1 psf lb f ft 2 47 88 n m 2.
2 x 6 roof joist span.
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.
Span length for 2 6 rafters.
In making your choice consider how you will insulate your insulate your roof.
Span calculator for wood joists and rafters also available for the android os.
2 x 12 s are not listed because you can span pretty much whatever you want.
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 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.
This ceiling joist span table is based on the 2012 irc for uninhabitable attics with limited storage.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
Fire safe construction 3 floor performance and tj pro rating 4 5 section 1.
It covers 2 common lumber species and sizes at 20 pounds per square foot load.
Can span up to 13 4.
Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.
For example the highlighted cell below shows that a 2 x 6 southern yellow pine joist with a grade of 2 and spaced 24 apart can have a maximum span of 10 feet 0 inches 10 0 if you are designing your structure to support a plaster ceiling.
Although 2 x 4 s are included in the official table they are not listed because it is never advised to use them.
Live load is weight of furniture wind snow and more.
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.
2 are indicated below.
Also available for the android os.
For heavy roofs or in.
Another option are 2 x 8 rafters spaced 24 inches o c.
1 ft 0 3048 m.
Maximum rafter spans for a patio roof.
2 6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build.
9 16 tji joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing.
