// multi-utility computation suite · offline · instant · precise
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build.slab-thickness Calculator
Calculates minimum slab thickness for a given span and supported load, accounting for punching shear at column heads. Flat plate slabs require a minimum thickness of L/33 for deflection control — going thinner requires post-tensioning or deepened beams.
Inputs
Span
Distance between supports (m). Longer spans experience larger bending moments — structural adequacy must be rechecked.
Live Load
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
Fc Mpa
Reference formula or conversion factor shown for context.
Support
Reference formula or conversion factor shown for context.
Results
min slab thickness (mm)
Sample size or count used in the calculation.
self weight (kPa)
The computed weight (gravitational force) or mass.
factored load wu (kPa)
A dimensionless multiplier applied in the calculation.
design moment (kNm/m)
Sample size or count used in the calculation.
support type
The classification or type assigned based on the inputs.