Estimating Edge’s team of experienced construction professionals and software engineers have developed the industry’s smartest takeoff and estimating software solutions for competitive estimates. Don’t just estimate faster. Estimate better.
Calculate Gables & Rakes
How To Calculate Gables & Rakes
To calculate the pitch of a Hip/Valley of a roof, The EDGE has to calculations based on specific points of reference, every time. The EDGE uses Plan View to calculate measurements and to apply a specific formula to its measurements. That formula is the “Pythagorean Theorem” using the following examples.
Calculating Gable Ends:
Using the Pythagoras’s Theorem – a2 + b2 = c2 where: (a = 6′ 0″ and b=12′ 0″)
The EDGE then calculates the distance of the Hypotenuse or in this case c2.
a2 + b2 = c2
62 + 122 = c2
36 + 144 = c2
c2= 180 or
c = 13.416
Therefore, when you measure a Gable End, in “Plan View”, if the Flat (Base of Gable) is 12′ 0 “, The EDGE Gable Length will show 13.416′.
That being said, if we take 13.416 and divide it by 12 ( 13.416 / 12 ), this will give us our “multiplication factor” for our pitch – 13.416 ÷ 12 = 1.118
This is the factor that The EDGE uses to measure, In Plan View, for a 6/12 Pitch.
Calculating Hips & Valleys:
Looking at the roof plan below, we’ll demonstrate how The EDGE calculates the Hips & Valleys using the same 6/12 Roof system that we just looked at.
Here again, we can see how this formula works.
a2 + b2 = c2
Where: 36 + 289 = c2
C = 18.027
In Plan View, you are actually measuring the base of the Hip/Valley, and The EDGE is calculating the Hypotenuse of the Triangle.