1 8 Roof Factor

8 1 x 12 scale factor 96.

1 8 roof factor.

Then multiply the square footage with the roof pitch factor to get the total area of the roof. 1 8 1 0 invert the fraction and multiply by 12. The maths behind this number is that it is the square root of rise run 2 1. This will give you the rise over run or pitch.

A speed square and level can be used to easily find the pitch of a roof. The pitch fraction represents a certain amount of vertical rise over the entire span. That is if your tape reads 7 then add 1 that will give you 8 12. The roof slope factor chart also consists of conversion factors to determine the slope of the roof.

20 x 12 scale factor 240. Measure with a speed square. Select the desired scale. A roof that rises 8 feet over a 24 foot span was said to have a 1 to 3 pitch.

Valley hip factor. 1 20 multiply the feet by 12. 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. Select the desired scale.

Set the level on the edge of the speed square as shown below then place the heel of the speed square on a rafter or gable edge of the roof. Roof pitch degree table. Image 1 12 to 12 12 roof pitch 7 12 pitch. 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.

The headache of using pythagoras and trigonometry can be spared by making use of these charts. For example if you measure 4 inches the pitch of your roof is 4 12. To convert an architectural drawing scale to a scale factor. To convert an engineering drawing scale to a scale factor.

For example given a roof with. The calculator above can handle much of this math. A 10 slope roof should not be confused with a 10 pitch roof as a 10 slope roof means that the roof rises by ten inches for every foot of run. If the rise is 4 feet over a 24 foot span then the roof pitch was said to be 1 to 6 the pitch can be expressed numerically as a fraction.

A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.