Gable Roof Framing Detail

If you re a little unsure of your rough framing or roofing skills hire a carpenter to help with this phase of the roof dormer project.

Gable roof framing detail.

Common types of roofs and basic framing terms. Gable a gable roof has a ridge at the center and slopes in two directions. And the line length measurement from the roof peak to the building wall is the hypotenuse. Roof failures are often observed on areas of the building where wind pressures are concentrated.

Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing. An example of each is shown in figure 2 1. 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. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs.

This is now addressed in the international residential code. One is a failure of the hinge at the connection between the top plate of the wall and the gable end framing if the gable end is not balloon framed with continuous studs. Wide about 9 ft. The gable dormers we built are 6 ft.

From the floor to the peak and set back from the front wall of the house about 2 ft. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The rise or height of the roof at its peak is the altitude of the triangle. The run or half the building span is the base of the triangle.

Each dormer adds about 30 sq. Wall plates and joists set out the wall plates to whatever centers you need for your gable roof 400 450 600 or 900 governed by the weight of roof covering ie tiles and cut fix the joists so they are parallel to each other and flush with the back edge of the wall plates. Connection between top plate and gable end framing. The three primary variables to consider when designing the eaves for a gable roof are the width of the gable trim the projection of the eaves and the details at the corner of the gable ends.

Since 2009 section r602 3 has required that studs shall be continuous from support at the sole plate to a support at the top plate to resist loads perpendicular to the wall. Framing the gable ends 1 nail 2 boards onto your walls as top plates. The roof structure consisting of the roof framing roof decking sheathing and any internal bracing also functions as a horizontal diaphragm and transfers the horizontal loads imposed on the roof to the supporting walls below. Gable roof step by step.

The main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang. The ridge board is non load bearing and merely provides the point of connection for the opposing rafters and is only a nominal 1 thick. It is simple in design economical to construct. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles.