Calculating the Cutting Length Circular Stirrup
The cutting length of the circular stirrup is done by using simple and easy method. The rings or commonly known as ties are used to avoid the lateral deformation of the reinforcement while pouring the concrete in the column. The longitudinal bars in the column may change their position or alignment while pouring concrete and using a vibrator.
Here is a simple example given which will help to understand the calculation in a better way:
Suppose we are using a circular stirrup in a column and column having a radius of 600 mm (X-section) and the clear cover in the column will be 40 mm and the stirrup bar is going to use is 8 mm. Then, we have to 1) Calculate the cutting length of the circular stirrup and 2) Calculate the weight.
Dia of column or D: 600 mm
Clear Cover of Column: 40 mm
Dia of Bar: 8 mm
Dia of Stirrups C/C (d): D – (2 * Clear Cover) – Dia of Bar
d: 600 – (2 * 40) – 8
d: 512 mm
Peremeter of Stirrups: Pi * d= 3.142 * 512 = 1608.70
Hook Length = 2 * 10 d= 2 * (10*8) = 160 mm
Cutting Length of Stirrups = Peremeter of Stirrups + Hook Length = 1608.70 + 160 = 1768.70 mm = 1.77 mm
To get more details, watch the following video tutorial.