Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in.
2 pine floor joist.
Effective june 1 2013.
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.
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.
2 in x 12 in x 18 ft.
Table 1 floor joists 30 psf live load 10 psf dead load 360 deflection.
These 46 tables are based upon design values for visually graded southern pine dimension lumber that became effective june 1 2013.
Recommended for most general construction projects including framing houses barns and sheds.
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.
Two species used for structural lumber include douglas fir and southern yellow pine.
Joist spacing common joist spacings for 2 by 10 joists and other dimensional lumber sizes are 12 16 and 24 inches.
Every piece of 2 in.
For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.
Made of southern yellow pine for strength machine ability and great fastener holding characteristics.
Joist span and spacing is set by your local building code.
True floor joist span calculations can only be made by a structural engineer or contractor.
Of visually graded southern pine dimension lumber maximum spans in feet inches.
This product is third party certified signifying sourcing from renewable and environmentally managed forests.
For southern pine.
For each application a pdf download is available.
Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.
1 5 in x 11 25 in x 18 ft.
Dense elect structural select structural nondense structural no 1 dense no 1 nondense no 2 dense.
1 5 in x 5 5 in x 10 ft recommended for most general construction projects including framing houses barns sheds furniture and hobbies used for structural framing of interior and exterior walls.
Tables listing maximum spans for southern pine joists and rafters are detailed below.
Kiln dried for dimensional stability.