Framing Hip Roof With Different Pitches

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.

Framing hip roof with different pitches.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Hip and valley roof framing is no so complex as compared to hip roof framing procedures. 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. Here roofs are constructed with an angle of 90 degrees.

Explore framing complexities that result when roofs of two different pitches intersect. Learn more about off angle roof framing. Modern residential hip roof construction uses common pitch ratios in general. From simple to very complex computer generated hip roof designs.

Now outline the biggest rectangle inside the building layout. But here it will be different since the hip rafter doesn t lie at 45 degrees to the commons. 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. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17.

Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. First of all you need to design the layout of building. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. 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.

Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. Now draw the centerlines for all rectangles that are formed inside. Select the following information by using the drop downs to enter values in feet and inches.