cutting Length Formula
Cutting length = 2𝞹 r1 + 2 x Hook length – 2 (90° bends), Where d is diameter of stirrup bar.
Cutting length = 𝞹 D1 + 2 x 10d– 2 (2d)
Cutting length = 𝞹 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