Live load represents the weight of furniture snow etc.
Wood floor joist span chart.
This chart is for basic reference only.
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.
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.
Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Floor joist span tables for various sizes and species of wood.
If you have any questions.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
View joist rafter tables.
Dead load is the weight of the structure and any fixed items.