10 Pitch Roof Run

The combination of two numbers are used to display or show the roof pitch.

10 pitch roof run.

Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. The rise is the distance from the top of the roof to the bottom. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The run is the distance from the outside of the wall to the inside of the ridge.

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 pitch of this roof is 4 8 12. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

As aforementioned there is no standard pitch of a roof. See the image below for more explanation on rise run and pitch. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch.

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. The triangle diagram will be re drawn to scale with all dimensions marked. Drag sliders to animate the results and diagram. Here is an online rise and run calculator which helps to calculate pitch slope and angle with the help of rise and run values.

The calculator above can handle much of this math. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. A 12 in 12 pitch is a steep 45 degree angle roof. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Now divide the rise by the multiplier to get the pitch eg. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Roof pitch calculator results explained. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10.