2 12 Roof Angle

Common roof pitches and equivalent grade degree and radian angles.

2 12 roof angle.

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. 2 12 roof pitch angle 9 46 degrees. 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. Definitions vary on when a roof is considered pitched.

The 12 inch run is considered standard in roof pitch or angle terminologies. A 12 12 pitch roof has a pitch angle of 45. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

Simply put it s a shallow roof. Locate its tangent or tan and follow the left row for you to read its corresponding degree. The exact roof slope in degrees is given by the arctangent. Enter any pitch or fraction of pitch to find angle.

So use the 12 inch level as a constant run and 18 inch ruler as a variable rise. Most roof s have a pitch in the 4 12 to 9 12 range. To convert between american roofing ratios and pitch degrees follow these steps. 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 combination of two numbers are used to display or show the roof pitch. If a roof rises 2 in a length of 12 this is 2 12 roof pitch. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. Find the inverse tangent of the pitch to find the angle in degrees.

Divide the first part of the ratio by 12 to work out the pitch. Find all the needed factors in order to determine the pitch angle s degree. Conventional roofs are the easiest to construct and you can walk on them safely. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. They have a pitch ranging from 4 12 to 9 12. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

Angle the angle of a roof is the same as the roof s slope except instead of being.