Hip Roof Framing Purlins

Now draw the centerlines for all rectangles that are formed inside.

Hip roof framing purlins.

Now outline the biggest rectangle inside the building layout. Hip and valley roof framing is no so complex as compared to hip roof framing procedures. All angles can be found on the chappell univer. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.

Roof framing geometry kernel rafter lengths roof ratio multiplier. Hip rafter ratio length multiplier hrrlm 18 12 1 5 common rafter length multiplier crlm 13 4164 12 1 11803. Divide the rafter length by 12 of run to calculate the roof ratio multiplier. First of all you need to design the layout of building.

Photo above is from a jwk inspections framing pre drwall inspection in the san antonio south teaxas area showing the actual roof framing componenents. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Here roofs are constructed with an angle of 90 degrees. Stabilization typically involves installation of a purlin system.

This series covers roof framing roofing materials the attic and the conditions that affect the roofing materials and components including wind and hail. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. Purlins are not required or needed unless rafters are overspanned and then the purlins serve as support to prevent roof sag deflection due to the overspanned and or undersized rafters.