How to Calculate Cutting Length of Rectangular Stirrups

📘 Explanation (Step by Step)

1️⃣ Formula for Cutting Length of Rectangular Stirrups CL=2(L+B)+(HookLength×2)–(BendDeduction)CL = 2 (L + B) + (Hook Length × 2) – (Bend Deduction)CL=2(L+B)+(HookLength×2)–(BendDeduction)

Where:

• L = Clear length (inside dimension of stirrup)
• B = Clear breadth (inside dimension)
• Hook Length = usually 10d (10 × diameter of bar) each side
• Bend Deduction = for every 90° bend ≈ 2d

2️⃣ Easy Method (Thumb Rule)

👉 Cutting Length = 2 (L + B) + 24d – 6d

• 24d24d24d = two hooks (12d + 12d)
• 6d6d6d = deduction for 4 bends (2d + 2d + 2d)

So, CL=2(L+B)+18dCL = 2 (L + B) + 18dCL=2(L+B)+18d

3️⃣ Example
Rectangular stirrup: 250 mm × 200 mm, bar dia = 8 mm CL=2(250+200)+18×8CL = 2 (250 + 200) + 18 × 8CL=2(250+200)+18×8 CL=2(450)+144=900+144=1044mmCL = 2 (450) + 144 = 900 + 144 = 1044 mmCL=2(450)+144=900+144=1044mm

✅ Cutting length = 1.044 m

Muhammad Bilal
Muhammad Bilal is a Civil Engineer and Construction Specialist with an MS in Engineering Management and 13+ years of professional experience. He shares practical construction knowledge, cost estimation, and RCC site expertise at CivilConstructionGuide.com.