Intersecting Roof Framing

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Intersecting roof framing.

The roof makes up much or all off the walls of the home. A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. The perspective sketch right shows the. This is useful for material takeoffs and as a job site reference.

And the line length measurement from the roof peak to the building wall is the hypotenuse. In figure 18 1 are required when framing complex roofs such as hip roofs and inter secting gable roofs for more on roof types see chapter 17 basic roof framing. A hip rafter forms a raised area or hip usually extending from the corner of the building diagonally upwards to the ridge. Click here for enlarged image.

The author begins any complex roof project by making a scale framing plan of the roof left. It s a very simple roof design and is inexpensive because the roof serves as both roof and walls. For the purposes of this article i ll show how to frame the intersection of two hip roofs of unequal pitch. The rise or height of the roof at its peak is the altitude of the triangle.

A valley rafter forms a depression in the roof instead. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. It s steep pointed roof which extends all the way to the ground or close to the ground. The valley is formed where the two different sections of the roof meet generally at a 90 angle.

Where two gable roof lines meet the intersection forms inside corners called valleys. The run or half the building span is the base of the triangle. These hip rafters run at a 45 angle from each corner of the building to the ridge. A truss base is a closed polyline that defines the area in which valley fill roof trusses are to be built across and above the tops of normal full size roof trusses.

Intersecting the intersecting roof consists of a gable and valley or hip and valley. Architectural home design software. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.