Designing with wood beam span tables.
Wood floor joist span table.
Span tables for jois ts and rafters american wood council 4 span tables for joists and rafters american wood council design criteria.
Also available for the android os.
View joist rafter tables.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
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.
To use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list.
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.
Span calculator for wood joists and rafters also available for the android os.
Strength live load of 30 psf plus dead load of 10 psf determines the required bending design value.
Deflection for 30 psf live load.
Floor joist span calculator.
Limited to span in inches divided by 360.