This calculator helps you make the rafters of the suitable sizes required for your roofing.
Rafter spans shed roof.
Span calculator for wood joists and rafters also available for the android os.
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.
If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and.
Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no.
An syp 2 6 rafter at 24 o c.
Rafter is a sloping beam usually wood that supports a pitched roof.
1 psf lb f ft 2 47 88 n m 2.
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.
Use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle.
For instance 2 grade 2x4s at 16 on center will span just over 9.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
Also available for the android os.
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.
For standard shed roof rafter spacing see rafter span chart.
The 1 grade.
Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
Dead load weight of structure and fixed loads 15 lbs ft 2.
1 ft 0 3048 m.
Span length for 2 6 rafters.
Live load is weight of furniture wind snow and more.
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.
The lengths and sizes of joists vary depending on the species and quality of the lumber used.
Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
Wood beam calculator american wood council website rafter and joist span faq.
There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.
