Beams and Columns

Deflection and stress in beams and columns, moment of inertia, section modulus and technical information.

Parameter	Symbol	Unit	Description
Moment of Inertia	I	mm⁴ or in⁴	Resistance to bending deflection
Section Modulus	S	mm³ or in³	Measure of beam strength in bending
Bending Stress	σ	MPa or psi	Maximum stress in outer fiber
Deflection	δ	mm or in	Maximum displacement under load
Young's Modulus	E	GPa or psi	Material stiffness property
Applied Load	P	N or lbf	Force applied to beam or column
Span Length	L	mm or in	Distance between supports
Compressive Strength	Fc	MPa or psi	Maximum compressive stress capacity