Tool

Structural pre-sizing and checks in 22 calculations FREE

Indicative pre-sizing in 22 calculations (beams, slabs, walls, stairs, crawl spaces, NTC loads, window-to-floor ratio, escape routes), each with a rule-of-thumb formula and its Italian source standard. NTC 2018 is the Italian building code.

Indicative pre-sizing. It does not replace a structural calculation signed by a licensed engineer. For seismic zones with agS (design ground acceleration) > 0.15g, long spans or use classes III/IV → talk to a structural engineer.
Pick a calculation from the list to start.
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