A double 2x12 beam can span 12 feet.
Span distance for 2x6 cedar roof.
When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches.
2x6 9 9 2x8 12 10 2x10 16 1 2x12 18 10 2x6 8 6 2x8 11 0 2x10 13 1 2x12 15 5 maximum clear span for rafters w gypsum ceiling standard roof covering.
A 2x8 up to 12 feet.
Please request publication the u s span book for canadian lumber.
Patio roof maximum beam rafter spans what is max distance between posts pergola main beams span building span tables for 8 x12 x24 western red pergola beam span calculator.
2x4 10 0 2x6 14 9 2x8 18 9 2x10 22 2 2x4 8 2 2x6 13 6 2x8 17 2 2x10 20 3 2x12 24 1.
The lengths and sizes of joists vary depending on the species and quality of the lumber used.
Patio roof maximum beam rafter spans beamsmeasuring pergola dimensions learn the standardwhat is max distance between posts using 2x12x20 foot beams for apergola beam span calculator.
2x10 to 15 feet and 2x12 to 18 feet.
The larger the deck the larger the joists.
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.
For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine.
The numbers in gray indicate the distance between the support posts.
Rafter and joist span faq.
Spans for western red cedar dimension lumber used as joists and rafters in residential and commercial structures are available from the western red cedar lumber association the canadian wood council and the national association of home builders.
Span calculator for wood joists and rafters also available for the android os.
Also available for the android os.
In general terms joists spaced 16 inches on center can span 1 5 times in feet their depth in inches.
