# How to figure out the length of the cut on a circular stirrup

Determine the circular stirrup’s cutting length using the drawing below.

## Give Data

D = 450mm for the circular column’s diameter

40mm for clear covers.

The stirrup’s diameter is 8 mm.

**The cutting length of the circular stirrup **

= [2r + (2no) hook length – (2no) hook bend]

= [2r + [2nos. 10d] – [2nos. 2d

ere,

The stirrup diameter is given by d.

R is the diameter of the circular stirrup’s centerline (as depicted in the drawing).

First, using the provided data, we will calculate the r value.

r is equal to [(1/2 column diameter) – clear cover – (1/2 stirrup bar diameter)]

The formula for r is [(1/2 450mm) – 40mm – (1/2 8mm)]

225mm – 40mm – 4mm = r

**r = 181mm.**

**The cutting length of the circular stirrup**

equals [(2 181mm) + (2nos 10d) – (2nos. 2d]

= [(2 3.142 181 mm) + (2 nos. 10 mm) – (2 nos. 2 mm)]

= [1137.4 mm plus 160 mm minus 32 mm]

= 1265.404mm

= 1.265m.

**Different Shapes of Stirrups**

**Rectangular Stirrups****Square Stirrups****Circular Stirrups – Also read: Calculator for circular stirrups****Triangular Stirrups****Spiral Stirrups****Diamond Stirrups**

**Types Of Stirrups Used In Beam And Columns**

**Single Legged Stirrups(Open stirrup)****Two-legged or Double Legged Stirrups (Closed Stirrup)****Four-legged Stirrups (Closed Stirrup)****6-legged Stirrups (Closed Stirrup)**

**Steps involved in finding the cutting length of stirrups**

- Look at the size of the column or beam from drawings.
- Adopt Dia of the bar (generally 8mm Dia is used for stirrups.
- Deduct the concrete cover or clear cover.
- Find the total outer length of the stirrup after deducting concrete cover.
- Add the length of the hook to the length of the stirrup.
- Deduct the length of bends.
- Use the below formula to find the total cutting length of stirrups.

**Cutting Length of Stirrups = Perimeter of Shape + Total hook length – Total Bend Length**

**PERIMETER OF SHAPE**

(Length + Breadth)2 = the rectangle’s perimeter

A square perimeter equals four times the length of its sides.

Circle’s circumference, also known as its perimeter, is equal to its diameter times its radius, or r.

**TOTAL HOOK LENGTH**

1 the Hook length = 9d or 75mm

**TOTAL BEND LENGTH**

45° Bend length equals 1d

90° Bend length = 2d

135° degrees Bend length is equal to 3d,

where d is the bar’s diameter