1 4 Per Foot Roof Slope

To put it in perspective the angle of this slope would be around 30 degrees.

1 4 per foot roof slope.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 8 27 2014 9 49 23 am. For example a pitch 1 12 means that per every twelve yards of building length the rise will be equal to one yard. Flat roofs are not perfectly flat in reality they need a small slope for water runoff.

A low slope roof is one whose slope is less than 3 12. If the pitch is 1 3 the slope is 8 12. Strangely enough if a pitch of 6 inches rise per foot is entered then the degrees generated is not 22 5º it is 26 6º. A 12 12 roof pitch would be selected as 12 inches of rise per foot with no fraction and the value generated by the calculator would be 45º.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Low slope or steep slope commercial application. 4 3 1 slope. When looking at metal roofing panel you will need to consult with the manufacturer to ensure that the metal panel you selected will work for your application.

3 12 1 2 12 and 1 4 12. Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Roofs on most commercial buildings have at least a small slope of 1 4 inch.

An example for a steep sloped roof is 8 12. Remember slope is expressed as a ratio and in inches per foot. This means that the rise of the slope goes up or down 8 inches for every 12 inches. 18 4o inches per foot.

The most common slopes are. If the slope is 4 12 the pitch for the 24 foot span is 1 6. In commercial low slope roofing applications the roof has a slope of less than 3 inches per foot. Slope minimums for various roof coverings.

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. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches. 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. However you can only use this pitch with built up roofing or specialized synthetic roofing.

Steep slope means that the roof has a slope of more than 3 inches per foot. We can divide roofs into the following categories.