And the line length measurement from the roof peak to the building wall is the hypotenuse.
Residential roof framing plan.
For most load bearing requirements a roof truss will need to be placed every two feet along the walls.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Framing must transfer all gravity uplift and lateral loads to the foundation.
Gable a gable roof has a ridge at the center and slopes in two directions.
Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
As you can see the initial plan for framing your roof needs to take into account several key variables such as the shape of the roof and any relevant community building codes.
The size of the ridge board and hip and valley rafters.
Here we have a wood framed gable roof.
Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters and panel sheathing products.
The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members.
For high wind conditions prescriptive guidelines for design and construction may be found in the wood.
Continuing on from part 3.
Within limitations which include among others building size roof pitch and design loads the allowed span for conventional rafters can be selected from tables rather than designed through engineering calculations.
Similar prescriptive design aids and efficient framing practices can be found in cost effective home building.
Let s consider a basic gable wood roof framing design.
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.
Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to.
Known as prescriptive framing.
Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss.
The run or half the building span is the base of the triangle.
Also different architectural styles will use the same type of roof.
The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
The rise or height of the roof at its peak is the altitude of the triangle.
You will then have to choose between two very different types of roof framing stick framing vs.
Common types of roofs and basic framing terms.
It is the form most commonly used by.
Deck exterior and interior load bearing walls beams girders posts and floor framing.
An example of each is shown in figure 2 1.
In buildings including residential structures framing systems typically consist of the roof structure that supports the roof.
