For heavy roofs or in.
2 x 6 roof joist span.
It covers 2 common lumber species and sizes at 20 pounds per square foot load.
An syp 2 6 rafter at 24 o c.
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.
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.
Although 2 x 4 s are included in the official table they are not listed because it is never advised to use them.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
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 6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build.
Also available for the android os.
Span calculator for wood joists and rafters also available for the android os.
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.
Span length for 2 6 rafters.
1 ft 0 3048 m.
Another option are 2 x 8 rafters spaced 24 inches o c.
Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.
1 psf lb f ft 2 47 88 n m 2.
Live load is weight of furniture wind snow and more.
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.
Maximum rafter spans for a patio roof.
Can span up to 13 4.
Trus joist tji joist specifier s guide tj 4000 july 2019.
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.
2 x 12 s are not listed because you can span pretty much whatever you want.
2 are indicated below.
