Roof Pitch Rafter Length Formula

While making roofing for your house with the roof rafters it is important to know the rafter length to make the roof seat perfectly on the rafter.

Roof pitch rafter length formula.

Click the button to calculate the stock size needed for this job. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12. Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. For example a rafter installed at a 4 12 pitch rises 4 feet for every 12 feet from an outside wall. 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. This calculator is to be used as an estimating tool only.

The results are automatically fired. Contemporary houses often have flat roofs which shouldn. The run of the rafter. Once you ve measured the run of a rafter simply look up the right table in the ready reckoner for your roof pitch angle and using the measurements relevant to the span of the wall plates it tells you everything from all the common rafter lengths plumb and seat angles to the length of the hips the jack rafter cuts and several others are.

The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. There is no standard universal roof pitch roof pitch varies depending on culture climate style and available materials in the usa the range of standard pitches is anywhere between 4 12 and 9 12 in the uk the typical house has a pitch between 40 50 although 45 should be avoided. Input the rafter span on the flat eave overhang and pitch of the roof. Roof pitch is designated by a set of numbers such as 4 12 or 6 12.

Area span on the flat please enter area span on the flat in foot. Includes result for hip valley factor slope factor and the roof slope in degrees. Height of the scaffold. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually.

The first number represent the amount in feet that a rafter rises. Calculate the length of common rafters with this free and easy online tool by entering a dimension for the roof width selecting a pitch for the roof and the thickness of the ridge. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. What is the standard pitch for a roof.

The length of the rafter. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. The second number is the benchmark for typical pitched roof calculations.