Rafter Lengths And Roof Construction

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.

Rafter lengths and roof construction.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Roof pitch calculator results explained. 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. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Allow for ridge thickness when determining rafter run to outer wall. Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful. The length of the rafter.

Height of the scaffold. The roof rafters provide integral structural support to the roof. 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. Includes result for hip valley factor slope factor and the roof slope in degrees.

Using this handy online tool you will have an easy way to determine and figure out the specific rafters needed for the unique slope and dimensions of your roof. The layout of your home or building will have a significant impact on the final design and slope of your roof. 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. The run of the rafter.

Half building width minus 1 2 ridge thickness. The rise of the rafter. See rafter run to outer wall calculator below. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Enter the value for the roof width outside to outside in feet inches and fraction inches and fraction or use the inches box to enter a value in decimals if that is your preference. Conclusions about the roof rafter length calculator.