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Q: How many rafters needed for a 12 foot roof?
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How long for rafters for twenty foot wide one pitch roof?

25.8 feet


How do you determine pitch of roof?

The pitch of a roof is measure in a simple way. Rise over run. By this it means that, given the standard example of a 4/12 roof ,for every 12 inches or one foot of distance or run there is an according rise of 4 inches in height. If you wish to determine this you need to know the length of the rafters and then the height from the center of the rafter to the peak of the roof. For instance if the rafters happen to be 24 feet long that means that the run is 12 ft and if the height from the bottom of the rafter to the peak is 8 feet then you have a 8/12 pitch roof.


Is 2 by 4 walls and 2 by 2 rafters strong enough for a shingle roof?

This will depend on many things including:the spacing between the rafters;the spacing between the studs;the pitch of the roof;the wind zone;the type of fixings being used; andthe span of the rafters.Contact your local authority or a competent local builder or architect regarding what can be done in your area.


What is horizontal board that connects two rafters on opposite sides of a ridge board is?

The horizontal board that connects two rafters on opposite sides of a ridge board is called a collar tie. It helps to stabilize the rafters and prevent them from spreading apart, ensuring the structural integrity of the roof.


How does the job of a construction worker relates to math?

Relates in many different ways you are constantly working with fractions, there are different formulas for different things like figuring out the rise and run on a set of steps or the rafters to frame a roof.

Related questions

How many roof rafters needed 16 on center on a 30' span?

23


How long for rafters for twenty foot wide one pitch roof?

25.8 feet


How are framing rafters typically installed in a roof structure?

Framing rafters are typically installed in a roof structure by first determining the spacing and angle needed for the rafters. Then, they are cut to size and placed between the ridge board and the top plate of the wall. The rafters are secured in place with nails or screws, and additional bracing may be added for support.


What is the difference between roof joists and rafters in a building structure?

Roof joists are horizontal beams that support the ceiling and the weight of the roof, while rafters are sloped beams that support the roof itself. Joists are typically found inside the building, while rafters are located on the exterior.


What is a sentence using the word rafters?

You can see the rafters of the roof very clearly here.


What is the recommended spacing for 2x6 rafters in a roof structure?

The recommended spacing for 2x6 rafters in a roof structure is typically 24 inches on center.


What is a roof ridge beam?

At the peak of the roof where the rafters meet instead of the rafters meeting each other, there is a beam between them that they rest against. It runs the length of the roof peak.


How far can 2x6 rafters span when used in a roof construction?

The maximum span for 2x6 rafters in roof construction is typically around 9 feet.


What is the maximum span for 2x6 rafters in a residential roof construction?

The maximum span for 2x6 rafters in residential roof construction is typically around 9 feet.


How can I effectively insulate roof rafters to improve the energy efficiency of my home?

You can effectively insulate roof rafters by installing insulation material between the rafters and sealing any gaps or cracks to improve your home's energy efficiency.


i am a disabled in of a kidney,i am trying to get my house repaired,to be able to have weatherization,done to it, i need rafters done on my roof,before we can get it done?

in need of rafters on my roof,before i can have it weatherized


How are roof rafters typically framed in a residential construction project?

Roof rafters in residential construction projects are typically framed by cutting and assembling them on-site to form the pitched roof structure. They are usually placed at regular intervals along the top of the exterior walls and are secured in place with nails or screws. The rafters provide support for the roof sheathing and help distribute the weight of the roof evenly.