Multi Pitch Roof Framing

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration.

Multi pitch roof framing.

Near the top is a very steep pitch and near the upper walls of the home are a lower pitch though still fairly steep. This process uses pre built wood forms to build the roof frame. It may consist of a flat roof on top but the main design element is the multi pitch sloped in what is essentially a hip roof on top of another hip frame. The pitch of the roof refers to the angle or steepness of the roofing frame.

From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it measure down y height from the long point of the rafter cut and make a mark. Some designs are employed in specific regions and only when building codes allow it. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

The rise or height of the roof at its peak is the altitude of the triangle. But among the most popular roof style is a dual pitched roof. 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.

It consists of a base similar to a hip truss with a cap truss on top of it. If you build a flat roof try to have it slope in multiple directions to drains or gutters. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. How to construct a dual pitch roof.

Roof framing rafter layout. A dual pitch roof is a gable roof with two slopes that meet at a central ridge line. Multi piece piggy back a piggy back truss is used when roof framing requirements are taller than what a component manufacturer is capable of either shipping or producing with their production equipment. This will the first point of the rafter measurement line using the results of your rafter length calculation measure from this point along the rafter measurement.

It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. No matter which kind of roof framing is used they both contain one element that you ll need to be familiar with and that s the pitch of the roof. Think of a flattened hip roof. They have designs such as a flat roof mono pitched roof pent roof multi pitched roof a frame asian traditional style half hipped karahafu pyramidal and many others.

A flat roof has a slope of 1 8 per foot to 2 12. And the line length measurement from the roof peak to the building wall is the hypotenuse.