Intersecting Roof Framing

Using a truss base to truss intersecting roofs training videos using a truss base to truss intersecting roofs.

Intersecting roof framing.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Drawing decorative beam or truss symbols. The valley is formed where the two different sections of the roof meet generally at a 90 angle. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

With the overlapping roof faces in top plan view select the roof faces and use the modify convert copy to lines command and choose hidden line as the rendering option. The run or half the building span is the base of the triangle. A hip rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. A disadvantage of the hip roof is that it is more difficult to construct than a gable roof.

You end up with a group of lines showing the outline of the roof plus the intersecting line between the roof faces. A gable roof is fairly simple geometrically but when two gable roof lines intersect the geometry gets more complicated. The rise or height of the roof at its peak is the altitude of the triangle. Then you can trim the roof faces to this line.

These hip rafters run at a 45 angle from each corner of the building to the ridge. The framing required at the intersection of two roof lines is easy to. Thus there arehip jack raftersand valley jack rafters. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

That bid you submitted for the job with the adjoining unequally pitched roofs gets accepted and you ve got to figure out a way to frame it. And the line length measurement from the roof peak to the building wall is the hypotenuse. A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. Type of roof because it is braced by four hip rafters.

Explore framing complexities that result when roofs of two different pitches intersect. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Automatic framing exposed rafter tails sub fascia and sheathing.