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Thread: Frames (ribs) and the keel.

  1. #1
    Join Date
    Oct 2016
    Location
    Spry Bay, NS, Canada
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    2

    Default Frames (ribs) and the keel.

    Screen Shot 2018-12-05 at 5.38.05 PM.png I've got this boat plan that has curved ribs and a 2x6 keel. That's what's in the attached image. What the [lans don't tell me is how to fasten the ribs to the keel. Seems like I need some help. The boar has 15 sets of ribs and the keel is 16'-0" long. Somebody MUST have an answer. Thanks in advance.
    Mark
    PS - My private email is mskpsm@gmail.com

  2. #2
    Join Date
    Mar 2014
    Location
    Hasslö, Blekinge, Sweden
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    643

    Default Re: Frames (ribs) and the keel.

    I don't think they are supposed to be fastened to the keel.

    /Mats
    Yes the avatar depicts me; yes I drew the comic boat pic, it's a joke on the pop song I'm not a robot by Marina and the diamonds

  3. #3
    Join Date
    Jan 2004
    Location
    Norwich,United Kingdom
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    5,765

    Default Re: Frames (ribs) and the keel.

    Bud McIntosh would have advised you to let them in.Some designers just but them up to the keel,having cut a limber hole.A substantial floor timber will tie the ends of port and starboard frames to the keel.I advise you to delete your email as any registered user can use the private message function to communicate and the spambots won't see it.

  4. #4
    Join Date
    Mar 2014
    Location
    Hasslö, Blekinge, Sweden
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    643

    Default Re: Frames (ribs) and the keel.

    Yes, floor timbers at every second or so frame pair to join them (or rather the strakes) to the keel is a normal practice.
    I think it depends if the floor timbers are needed; a still water rowing boat may not need them while a salt water sailing boat would.

    /Mats
    Yes the avatar depicts me; yes I drew the comic boat pic, it's a joke on the pop song I'm not a robot by Marina and the diamonds

  5. #5
    Join Date
    Oct 2008
    Location
    Walney, near Cumbria UK
    Posts
    41,807

    Default Re: Frames (ribs) and the keel.

    Those bits of wood that the ceiling floor boards are sitting on are floors, there may be a floor bolted to the side of every timber, or as Mats says, between the timbers or to every other timber.
    Do you not have a profile drawing or a list of scantlings that will set out the floors?
    It really is quite difficult to build an ugly wooden boat.

    The power of the web: Anyone can post anything on the web
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  6. #6
    Join Date
    Mar 2011
    Location
    Mukilteo, WA
    Posts
    1,908

    Default Re: Frames (ribs) and the keel.

    On many boats, the frames are notched into the keel and fastened. I do not think that is what this boat intends. Cut the bottom of the frames 1/2" back from the keel (actually the keelson) so that water can drain by. Rely on the floor timbers (the triangular bits) to hold the frames to the keel. I would use floors on every frame pair with this configuration. Also install drainage holes in the floor timbers.

  7. #7
    Join Date
    Oct 2016
    Location
    Spry Bay, NS, Canada
    Posts
    2

    Default Re: Frames (ribs) and the keel.

    Thanks for all your help.
    I appreciate it very much.
    Mark

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