Off Angle Roof Framing

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.

Off angle roof framing. Collar ties rafter ties tension beams structural ridge beams. This model contains all the elements of an off angle framed hip valley roof. And the line length measurement from the roof peak to the building wall is the hypotenuse. The run or half the building span is the base of the triangle.

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. The very end of your rafter with the 6 inches 15 cm overhang built in and the birdsmouth cut neatly marked. The rise or height of the roof at its peak is the altitude of the triangle. The same roof has a 4 12 or 1 3 pitch.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the dropped structural ridge to the apex of the sleepers. The stair gauges will hold the framing square at the proper angle this will mark the tail cut. Keep the framing square in the same position and use your pencil to trace the tongue short side along the surface of the rafter.

First enter 4 12 for both the main and adjacent roof pitches with an eave angle of 90. Some of these can support the roof and prevent ridge sagging and wall spreading. Figure 18 3 hip roof framing plan framing plan this is the framing plan for a small. Roof pitch calculator results explained.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. On this house the main roof slope is an 4 12 pitch and the off angle california framing is at an 6 12 pitch. Explore framing complexities that result when roofs of two different pitches intersect. How the parts fit the doubled valley rafter in this drawing has been cut off at the top plate.

Angle the angle of a roof is the same as the roof s slope except instead of being. 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. 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. Learn more about off angle roof framing.

A measurement of roof area that equals 100 square feet an area 10 feet by 10 feet. Normally it is extended to become part of the overhang.