Intersecting Roof Framing

A disadvantage of the hip roof is that it is more difficult to construct than a gable roof.

Intersecting roof framing.

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. The author begins any complex roof project by making a scale framing plan of the roof left. Architectural home design software. This is useful for material takeoffs and as a job site reference.

Click here for enlarged image. It s steep pointed roof which extends all the way to the ground or close to the ground. A hip rafter forms a raised area or hip usually extending from the corner of the building diagonally upwards to the ridge. 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.

Where two gable roof lines meet the intersection forms inside corners called valleys. The valley is formed where the two different sections of the roof meet generally at a 90 angle. And the line length measurement from the roof peak to the building wall is the hypotenuse. Type of roof because it is braced by four hip rafters.

The diagonal rafter that runs from the intersection of the ridges down to the top of the walls at the inside. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. These hip rafters run at a 45 angle from each corner of the building to the ridge. The run or half the building span is the base 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. The rise or height of the roof at its peak is the altitude of the triangle. The roof makes up much or all off the walls of the home.

The a frame is very easy to identify. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The perspective sketch right shows the.