A floor bends under every footstep, and the bending travels through beams, columns and foundations into soil that settles and pushes back — run on the page: forces, loads, stress and strain; trusses, beams, frames, columns, arches and cables, vibration and finite elements; steel, concrete, timber and masonry; soils, foundations, slopes and tunnels; buildings, bridges and dams; wind, earthquakes, fire and the failures that taught the rules; water, roads, construction and carbon. Load a beam, buckle a column, shake a building and slip a slope — every number computed by the page.
Every curve and number on these pages is computed by the page or cited with its source; your progress stays in this browser. Never remove, cut or drill a wall, beam, column or slab, dig beside a building or overload a floor: nothing here asks you to, and a crack or damaged building is a matter for a qualified engineer. The code checks are teaching versions, not designs. The course gives no engineering, legal, insurance or investment advice and names no product. Not affiliated with or endorsed by any organisation, manufacturer, publisher or author mentioned here.