Dead load weight of structure and fixed loads 15 lbs ft 2.
Maximum span 2x6 roof rafter.
1 ft 0 3048 m.
Span calculator for wood joists and rafters also available for the android os.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Can span up to 13 4.
Live load is weight of furniture wind snow and more.
These numbers are for roofs supporting light loads of 20 pounds for square foot.
1 psf lb f ft 2 47 88 n m 2.
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.
While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.
That means it can span a total length of over 26 for a gable roof.
Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.
2 are indicated below.
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.
Maximum rafter span of 16 feet.
This table is simply a sample and may not be valid for your region.
Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.
An syp 2 6 rafter at 24 o c.
Also available for the android os.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter.
