STEEL CALCULATION SHORTCUTS 🏗️🔩 🌟Save this useful Steel… — Ethiopian Construction Vacancy & Tender

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👉STEEL CALCULATION SHORTCUTS 🏗️🔩

🌟Save this useful Steel Calculation Shortcuts guide for quick estimation and reinforcement calculations on site.

📌 1. Steel Weight Formula
Weight (kg) = D² / 162 × Length (m)
Where D = bar diameter in mm.

📌 2. Quick Unit Weight Table
Common bar weights:
8 mm = 0.395 kg/m
10 mm = 0.617 kg/m
12 mm = 0.89 kg/m
16 mm = 1.58 kg/m
20 mm = 2.47 kg/m
25 mm = 3.86 kg/m
32 mm = 6.32 kg/m

📌 3. Number of Bars
No. of Bars = (Width ÷ Spacing) + 1

📌 4. Lap Length Shortcut (RCC)
Tension Lap ≈ 50D
Compression Lap ≈ 40D

📌 5. Development Length
Ld ≈ 40D to 50D
Depending on steel grade and design code.

📌 6. Approximate Steel Quantity
Slab: 0.8–1% of concrete volume
Beam: 1–2% of concrete volume
Column: 1–3% of concrete volume

📌 7. Bar Bending Allowance
45° Bend = 1D
90° Bend = 2D
180° Hook = 9D

📌 8. Bundle Weight
Bundle Weight = Number of Bars × Length × Unit Weight

💡 Remember: D² ÷ 162 is the fastest shortcut for calculating steel weight per metre.

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