16 Pitch Roof
The combination of two numbers are used to display or show the roof pitch.
16 pitch roof. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. Roof pitch is a term describing how steep or flat your roof slope is. 1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42. You can go by the measurements taken by walking the roof.
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. A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof for roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1. A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Divide the rise by the run the run is 12.
Now that we are into framing he says that he is not comfortable building a 16 12 roof because it is too dangerous and is asking us to change the pitch to a 14 12. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Common rafter elevation if you are calculating rafter length from the center of the ridge beam as shown below you will need to subtract half of the thickness of the ridge beam from the top end of the rafter.
Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.