The point at which all the raftersare attached to.
Roof framing plan flat roof.
This will help you create a flat roof framing plan.
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.
The flat roof is economical to construct because ceiling joists are elimi nated and rafters are used to support both the roof and ceiling loads.
Figure 20 9 shows how a flat roof could be repre sented on the roof plan.
A flat roof has a slope of 1 8 per foot to 2 12.
Ridge beam sits below the rafters.
In addition to being used in residential construction the flat roof is typically used on commercial structures to provide a platform for heating and other mechanical equipment.
A ridge board is a horizontal member of the roof frame.
The flat roof is a very common style in areas with little rain or snow.
One of the most important parts of building a sturdy roof is the initial roof framing plan.
When framing a flat roof you will need to create a slight incline.
The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof.
Parts of a roof.
Often the flat roof has a slight pitch in the rafters.
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.
It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
From there the flat roof system you choose will determine the materials you apply.
Figure 20 8 shows the materials commonly used to frame a flat roof.
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.
Transfers the loadof the roof through the raftersto walls below.
Some roofs actually slope in several directions ensuring optimal water runoff.
When used it must be shown on the roof plan flat roof.
Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.
You can do this with a foam layer that exactly fits your roof.
Ridge board ridge beam.
Think of a flattened hip roof.
Flat roofs are always built at a slight incline at least 1 8 inch per foot.
Supported by lally columns.
