Quick Beam

Fast single-beam shear, bending-moment and deflection calculator with a draggable beam elevation. Place pin, roller and fixed supports anywhere along one span (including overhangs, cantilevers, and multi-span continuous beams), add point loads, uniformly distributed loads, and trapezoidal (linearly varying) loads by typing exact values or dragging them on the canvas. Solves with a first-order elastic Euler-Bernoulli direct-stiffness model (2 DOF per node); internal shear and moment are recovered by statics from the computed reactions so the diagrams are exact for statically determinate and indeterminate layouts alike.

Reports support reactions (and fixed-end moments), peak sagging/hogging moment, peak shear, maximum deflection and span/deflection ratio, and renders live shear, bending-moment and deflection diagrams. Deflection uses an engineer-entered prismatic E and I. CSV and print/PDF export.

Analysis aid only, not a member design check. First-order elastic analysis with no load factors, load combinations, member capacity, lateral-torsional buckling, shear/web stability, axial-flexure interaction, second-order effects, or serviceability code limits. Assumes a prismatic, linearly elastic section with the entered E and I; no shear deformation.

Single beam only (no frames or moment connections between members). All results require independent engineer verification.

Use for quick statics - reactions, shear and moment envelopes, and deflection screening - then run member adequacy through the appropriate design tool. Confirm the support model and load cases and obtain engineer sign-off before design use.