The rise or height of the roof at its peak is the altitude of the triangle.
Roof framing plan flat roof.
Flat roofs are always built at a slight incline at least 1 8 inch per foot.
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 flat roof has a slope of 1 8 per foot to 2 12.
Often the flat roof has a slight pitch in the rafters.
Think of a flattened hip roof.
Parts of a roof.
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.
If you build a flat roof try to have it slope in multiple directions to drains or gutters.
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.
It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.
One of the most important parts of building a sturdy roof is the initial roof framing plan.
This will help you create a flat roof framing plan.
Supported by lally columns.
A ridge board is a horizontal member of the roof frame.
Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house.
Ridge beam sits below the rafters.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Ridge board v s beam.
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.
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.
The run or half the building span is the base of the triangle.
Ridge board ridge beam.
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.
Some roofs actually slope in several directions ensuring optimal water runoff.
The point at which all the raftersare attached to.
When used it must be shown on the roof plan flat roof.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
Figure 20 9 shows how a flat roof could be repre sented on the roof plan.
The flat roof is a very common style in areas with little rain or snow.
Transfers the loadof the roof through the raftersto walls below.
