NZS 3101 Concrete Design Portal

Quick access to NZS 3101:2006 based calculations for reinforced concrete design. Click any tool to open.

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Shear Capacity

Calculate Vc, Vs, and nominal shear capacity Vn for rectangular beam sections.

Clauses 7.5, 9.3.9
↻

Torsional Capacity

Pure and combined torsion capacity for rectangular sections.

Clauses 7.4, 9.4
▦

Punching Shear

Punching shear capacity for slab-column connections.

Clauses 7.10, 11.5
⊞

Min/Max Reinforcement

Check minimum and maximum reinforcement limits for beams and slabs.

Clauses 7.6.1, 7.6.2, 9.3.2
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Development Length

Calculate rebar development length and hooked bar anchorage per NZS 3101.

Clause 8.6
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Response Spectrum

Generate NZS 1170.5 response spectrum for seismic design.

NZS 1170.5 Clause 3.1
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Crack Width

Calculate flexural crack width for serviceability check.

Clauses 7.6.3, App. B

What's Included

  • Shear capacity (Vc, Vs, Vn)
  • Torsional capacity (Tc, Ts, Tn)
  • Punching shear at slab-column
  • Min/max reinforcement limits
  • Development length (straight & hooked)
  • Response spectrum (NZS 1170.5)
  • Crack width (serviceability)

References

  • NZS 3101:2006 (Part 1)
  • All calculations per code equations
  • Results are for quick checks
  • Verify with full design