View joist rafter tables.
Floor joist span chart.
Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.
The table has two column sections one for joists without a cantilever and one for joists with a cantilever.
When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started.
While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length.
This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
Floor joist span tables for various sizes and species of wood.
1 ft 0 3048 m.
Sample floor joist span table.
Dead load weight of structure and fixed loads 10 lbs ft 2.
The spans are based on simple span joists.
Of bearings and is based on uniformly loaded joists.
Joist span and spacing is set by your local building code.
Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
True floor joist span calculations can only be made by a structural engineer or contractor.
The maximum span is measured o c.
The floor joist spacing is the distance between the centers.
Maximum floor joist span for no.
The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel.
The table excerpt above is simply a sample and may not be valid for your region.
1 psf lb f ft 2 47 88 n m 2.
Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
2 grade of douglas fir are indicated below.
Live load is weight of furniture wind snow and more.
Span calculator for wood joists and rafters also available for the android os.
