Answered Length of Stirrups

amd007

Senior Member
Premium Member
Apr 17, 2018
79
116
mumbai
Assume diameter of column at 400 mm

Clear cover 40mm also add half dia of bar of stirrups to get effective cover. ( say dia of bar is 10 mm then effective cover would be 40 +5=45 mm)

Stirrups bar dia assumed as 10 mm

For hook consider 10d or 75mm whichever is higher.

In circular stirrups degree of bend is considered at 135 degree. so bend = 3d

Formula:

Cutting length of stirrup = Circumference of stirrup + 2 nos of hook - 2 nos of 135-degree bend

The circumference of stirrups =2 pi R

Diameter assumed = 400 mm

Radius (r) = d/2 = 400/2=200mm

Radius of stirrups = 200 - 45 =155mm

So now lets calculate : (2 x 3.14 x 155) + (2 x 10 x 10) - ( 2 x 3 x 10) = 973.40 + 200 - 60 = 1113.40 mm


So for a column of 400mm dia the cutting length of stirrup in the above case is 1113.40 mm say 1.11 meter

Attached pls find calculator
 

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NORA SAID

Newbie
Mar 8, 2019
7
3
Oman
Assume diameter of column at 400 mm

Clear cover 40mm also add half dia of bar of stirrups to get effective cover. ( say dia of bar is 10 mm then effective cover would be 40 +5=45 mm)

Stirrups bar dia assumed as 10 mm

For hook consider 10d or 75mm whichever is higher.

In circular stirrups degree of bend is considered at 135 degree. so bend = 3d

Formula:

Cutting length of stirrup = Circumference of stirrup + 2 nos of hook - 2 nos of 135-degree bend

The circumference of stirrups =2 pi R

Diameter assumed = 400 mm

Radius (r) = d/2 = 400/2=200mm

Radius of stirrups = 200 - 45 =155mm

So now lets calculate : (2 x 3.14 x 155) + (2 x 10 x 10) - ( 2 x 3 x 10) = 973.40 + 200 - 60 = 1113.40 mm


So for a column of 400mm dia the cutting length of stirrup in the above case is 1113.40 mm say 1.11 meter

Attached pls find calculator
Thank Sir for helping
 
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