Span calculator for wood joists and rafters also available for the android os.
Wood floor joist span table.
Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.
Floor joist span calculator.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Floor joist span tables for various sizes and species of wood.
Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.
Limited to span in inches divided by 360.
Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.
View joist rafter tables.
Designing with wood beam span tables.
Deflection for 30 psf live load.