The rise or height of the roof at its peak is the altitude of the triangle.
Roof framing plan flat roof.
Think of a flattened hip roof.
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.
Parts of a roof.
One of the most important parts of building a sturdy roof is the initial roof framing plan.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
Some roofs actually slope in several directions ensuring optimal water runoff.
Ridge board v s beam.
Transfers the loadof the roof through the raftersto walls below.
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.
Figure 20 8 shows the materials commonly used to frame a flat roof.
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.
Ridge beam sits below the rafters.
Often the flat roof has a slight pitch in the rafters.
Flat roofs are always built at a slight incline at least 1 8 inch per foot.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Figure 20 9 shows how a flat roof could be repre sented on the roof plan.
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.
From there the flat roof system you choose will determine the materials you apply.
Ridge board ridge beam.
A flat roof has a slope of 1 8 per foot to 2 12.
The point at which all the raftersare attached to.
The run or half the building span is the base of the triangle.
When framing a flat roof you will need to create a slight incline.
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.
You can do this with a foam layer that exactly fits your roof.
This will help you create a flat roof framing plan.
It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.
The flat roof is a very common style in areas with little rain or snow.
A ridge board is a horizontal member of the roof frame.
If you build a flat roof try to have it slope in multiple directions to drains or gutters.
