Continuing on from part 3.
Frame roof design.
Another common design in the northeast is the saltbox which is a gable roof with one longer side.
The roof makes up much or all off the walls of the home.
Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
Valleys the inverse of a ridge or lines that appear to go inward on a roof.
The typical use case for a warm roof is the flat roof.
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.
The roof frame work mainly consists of purlins inferior purlin central purlin and ridge purlin ridge collar rafter and roofing battens.
Their inherently simple design makes it easy to build them and cheaper than more complex designs.
The a frame is very easy to identify.
Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult.
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.
Gable roofs can be problematic in high wind and hurricane areas.
The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
Shed gable hip gambrel and mansard.
Framers stick building a hip roof you can learn a great deal about roof framing by understanding the concepts of framing a gable or shed roof.
Let s consider a basic gable wood roof framing design.
It s steep pointed roof which extends all the way to the ground or close to the ground.
High winds can also cause materials to peel away from gable roofs.
Roof framing depends on the type of roof you want to build.
It s a very simple roof design and is inexpensive because the roof serves as both roof and walls.
A single shell roof is also called warm roof and it is an unventilated roof.
This is the basic problem involved in determining the length of a roof rafter a brace or any other member that forms the hypotenuse of an actual or imaginary right triangle.
The framing square is used most frequently to find the length of the hypotenuse longest side of a right triangle when the lengths of the other two sides are known.
If the frames are not properly constructed with adequate supports the roof can collapse.
Building strong stick frame roofs although truss designed roofs are predominant throughout most of the residential construction industry there are regions where building with stick frame roofs is still common.
In combination of roof styles a hip will connect to another part of the roof as part of the frame.
Roofs are basically five types.
A distinction is made between single shell and double shell roofs.
Generally wherever 2 sloped planes connect other than at a peak point a valley is formed.
