ACI Beam Detailing Helper (Figure 5)

ACI Beam Detailing — Figure 5 Helper

L₁ — first clear span (mm)

L₂ — second clear span (mm)

D — overall depth of beam (mm)

d — effective depth (mm)

dᵇ — main bar diameter (mm)

dᵗ — stirrup bar diameter (mm)

S₁ — chosen stirrup spacing in confinement zones (mm)

S₂ — chosen stirrup spacing in central zones (mm)

C — column size along beam (mm)

Lₕ — standard 90° hook length (mm)

All distances and spacings in millimetres.
Spacing checks use ACI style limits: S₁≤min(d/4, 8dᵇ, 24dᵗ, 300), S₂≤min(d/2, 24dᵗ, 300).
For the 90° hook, input your chosen standard length Lₕ (for example ≈ 12 × dᵇ).

Detail Summary

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