📌 Key Points – Steel Calculation Shortcuts

✅ Steel Weight Formula: Weight = (D² ÷ 162) × Length (m)
✅ Unit weight table helps estimate TMT bar weight quickly.
✅ Number of Bars = (Width ÷ Spacing) + 1
✅ Lap Length: 50D (Tension), 40D (Compression)
✅ Development Length (Ld): 40D–50D (as per design/code).

✅ Steel Thumb Rule:

Slab: 0.8–1%

Beam: 1–2%

Column: 1–3% of concrete volume.

✅ Bending Allowance:

45° Bend = 1D

90° Bend = 2D

Hook = 9D

✅ TMT Bundle Weight = No. of Bars × Length × Unit Weight
✅ Always verify reinforcement details with structural drawings before execution.

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