How to calculate the length of stirrups if circula column R6 @ 150 mm ??
Length of Stirrups
- Thread starter NORA SAID
- Start date
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- #calculation #column #stirrups
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
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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