Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.
Heal drop on 6 12 pitch roof hip.
Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries.
One of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area.
On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections.
While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof.
3535 x 16 5 65 or 5 16.
Angle the angle of a roof is the same as the roof s slope except instead of being.
Now simply measure up from the seat line of the birds mouth 5 16 for the correct drop.
Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.
Roof pitch calculator results explained.
8 x 75 6.
All formulae are below the calculator.
Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.
For example main roof is an 8 in 12 1 2 rafter thickness is 3 4.
Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.
This is because 16 97 is the diagonal of a 12 square and 12 is the run of the common rafter.
6 divided by 16 97 3535.
Roof pitch is used to describe the slope or angle of the roof.
Hip drop formula the simplest way i use to calculate hip drop is to take the first number of the given pitch of the main roof for 4 12 use 4 for 8 12 use 8 and then put this number over 24 and divide now you have 4 over 24 which is reduced to 1 6 and 1 6 of an inch is closest to 3 16.
You may wonder why we use 16 97.
A roof with a 6 rise for every 12 run has a 6.