Parts of a roof.
Roof framing details.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Rafters act more like the top chord of a roof truss than as a roof joist.
Gable a gable roof has a ridge at the center and slopes in two directions.
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.
Below is a sketch of the original roof wall structural details for this building.
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.
Needed to tie the roof together where the rafters are framed at an angle to each other.
The point at which all the raftersare attached to.
The function of each component is.
In a rafter roof all of these components are required to provide a stable roof.
The rafters are usually positioned directly above the wall studs.
Define ridge board rafter hip valley sheathing fascia soffit dormer and pitch.
The rise or height of the roof at its peak is the altitude of the triangle.
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.
Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters.
The original roof was built using purlins beams extending between gable ends.
An example of each is shown in figure 2 1.
A ridge board is a horizontal member of the roof frame.
Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center.
Framing a roof is the last step in framing new construction.
Label and identify the parts of a.
If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters.
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.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
Wood construction data 1.
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.
Details for conventional wood frame construction.
Most roofs utilize 16 inch spacings for strength and rigidity.
Stick framing combines roof rafters with ceiling joists.
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 run or half the building span is the base of the triangle.
Transfers the loadof the roof through the raftersto walls below.
It is the form most commonly used by the navy.
The rafters carry the applied loads to the exterior walls.
