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Maximum Floor Live Load Capacity Calculator

This calculator estimates the maximum live load a floor can support without excessive deflection or failure. It is based on span, stiffness, modulus of elasticity, and a correction factor. Engineers and architects use it to assess floor safety under dynamic loads like people, furniture, or equipment.

Calculate Maximum Live Load on Floor Structure

Input Fields
s
psi
h
in
k
pci
E
psi
If enabled, the result will update automatically when you change any value.

Live Load Capacity Formula

Formula
$$w = 257.876 \cdot s \cdot \sqrt{ \frac{k_h}{E} }$$

Where

  • $$w$$ β€” maximum floor live load
  • $$s$$ β€” span of the floor
  • $$k_h$$ β€” stiffness or floor constant (empirical)
  • $$E$$ β€” modulus of elasticity of the floor material


This empirical formula helps engineers validate whether a specific flooring design can sustain intended live loads. It’s particularly relevant for suspended floors in residential, commercial, and industrial buildings. Ensure units are consistent to get accurate results (e.g., kN/mΒ², psi, etc.).

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Floor Space Index (FSI)

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