Roof Slope 1 4 Over 12 Note

This will give you the rise over run or pitch.

Roof slope 1 4 over 12 note.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Image 1 12 to 12 12 roof pitch 7 12 pitch. 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.

Roof pitch degree table. 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. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.

If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. For example if you measure 4 inches the pitch of your roof is 4 12. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

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