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Thread: Oughtred strong back box

  1. #1
    Join Date
    Jul 2007
    Location
    Charleston, SC
    Posts
    246

    Default Oughtred strong back box

    In his clinker plywood boatbuilding manual Iain Oughtred added one afterword about using "building boxes" as a substitute for the long bearing structure or strong back. I am going to try them out and constructed two 8' boxes that look like they could be used in gross anatomy. 1/2 hardwood ply on easily to remove 4" wheels.
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  2. #2
    Join Date
    May 2015
    Location
    Guerilla Bay, NSW, Australia
    Posts
    196

    Default Re: Oughtred strong back box

    That should work well though I like to be able to crawl/wriggle under the hull when I have to scrape out the epoxy on the inside of the planks. My friend showed me how to make a strongback using wooden floor joists which work a treat because they don't bend or twist.......................

    Regards Neil

  3. #3
    Join Date
    Apr 2015
    Location
    St. Helens, Oregon
    Posts
    2,468

    Default Re: Oughtred strong back box

    I've done somethings similar and added shelf pins inside so I can just stand them up for storage when not in use. Mine are the right width so that laid on edge I use them as an outfeed table for my thickness sander with rollers staggered to carry stock.

  4. #4
    Join Date
    Sep 2015
    Location
    Viroqua, Wisconsin
    Posts
    179

    Default Re: Oughtred strong back box

    I think using LVL stockís a great idea for strongbacks. Ian likely didnít have such available when he conceived his box-beam idea.

    Setting them up at the beginning for dual use, as with the shelf pin suggestion, only extends their utility, reducing the initial outlay by spreading it across future use.

    (Curiosity got the best of me to edit this asking grey duck what use he has in his shop space for artificial grass?? That green sure stands out....)

  5. #5
    Join Date
    Mar 2009
    Location
    Billings, Montana
    Posts
    900

    Default Re: Oughtred strong back box

    My box has been around for about 15 years and I've built three boats on it. No wheels on mine - we just drag it around when necessary. Current project is Wee Lassie II.

  6. #6
    Join Date
    Oct 2000
    Location
    Padanaram, MA USA
    Posts
    9,902

    Default Re: Oughtred strong back box

    Iíve had a couple of box beams made of two I-beam joists with plywood top and bottom. My longest was 26í.
    Itís convenient that the beam is movable. THe height of the boat can be adjusted to make a job easier. Iíve used mine as basis for a long work table for lofting and spar building.
    Theyíve stayed perfectly straight, even when stored outdoors.

  7. #7
    Join Date
    Jan 2009
    Posts
    352

    Default Re: Oughtred strong back box

    I've got a pair of galvanized steel studs - I think they are 8" x 16' - with 3/4" plywood screwed onto them Use them for 20 years with various boats and projects. Straight as an arrow after all this time.

  8. #8
    Join Date
    Nov 2016
    Location
    Kingsville, Ontario
    Posts
    731

    Default Re: Oughtred strong back box

    E40F3B2C-F5D4-45BC-B4DC-8D62FFB9F1E5.jpg

    This is mine, 2x2’s and OSB, strong, straight, cheep and disposable.

  9. #9
    Join Date
    Apr 2015
    Location
    St. Helens, Oregon
    Posts
    2,468

    Default Re: Oughtred strong back box

    Quote Originally Posted by L.A Marche View Post
    E40F3B2C-F5D4-45BC-B4DC-8D62FFB9F1E5.jpg

    This is mine, 2x2’s and OSB, strong, straight, cheep and disposable.
    ...and providing access to the inside it looks like.

  10. #10
    Join Date
    Jul 2007
    Location
    Charleston, SC
    Posts
    246

    Default Re: Oughtred strong back box

    love all the different approaches. the green astro turf is a rug for my fishing station where I stand and do lures and rigs - a real rug wouldn't last cause my dogs chew them to pieces - this they just play with when I'm at work and you just throw it back in place

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