Irregular Hip Roof Framing

Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.

Irregular hip roof framing. Most roof eave angle corners are at 90. Hip roofs can be generally framed into a large variety of sizes that can be t or l shaped and may need a more complex frame structure. 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. Next click on the hip angles button and then click on the hip valley rafter slope angle text.

As compared to global roof framing hip roof framing is more difficult because it consists of four sides with variable lengths instead of two sides. 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. Mark 3 perpendicular lines on the top edge of the hip rafter using these dimensions. If the building is square and the sides are of equal length the roof planes will meet at a point as in a pyramid.

Framing angle hip roof drawings. Hip roof roof deck backyard gazebo pergola porch extension framing construction roof shapes roof lantern carpentry projects. When framing irregular hip valley roofs the h v rafter members are not equally split by the sheathing lines. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.

Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Select the following information by using the drop downs to enter values in feet and inches. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. The ridge board is centered here in terms of length as well as width.

Irregular hip framing formulas variables major pitch minor pitch major run jack rafter spacing formulas eave angle 90 major pitch angle atan major pitch 12 minor pitch angle atan minor pitch 12 minor run major pitch minor pitch major run major plan angle arctan minor pitch major pitch minor plan angle arctan major pitch minor pitch hip pitch angle arctan tan major pitch angle sin major plan angle major pitch hip backing. It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12. Roof eave angle this is the corner angle of the building. One of the strongest ways to frame a roof is using a hip roof design.

For irregular or bastard hip roofs the roof eave angle can be between 35 and 150 you ll get an unconstructable error message if the roof is unconstructable with the current input parameters.