Framing Irregular Hip Roof

A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof.

Framing irregular 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. Next click on the hip angles button and then click on the hip valley rafter slope angle text. Irregular hips geometry based on billy dillon s article in the sept. View the hip rafter roof plane alignment blog for more examples of the hip rafter plumb mark line shift on equal pitched roofs.

Dedicated to the art of carpentery roof framing. It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12. Irregular hip geometry framing dxf auto generated dxf cad file of irregular hip geometry drawing each time script is run. A hip and valley roof may be part of an irregular structure.

Master carpenter series 2 464 views. Framing angle hip roof drawings. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners. 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.

Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. Saved by norcal a s. Select the following information by using the drop downs to enter values in feet and inches. 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.

Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. When framing irregular hip valley roofs the h v rafter members are not equally split by the sheathing lines. 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. 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.

Pt2 in depth mixed pitch hip and valley roof cutting math theory and technique series. We are the professionals for the future of the craft of carpentry. 2007 jlc on complex roof geometry.