trevato/beam

Public: anyone can read this; the crew can change it.

A structural beam calculator for engineers: a simply-supported or cantilever beam with a span, point and distributed loads, and a section (rectangular or an I-beam from a small table); it draws shear, moment and deflection diagrams as SVG, reports maxima with units (SI and imperial, switchable), keeps every case in a shareable URL, and prints cleanly. Results must match hand calculations in the tests.