// multi-utility computation suite · offline · instant · precise
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sci.steel-beam-plastic-moment-capacity Calculator
Calculates plastic moment capacity Mp = Fy × Z_p for a steel beam in full plasticity, where Z_p is the plastic section modulus. Mp/My = Z_p/S = shape factor — for an I-beam, shape factor ≈ 1.12; for a rectangle, 1.5 — plastic design allows 12–50% more capacity than elastic design.
Inputs
Fy Mpa
Stress at which permanent deformation begins. Design loads should stay below this — apply a safety factor of 1.5–3×.
Z Plastic Cm3
Reference formula or conversion factor shown for context.
Gamma M0
A multiplier applied in the calculation.
Results
plastic moment capacity Mpl,Rd (kN·m)
Sample size or count used in the calculation.
fy × Z (kN·cm)
Sample size or count used in the calculation.
Mpl = fy · Z / γM0
Reference formula or conversion factor shown for context.
elastic vs plastic
Reference formula or conversion factor shown for context.
cross-section class
The classification assigned based on the computed value.
application
Recommended use case or application for this configuration or result.