Framing Intersecting Roof Lines

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

Framing intersecting roof lines.

Lay your square in the corner of the plywood drawing working from the side of the diagonal line that represents the main roof. It extends from one gable end to the other at the peak of the roof. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

Keeping the outside edge of the blade flush with the edge of the plywood slide the square until the 12 inch mark on the tongue intersects with the hip. 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. Learn more about off angle roof framing. The ridge board is the horizontal framing member that defines the roofline in a gable roof.

Thus there arehip jack raftersand valley jack rafters. Intersecting the intersecting roof consists of a gable and valley or hip and valley. In a standard gable roof the ridge. Explore framing complexities that result when roofs of two different pitches intersect.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Position the square at the end of the rafter board with the tongue on your left and facing away from you. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both.