Engineering Tools
Stop guessing. These calculators map directly to IBC tables and industry-standard waste factors. Built for field use.
Structural
Load Bearing Span
Calculate maximum allowable spans for dimensional lumber floor joists based on species, grade, and spacing.
Open Tool EstimatingConcrete Volume
Determine precise cubic yardage required for slabs and footings, including 10% waste factors.
Open Tool LayoutStair Stringer Layout
Calculate exact rise, run, and stringer length based on total elevation change to meet 7-11 rules.
Open Tool LayoutRoof Pitch Multiplier
Convert plan view square footage to actual roof area square footage for material ordering.
Open Tool