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 beam framing plan.
The point at which all the rafters are attached to.
Let s consider a basic gable wood roof framing design.
Parts of a roof a ridge board is a horizontal member of the roof frame.
Some of these can support the roof and prevent ridge sagging and wall spreading.
The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
Here we have a wood framed gable roof.
This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.
Determining the ridge beam height.
The finished ridge beam height z above the top of the wall will be m plus the y height.
Transfers the load of the roof through the raftersto walls below.
Collar ties rafter ties tension beams structural ridge beams.
Roof framing simply describes how a group of rafters and beams are fitted or joined together in order to provide support for the roof covering.
In order to do roof framing properly it is important to understand the unique shape and dimensions of your roof since these will greatly impact the geometry of the roof frame.
Ridge beam sits below the rafters.
If you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam for example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet.
Framing a roof is the last step in framing new construction.