Joist and rafter span tables.
Wood roof joist span tables.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that 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.
These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center.
Straight line interpolation shall be permitted for intermediate spans and design values.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
View joist rafter tables.
Floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21 framing connectors 22 23 section 3.
Span calculator for wood joists and rafters also available for the android os.
Design information for all joists tji joist floor framing 24 rim board selection and installation 25 floor details 26 27 roof framing 28 roof details 29 30 cut length calculation 31 material weights and.
Also available for the android os.