What is the purpose of a plumb cut?
Plumb cuts represent the vertical or straight up and down cuts once the rafter is placed in position. It is used on the top, tail, and bird’s mouth.
What is a plum cut?
: a cut in a vertical plane especially : the top cut face of a rafter that is designed to butt vertically against a ridgeboard — compare seat cut.
Which cut is also known as a plumb cut?
Plumb cut, typically called the ridge cut, at the top end of the rafter.
What is a seat cut?
: a cut at the outer end of a rafter that adapts it to fit the plate and normally has the form of a right-angled notch — compare plumb cut.
What is a seat cut and a plumb cut?
It is an indentation cut into the rafter which consists of a “seat cut” (the face of which rests on the top plate) and a “heel cut” or “plumb cut” (the face of which lies parallel to the supporting wall), forming a shape resembling a bird’s mouth.
Are hip and valley rafters the same?
This example has a roof with all faces at a 6/12 pitch, so again for every foot of horizontal run, there’s a rise of 6”. Relative to the main rafters however, the hip and valley rafters rise at an angle up the incline of the roof….Is the pitch of a hip and valley the same as a main rafter?
Rafter Pitch | Hip/Valley Pitch |
---|---|
10.0 / 12 | 7.1 / 12 |
11.0 / 12 | 7.8 / 12 |
12.0 / 12 | 8.5 / 12 |
What’s the difference between plumb and level?
A vertical framing piece, such as a post or stud, is “plumb” when it’s perfectly straight, and when a horizontal member has no tilt, it is “level.” The tools that carpenters and homeowners use to determine plumb and level all rely in some way on gravity. What tools are used for figuring out plumb and level?
What is a birdsmouth cut?
A birdsmouth is the little triangular cutout in the bottom of a rafter that provides a flat area so the rafter can rest solidly on—and be solidly attached to—a wall top plate. And, cutting a birdsmouth into a truss (because each is an engineered system) is an absolute no-no.
What are the advantages and disadvantages of hip roofs?
A hip roof has four slopes that come together at the top to form a ridge.
- Advantages: The four-way slope makes it much more stable than other roofing types, and allows water and snow to run off with ease.
- Disadvantages: Hip roofs are more complex than flat or gable roofs, making the odds of failure a bit higher.
What is a cross hipped roof?
A cross-hipped roof is a popular variation of a hip roof, which gently slopes on all four sides. For a cross, the two hip roofs are laid out in an “L,” installed perpendicular to each other.
What does it mean for a wall to be plumb?
The Meanings of Plumb It’s an adjective when it describes something that is perfectly vertical: “The wall is plumb.” It’s a verb when it identifies the action of making something plumb: “
What kind of cut is a plumb cut?
Plumb cut, typically called the ridge cut, at the top end of the rafter. Birdsmouth, which consists of two cuts – a horizontal seat cut and a vertical shoulder cut. Tail cut, which may be cut plumb or square, depending on how the eaves are detailed.
What does ” Plumb ” mean in construction or carpentry?
In the context of general construction or carpentry, the term plumb refers to a line or feature that is perfectly vertical.
What does the plumb bob mean in construction?
Builders today often use laser levels to project plumb lines of light onto surfaces or building elements. The plumb bob is the oldest, simplest, and still one of the best tools for establishing plumb. It consists of weight (the plumb) hanging at the end of a strong string.
Which is the correct definition of a plumb line?
plumb – the metal bob of a plumb line. plumb bob, plummet. bob – a hanging weight, especially a metal ball on a string. plumb line, perpendicular – a cord from which a metal weight is suspended pointing directly to the earth’s center of gravity; used to determine the vertical from a given point.