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Shear Reinforcement Design

Structural IS 456:2000~2 min

Design shear stirrups for RCC beams as per IS 456:2000 Clause 40.

Formula

Sv = 0.87 × fy × Asv × d / (Vu - τc × b × d)

Input Parameters

From IS 456 Table 19

Results

Nominal Shear Stress (τv)
1.449N/mm²
Shear taken by stirrups (Vus)
85.83kN
Stirrup Area (Asv, 2-legged)
101mm²
Stirrup Spacing (Sv)
229mm

Step-by-Step Method

  1. 1Calculate nominal shear stress τv = Vu / (b × d).
  2. 2Compare with permissible shear stress τc from IS 456 Table 19.
  3. 3If τv > τc, design stirrups: Sv = 0.87 fy Asv d / Vus.
  4. 4Check maximum spacing: 0.75d or 300 mm (whichever is less).

Engineering Notes

  • •Maximum stirrup spacing = 0.75d or 300 mm (IS 456 Cl. 26.5.1.5).
  • •Minimum stirrups required even if τv < τc.

Code Reference

IS 456:2000

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