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.
Rafter parts of a roof frame.
By upper third here we mean one third of the length of the rafter from ridge to top plate.
Ridge beam sits below the rafters.
Supported by lally columns.
Components of roof truss.
A piece of lumber laid horizontally on a wall to support the rafter.
The central vertical post in a king post roof truss.
The rafters and trusses are connected to the ridge board for a cohesive framework.
Parts of a rafter the top of a a rafter usually joins a ridge.
Transfers the loadof the roof through the raftersto walls below.
A collar tie is a horizontal roof rafter compression connector that is located in the uppermost third of the span of a pair of opposed sloped or gable roof rafters.
A roof truss is a structural unit designed to frame a roof and to support the roof material interior ceiling insulation and forces caused by snow rain and wind.
The point at which all the raftersare attached to.
A ridge board is a horizontal member of the roof frame.
Parts of a roof.
For most load bearing requirements a roof truss will need to be placed every two feet along the walls.
Definition of collar tie in roof framing definition.
Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.
A roof truss is supported by the exterior walls and span the width of the building.
A composite decking made of solid materials.
The rafters are really functional parts of both the walls and the roof.
A horizontal timber or metal resting at the peak of the roof.
There must be no gaps in the precision of the fit.
The structural relationship between the rafters and the wall is the same in all types of roofs.
Ridge board ridge beam.
The roof rafters provide integral structural support to the roof.
The miter is simply a plumb cut.
Determine how many rafters you ll need for the roof.
The bottoms of the rafters rest on the plate member providing a connecting link between the wall and the roof.
The larger rafter that sits directly on a tie beam and used to carry a purlin.
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.
Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.
Depending on how wide the home is you can divide the total length in feet by two to determine how many trusses will be needed.
Rafters are fastened in one of several ways determined by the type of roof.
