Joist Span Calculator
Typical residential SPF #2 spans (40 psf live + 10 psf dead).
About this tool
Joist Span Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Trade & Construction Calculators. Browse more Trade & Construction Calculators tools.