Steel section design — classification, lateral-torsional buckling, axial buckling and interaction checks per IS 800, AISC 360 and Eurocode 3.
Design rolled and built-up steel sections for flexure, axial, shear and combined loading. Section classification, lateral-torsional buckling (LTB), column buckling and beam-column interaction equations — all code-aware.
Plastic / compact / semi-compact / slender — determined from b/t ratios so you don't have to remember the limits.
Lateral-torsional buckling capacity computed with proper Cb / km factors instead of the conservative shortcut.
Combined axial + biaxial bending interaction with the correct second-order amplifier per code.
Pick from ISMB, ISWB, IPE, HE, W, HSS — the section properties database covers all three regions.
Search ISMB / IPE / W series; properties auto-populate. Or define a custom built-up section.
Lateral and torsional unbraced lengths for LTB; effective length factors for axial buckling.
Axial, major + minor moments, shear; combine via code-specified load combinations.
Pass / fail summary with the governing equation; PDF report ready for review.
Major-axis moment + axial — LTB is usually the governing check for unrestrained spans.
Pure axial with effective length depending on bracing — both major and minor axis buckling checked.
Continuous lateral restraint from the slab — LTB is suppressed, so flexure governs.
Hollow structural section with combined axial + biaxial bending; torsional checks where applicable.
Three engineering cases with the inputs and expected results. Open one to see exactly what to type into the calculator.
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