Irregular Hip Roof Construction

A hip and valley roof may be part of an irregular structure.

Irregular hip roof construction.

Have you ever struggled with how to build a roof or framing a polygo. Minor side roof pitch minor. Major side roof pitch major. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.

Major side plan angle. View the hip rafter roof plane alignment blog for more examples of the hip rafter plumb mark line shift on equal pitched roofs. A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof. Select the following information by using the drop downs to enter values in feet and inches.

Next click on the hip angles button and then click on the hip valley rafter slope angle text. This type of roof is also called broken back hip and valley roof because the main hips are intconeected by the rafter of gables on one side and the rafter of the valley on the other. When framing irregular hip valley roofs the h v rafter members are not equally split by the sheathing lines. We ll use the 12 as the rotation point on the framing square and move the other end of the framing square to the edge of the hip rafter material using the 6 rotation dimension.

They are off center to illustrate this using sketchup and your models dimensions draw a right triangle with one leg at 25 9 3 8 and the other leg length at 17 2 5 8 now scale the triangle down so the hypotenuse is reduced to 1 1. 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. Easy rafters does not calculate a complete four sided hip roof but rather calculates the common hip and jack rafters for one end of a hip roof. View the irregular hip roof valley rafter framing blog for how to layout the hip rafter backing depth mark and the hip rafter side cut mark for hip rafter side cut angles.

Hip roof roof deck backyard gazebo pergola porch extension framing construction roof shapes roof lantern carpentry projects. Framing angle hip roof drawings.