How To Build A Cut Roof

The ridge is a long board at the top that the rafters are nailed to.

How to build a cut roof.

A horizontal cut called the seat cut and a vertical cut called a shoulder cut. A birdsmouth cut has 2 parts. The rise or height of the roof at its peak is the altitude of the triangle. Pitched roof construction.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. The diagram above shows the components that go into making up a small gable roof. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

The run or half the building span is the base of the triangle. Robin is working on an extension so we thought we d shadow him for the day and see how he creates a pitched roof or semi pitched roof leading up to a flat. The ceiling joists span from wall plate to wall plate and are sometimes bolted to the rafters to help stop the ridge. The roof rafters provide integral structural support to the roof.

And the line length measurement from the roof peak to the building wall is the hypotenuse. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc.