Bd feet per panel 1 8 per ft 0 5 1 1 5 2 2 5 3 4 4 5 aa a b c aa 2 a 2 b 2 c 2 2 x y y 2 x 4 y 4 3 16 per ft 3 6 3 8 per ft 0 5 1 25 2 2 75.
Roof slope 1 4 per foot.
The most common slopes are.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
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.
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.
Flat roofs are not perfectly flat in reality they need a small slope for water runoff.
3 12 1 2 12 and 1 4 12.
The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.
The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.
8 27 2014 9 49 23 am.
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.
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.
1 4 per ft q 2 4 0 5 2 3 5 5 6 5 8 9 5 1 2 per ft 8 0 5 2 5 4 5 8 5 6 5 10 5 q 2 q 4 q 6 q 8 x 2.
Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7.
18 4o inches per foot.
The patio needs to have a uniform surface to lay on.
You need to remove any vegetation soft soil and rocks before you begin.
We can divide roofs into the following categories.
Of your low slope roofing system.
Most roof s have a pitch in the 4 12 to 9 12 range.
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.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
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.
Low slope or steep slope commercial application.
A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.
However you can only use this pitch with built up roofing or specialized synthetic roofing.
The recommended slope is 1 4 inch per foot but it can be anywhere from 1 8 inch to 3 8 inch per foot depending on other factors.
