Rafter Lengths And Roof Construction

The layout of your home or building will have a significant impact on the final design and slope of your roof.

Rafter lengths and roof construction.

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 run of the rafter. Half building width minus 1 2 ridge thickness. Angle the angle of a roof is the same as the roof s slope except instead of being.

Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful. The roof rafters provide integral structural support to the roof. See rafter run to outer wall calculator below. 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.

Allow for ridge thickness when determining rafter run to outer wall. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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. The length of the rafter.

Roof pitch calculator results explained. 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. Pitched roof rafter lengths for gable hip lean to roof construction how to calculate the length of common roof rafters you are ready to set out and cut the common rafter lengths as soon as the wall plates have been squared levelled and fixed strapped down onto the brickwork. Height of the scaffold.

If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Conclusions about the roof rafter length calculator. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through.

Includes result for hip valley factor slope factor and the roof slope in degrees. The rise of the rafter. 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. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.