Joist Span Calculator by Species
Joist span by species only works after the species and grade are translated into adjusted E, Fb and Fv design values. The working calculator screens those values directly.
joist span calculator by species joist span calculator by spacing and species deck joist span by species
Line load from spacing
w = (q_live + q_dead) * spacing
Bending span screen
M = w * L^2 / 8
Species caution
Species and grade are not a single number. Use adjusted design values for the adopted design edition, size, treatment, wet service, duration and local requirements.
Related pages
- Deck joist span calculator - live joist span screen from entered design values.
- Wood beam span calculator - general uniform-load wood member span screen.
- Deck beam span calculator - carry joist reactions into deck beams.
- Deck footing size calculator - support-load and soil-bearing follow-up.