Roof Framing Details

While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.

Roof framing details.

In a rafter roof all of these components are required to provide a stable roof. And the line length measurement from the roof peak to the building wall is the hypotenuse. If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters. Transfers the loadof the roof through the raftersto walls below.

Skillion shed style roof framing the skillion and shed style roofs are framed with a single slope 2 4 or 2 6 or thicker rafters spanning from the low wall to the high wall. Label and identify the parts of a. Common types of roofs and basic framing terms. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. The function of each component is. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members. An example of each is shown in figure 2 1.

Details for conventional wood frame construction. The rafters are usually positioned directly above the wall studs. The point at which all the raftersare attached to. It is the form most commonly used by the navy.

Define ridge board rafter hip valley sheathing fascia soffit dormer and pitch. Wood construction data 1. A 2 nominal lumber thickness provides the maximum pullout values for both screws and nails when the fasteners penetrate a minimum of 1 into the wood. Needed to tie the roof together where the rafters are framed at an angle to each other.

It is simple in design economical to construct. Below is a sketch of the original roof wall structural details for this building. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters. Rafters act more like the top chord of a roof truss than as a roof joist.

A ridge board is a horizontal member of the roof frame. The substructure to which the metal panels are fastened must be properly spaced and sufficiently thick to provide a roof or wall system able to meet required design loads. The original roof was built using purlins beams extending between gable ends. Framing a roof is the last step in framing new construction.

The rise or height of the roof at its peak is the altitude of the triangle. Stick framing combines roof rafters with ceiling joists. The run or half the building span is the base of the triangle. Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center.

Gable a gable roof has a ridge at the center and slopes in two directions. Most roofs utilize 16 inch spacings for strength and rigidity.