Framing Hip Roof With Different Pitches

Explore framing complexities that result when roofs of two different pitches intersect.

Framing hip roof with different pitches.

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. Learn more about off angle roof framing. Here roofs are constructed with an angle of 90 degrees. The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance.

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. First of all you need to design the layout of building. Modern residential hip roof construction uses common pitch ratios in general.

Now draw the centerlines for all rectangles that are formed inside. A dutch hip roof is a combination of both the hip roof and gable roof features. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Blind valleys simplify framing 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.

Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. But here it will be different since the hip rafter doesn t lie at 45 degrees to the commons.

Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. Select the following information by using the drop downs to enter values in feet and inches. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters.