Roof Slope 1 4 Over 12 Note

Most roof s have a pitch in the 4 12 to 9 12 range.

Roof slope 1 4 over 12 note.

Roof pitch degree table. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. Image 1 12 to 12 12 roof pitch 7 12 pitch. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. Slope conversion tables 1 4 1 2 3 4 1 1 1 4 1 1 2 1 3 4 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 2 25 3 4 5 6 7 8 9 10. The combination of two numbers are used to display or show the roof pitch. This will give you the rise over run or pitch.

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. 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. For example if you measure 4 inches the pitch of your roof is 4 12. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.