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.

Rafter lengths and roof construction.

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Includes result for hip valley factor slope factor and the roof slope in degrees. The length of the rafter. 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.

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. The run of the rafter. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. The roof rafters provide integral structural support to the roof.

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

Roof pitch calculator results explained. The rise of the rafter. Height of the scaffold. 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.

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. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful. Half building width minus 1 2 ridge thickness.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Angle the angle of a roof is the same as the roof s slope except instead of being. See rafter run to outer wall calculator below. Allow for ridge thickness when determining rafter run to outer wall.