Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.
Roof framing 2x6 spanns.
Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans.
Span calculator for wood joists and rafters also available for the android os.
Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.
Span length for 2 6 rafters 2 6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build.
2 are indicated below.
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.
Can span up to 13 4.
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.
If this calculator from the american wood council is to be believed and if my assumptions about your materials and load are correct the max span is about 10ft for a pine 2x6.
Dead load weight of structure and fixed loads 15 lbs ft 2.
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.
Live load is weight of furniture wind snow and more.
1 ft 0 3048 m.
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.
Looking through the center of the table we can find a couple of options.
Also available for the android os.
The span of a beam is dependent on a few variables.
Another option are 2 x 8 rafters spaced 24 inches o c.
1 psf lb f ft 2 47 88 n m 2.
An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry.
This table agrees that 10 12ft is the max span for typical grade lumber at typical spacings for a 5psf dead load.
Let s use this example and find a size of rafter that will work.
Beam span maximums are based on a maximum anticipated live load.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
For heavy roofs or in.
Maximum rafter spans for a patio roof.
