Use this construction calculation for preliminary quantity, geometry, material, load, or coverage planning when dimensions and units have been measured consistently.

Effective buckling length (m)

Required number input.

Radius of gyration (m)

Required number input.

Calculate dimensionless column slenderness from effective buckling length and radius of gyration about the chosen axis. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Slenderness ratio

The resulting slenderness ratio returned as a number.

• The structural relationship assumes the stated support, section, material, and load model. Connections, lateral stability, buckling, shear, vibration, fire, durability, load combinations, and code factors require a complete design check.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Verify dimensions on site, use current product data and local code requirements, include an explicit waste or safety allowance where appropriate, and obtain qualified structural, electrical, plumbing, or geotechnical review when required.

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