Standard Long Span Roof Size

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.

Standard long span roof size.

Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20 construction or rain not snow load 55 1 15 40 snow. Click the button to calculate the stock size needed for this job. Input the rafter span on the flat eave overhang and pitch of the roof. The width is measured simply straight across the top of.

Rafter stock size calculator. Total width is 1110 mm or 43 7 10 inches but its effective width upon installation is 1050 41 11 32 inches. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. This calculator is to be used as an estimating tool only.

Also available for the android os. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. Again this length can be adjusted to fit the need of the truss. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Length and width standard lengths for corrugated roofing are 8 10 and 12 feet. 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. Span calculator for wood joists and rafters also available for the android os. Next you will need to use a roofing materials calculator.

We provide 20 for you about length and width of long span aluminium roofing sheets page 1. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Looking for length and width of long span aluminium roofing sheets. Long span roof specifications roof length will depend on your request while width is shown in the illustration below.

Span configuration and load conditions. If the overhang extends beyond 24 inches say to 30 inches then a 2 6 top chord for the tail section will be required to handle the additional overhang. Check that your footage measurements are within this range so you can start off on the right foot. Long span rib roof colors.