1 8 Roof Factor

Valley hip factor.

1 8 roof factor.

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. This will give you the rise over run or 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. For example given a roof with.

Select the desired scale. 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. 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.

8 1 x 12 scale factor 96. For example the roof layer that protrudes above the roof is 1 so add 1 to your tape reading. 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. A roof that rises 8 feet over a 24 foot span was said to have a 1 to 3 pitch.

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. Image 1 12 to 12 12 roof pitch 7 12 pitch. Roof pitch degree table. 1 20 multiply the feet by 12.

The headache of using pythagoras and trigonometry can be spared by making use of these charts. To convert an engineering drawing scale to a scale factor. The maths behind this number is that it is the square root of rise run 2 1. The calculator above can handle much of this math.

1 8 1 0 invert the fraction and multiply by 12. Then multiply the square footage with the roof pitch factor to get the total area of the roof. 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. 20 x 12 scale factor 240.

The roof slope factor chart also consists of conversion factors to determine the slope of the roof. That is if your tape reads 7 then add 1 that will give you 8 12. Measure with a speed square. Select the desired scale.

The pitch fraction represents a certain amount of vertical rise over the entire span.