Off Angle Roof Framing

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Off angle roof framing.

Slope a roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. The same roof has a 4 12 or 1 3 pitch. Normally it is extended to become part of the overhang. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

First enter 4 12 for both the main and adjacent roof pitches with an eave angle of 90. Roof pitch calculator results explained. Learn more about off angle roof framing. The calculated results will give you the main roof hip rafter slope angle 13 26268 and the main roof hip rafter back angle 12 92097.

The run or half the building span is the base of the triangle. Explore framing complexities that result when roofs of two different pitches intersect. And the line length measurement from the roof peak to the building wall is the hypotenuse. This model contains all the elements of an off angle framed hip valley roof.

How the parts fit the doubled valley rafter in this drawing has been cut off at the top plate. Download this model to follow along with the process learning where off angle roof framing is required as well as how various components of this unusual roof framing configuration are inter. Angle the angle of a roof is the same as the roof s slope except instead of being. Keep the framing square in the same position and use your pencil to trace the tongue short side along the surface of the rafter.

Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. The rise or height of the roof at its peak is the altitude of the triangle. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Some of these can support the roof and prevent ridge sagging and wall spreading.

A measurement of roof area that equals 100 square feet an area 10 feet by 10 feet. The stair gauges will hold the framing square at the proper angle this will mark the tail cut. To scribe the angle we placed a length of stock on top of the rafter peaks and leveled it across using a scrap block to trace the angle. Figure 18 3 hip roof framing plan framing plan this is the framing plan for a small.

Doubled valleys are sometimes used to provide more bearing for the roof sheathing. The very end of your rafter with the 6 inches 15 cm overhang built in and the birdsmouth cut neatly marked.