Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is.
Detail hip and valley roof framing.
In a rafter roof all of these components are required to provide a stable roof.
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties.
Hipped roof construction can seem quite complicated to grasp at first but i m going to break it down and explain each area in detail.
In the u s it is defined by the rise in inches to a 12 run.
Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results.
Vertical rise over horizontal run.
And the line length measurement from the roof peak to the building wall is the hypotenuse.
An example of each is shown in figure 2 1.
Now draw the centerlines for all rectangles that are formed inside.
First of all you need to design the layout of building.
Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same.
The function of each component is.
Parts of a roof the main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang.
Common types of roofs and basic framing terms.
The run or half the building span is the base of the triangle.
Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other.
Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries.
The gable portion of a dutch hip roof is usually placed at the end of the roof ridge and sits on top of the plane of the hip roof.
Now outline the biggest rectangle inside the building layout.
It is the form most commonly used by.
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.
Hip and valley roof framing is no so complex as compared to hip roof framing procedures.
It is sometimes also referred to as a dutch gable roof precisely because it contains both roof style features.
Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.
Here roofs are constructed with an angle of 90 degrees.
3 inch rise per 12 run is a 3 12 pitch roof.
4 12 through 9 12 are the most common pitches.
The rise or height of the roof at its peak is the altitude of the triangle.
Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.