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Creating flying rafters

Discussion in 'Roofing and Guttering' started by RickH, 31 May 2013.

  1. RickH

    RickH

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    Location:
    West Glamorgan
    Country:
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    I am creating a small cut roof, all 4 sides slope at 35 pitch to a short ridge board (rather than to an apex)
    on 3 side rafters will be birdsmouth cut to rest on a 150 x 50mm ring beam .
    At the front I want to fly the rafter ends out ... i.e extend roof ... same 35 degree pitch but extend out by around 300mm .... as if I were extending a soffit (but no soffits in this case.

    i.e like this side ways view
    http://tinyurl.com/mbd5742

    Assume I would create a horizontal extension, and vertical upstand (x & y)
    I would run a tie brace 'z' from one side to the other
    Are there any guidelines for ratio of length x ... was thinking of having 300mm extension i.e to left of ring beam, and using a 1/3 2/3 have 2/3 to the right of the beam, then joining the vertical ..... does 1/3 to 2/3 seem right, or is there a recommended ratio.

    Roof is to be plain tile clad.
     
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  3. tony1851

    tony1851

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    Can't follow this bit? Are you just cantilvering the rafters? You might be making it more complex than need be.
     
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