Gable And Valley Roof Framing

The run or half the building span is the base of the triangle.

Gable and valley roof framing.

The valley is formed where. 4 12 through 9 12 are the most common pitches. These hip rafters run at a 45 angle from each corner of the building to the ridge. Chapter 17 reading guide 465.

Vertical rise over horizontal run. Where two gable roof lines meet the intersection forms inside corners called valleys. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Blind valleys simplify framing.

To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. Intersecting the intersecting roof consists of a gable and valley or hip and valley. The rise or height of the roof at its peak is the altitude of the triangle. Roof framing is the last major framing activity in the construction of a house.

Type of roof because it is braced by four hip rafters. The diagonal rafter that runs from the intersection of the ridges down to. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. Shed or lean to roof gambrel roof mansard roof dutch hip roof hip roof hip valley roof low slope flat roof gable roof gable roof dormer gable valley roof gable roof with shed roof addition roof styles which roof.

A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. 3 inch rise per 12 run is a 3 12 pitch roof. Valley rafters and valley jacks. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors.

Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. If you begin with accurate as built measurements and use a construction calculator to do the math you can cut all of the rafters for most roofs on the ground in just one shot.

In the u s it is defined by the rise in inches to a 12 run. And the line length measurement from the roof peak to the building wall is the hypotenuse. But it doesn t have to be. A no math approach to valley plates.

This roof valley is a perfect example.