Roof Framing Details

Label and identify the parts of a.

Roof framing details.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. The original roof was built using purlins beams extending between gable ends. It is the form most commonly used by the navy. Transfers the loadof the roof through the raftersto walls below.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Parts of a roof. The rafters are usually positioned directly above the wall studs. 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.

The point at which all the raftersare attached to. Details for conventional wood frame construction. The rise or height of the roof at its peak is the altitude of the triangle. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters.

The run or half the building span is the base of the triangle. The rafters carry the applied loads to the exterior walls. Rafters act more like the top chord of a roof truss than as a roof joist. Common types of roofs and basic framing terms.

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. Framing a roof is the last step in framing new construction. Below is a sketch of the original roof wall structural details for this building. The function of each component is.

Wood construction data 1. Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center. It is simple in design economical to construct. Gable a gable roof has a ridge at the center and slopes in two directions.

If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters. A ridge board is a horizontal member of the roof frame. Most roofs utilize 16 inch spacings for strength and rigidity. Stick framing combines roof rafters with ceiling joists.

In a rafter roof all of these components are required to provide a stable roof. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. And the line length measurement from the roof peak to the building wall is the hypotenuse. An example of each is shown in figure 2 1.

Needed to tie the roof together where the rafters are framed at an angle to each other. 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.