Stirrup Cutting Length Calculator | Free BBS Course

STIRRUP CUTTING LENGTH

IS 2502 Based Accurate BBS Calculator with Proper Bend Deduction

Important Formula Concept

• All cutting lengths are measured along the centerline of reinforcement.
• Clear cover must always be deducted from overall dimensions.
• Standard Hook Length:
  • 90° Hook = 8D to 10D
  • 135° Hook = 10D to 12D
• Standard Bend Deduction:
  • 45° Bend = 1D
  • 90° Bend = 2D
  • 135° Bend = 3D
  • 180° Bend = 4D
• IS 2502 and SP-34 should be followed for accurate BBS preparation.

Rectangular Stirrup

CL = 2(x+y) + 2(Hook) − 6D

• x = Overall Width − 2 × Cover
• y = Overall Height − 2 × Cover
• 2 Hooks provided.
• 2 bends of 135° → Deduction = 6D

Circular Stirrup

CL = 2πr + 2(Hook) − 6D

• r = (Diameter ÷ 2) − Cover
• 2 Hooks provided.
• 2 bends of 135° → Deduction = 6D

Triangular Stirrup

CL = (2S+x) + 2(Hook) − 9D

• S = √[(x/2)² + H²]
• 3 bends of 135° → Deduction = 9D
• Used in special RCC detailing.

Diamond Stirrup

CL = 4S + 2(Hook) − 12D

• S = √[(x/2)² + (y/2)²]
• 4 bends of 135° → Deduction = 12D
• Used in seismic detailing.

Accurate Stirrup Cutting Length Calculator

Select Stirrup Type Rectangular Stirrup Circular Stirrup Triangular Stirrup Diamond Stirrup

Overall Width X (mm)

Overall Height Y (mm)

Clear Cover (mm) Bar Diameter D (mm) Hook Length Type 10D Hook 12D Hook

Calculation Result

Bend Deduction Table

Bend Angle	Bend Deduction
45°	1D
90°	2D
135°	3D
180°	4D

Developed By

Mohan Dangi (Gold Medalist)