To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge.
Hip roof valley framing.
Now draw the centerlines for all rectangles that are formed inside.
A mastery of roof framing with hip valley and jack rafters is what distinguishes the true hip rafters 18 1 figure 18 1 hip jack and valley rafters roof anatomy a.
I ll start at the beginning with the easy bits before tackling the more complicated stuff and that way hopefully i ll make it really clear and easy to understand exactly how to set out measure cut and install hip and valley roof rafters.
Now outline the biggest rectangle inside the building layout.
It is sometimes also referred to as a dutch gable roof precisely because it contains both roof style features.
For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17.
The hip and valley factor is a number that is multiplied by the actual run horizontal distance of a common rafter to determine the length of a hip or valley rafter.
Blind valleys simplify framing.
Here roofs are constructed with an angle of 90 degrees.
Hip and valley roof framing is no so complex as compared to hip roof framing procedures.
Repeat the run not the length of a common rafter for precision the thickness of the ridge board and any eave.
Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.
The gable portion of a dutch hip roof is usually placed at the end of the roof ridge and sits on top of the plane of the hip roof.
Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries.
A dutch hip roof is a combination of both the hip roof and gable roof features.
For regular hips and valleys where the roof sections have the same slope and meet to form a 90 degree angle.
The general arrangement of rafters shown in the larger drawing.
Unit run of the hip.
Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.
After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side.
Hipped roof construction can seem quite complicated to grasp at first but i m going to break it down and explain each area in detail.
First of all you need to design the layout of building.
504 chapter 18 hip valley jack rafters.
