Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.
2x6 roof rafter span chart.
Span calculator for wood joists and rafters also available for the android os.
Building pergola with two rows of 3 posts.
While a 2 6 might be nearly double the cost of a 2 4 you can likely space the 2x6s further apart negating the added expense of increasing your lumber width.
2 6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build.
In making your choice consider how you will insulate your insulate your roof.
Roof rafter 2x ridge beam 2 16d toenail face nail 2 planks 16d at each plank 2x6 2x8 2x10 2x12 rafter size spacing allowable span allowable spans for df 2 floor joists df larch table 2308.
The table states that 2 x 6 rafters spaced 16 inches on center o c can span a maximum distance of 13 feet 5 inches.
Another option are 2 x 8 rafters spaced 24 inches o c.
An syp 2 6 rafter at 24 o c.
Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.
4 for panel maximum span shall be 24 5 24 o.
Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.
Can span up to 13 4.