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Thread: Deconstruct-able tiny pontoon

  1. #1
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    Cool Deconstruct-able tiny pontoon build

    Yesterday i started working on my deconstruct-able tiny pontoon.

    The whole pontoon is only 2x2 meters (6.4x6.4feet). I build it to gain experience with building pontoons and plan on building a larger one in the future.

    The floater thingy:

    (it will have a angled front, but otherwise square)

    The floater will contain 3 dividers that will also hold the beams for the main platform:

    (i'll soon post a picture of the inside)

    This should be a great spring/summer project! Of course it is very simple/basic compared to other build topic, but you need to start somewhere :-)
    Last edited by tinus; 05-28-2019 at 10:13 AM.

  2. #2
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    Default Re: Deconstruct-able tiny pontoon

    3d of the floater thingy:

  3. #3
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    Default Re: Deconstruct-able tiny pontoon

    I think it would be easier to build a long box with partitions every 4 feet and the top overhanging the edges by the thickness of rub rails on both sides then thru-bolt the joists down thru the ply and the rails with no need for all of that extra joinery. In other words, I think you're over engineering it.

    I would frame the partitions with 2x4 on the flat all the way around and epoxy glue all of the joining surfaces and saturate the inside with Timbor before closing it up.

    Butt joints in the ply can be splined or shiplapped in thickened epoxy. Fasteners can be simple hot galvy nails if you're going to glass the outside.

    The bow should slope a lot more too, like 60 degrees.

    Once you have the joists bolted in place you can bolt 2 more running fore and aft under them back aft extending out far enough to add an outboard bracket of some sort.

    I've been designing this in my head for years now. Simplicity is the key.

  4. #4
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    Default Re: Deconstruct-able tiny pontoon build

    What is this for?

    Square (rectangular) boxes as a pontoon or an outrigger seem to me to be the worst of all shapes for use on a boat that moves.

  5. #5
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    Default Re: Deconstruct-able tiny pontoon

    Cheers @Gib Etheridge, it is likely a bit over engineered, but if i go bigger most common (simple solutions) won't likely scale well. Your idea makes a lot of sense i will see if i can intergrate a few details in my next design. I've taken freedom to directly borrow your idea about a more sloped bow.

  6. #6
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    Default Re: Deconstruct-able tiny pontoon build

    @upchurchmr the floats do have a little bow and with @Gib Etheridge i increased the slope of the bow.
    The pontoon will most of the time just float in a nice quite spot and is not really for boating, maybe move it when the weather is quiet.
    I don't plan on boating distances, it's for having a little spot out on the water.

  7. #7
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    Default Re: Deconstruct-able tiny pontoon build

    I had a madly busy week. Last Sunday i did make 2 additional dividers.

    Here's the inside of one divider:


    Here are all 3 waiting for epoxy threadment:

  8. #8
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    Default Re: Deconstruct-able tiny pontoon build

    All nicely stacked after the epoxy:


    Added a few loose screws (the wood isn't very good and straight):

  9. #9
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    Default Re: Deconstruct-able tiny pontoon build

    Today, trying bow constructions, tried three variations:

    Not really needed, but just nice to figure out.

    This was the final one:

  10. #10
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    Default Re: Deconstruct-able tiny pontoon build

    After messing around with the bow i decided to take my rubber hammer and put a few things together:


    Late afternoon:

  11. #11
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    Default Re: Deconstruct-able tiny pontoon build

    Tomorrow (if the weather is not too cold, doing this in a unheated garage) i'll do the bow framing and put the plywood on 3 sides and epoxy the wood connections on the inside.
    That should fill up a day nicely

    [edit] quick preview of the new bow slope:

    (not as sloped as wanted, but still slopy-er than before)
    Last edited by tinus; 05-25-2019 at 02:00 PM.

  12. #12
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    Default Re: Deconstruct-able tiny pontoon

    Starting the bow framing very simple:


    A few helper parts to keep everything together:

  13. #13
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    Default Re: Deconstruct-able tiny pontoon build

    Putting everything together:

  14. #14
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    Default Re: Deconstruct-able tiny pontoon build

    Last minute decision for a extra beam to support the bottom plywood:


    And fitted after some weird vertical sawing exercise:

  15. #15
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    Default Re: Deconstruct-able tiny pontoon build

    Adding the front/bow plate: (and my new little working stool in the background)


    And the right side:


    And the left side:


    Can't do the bottom yet, cause the left/right side bottom needs a bit sanding. And can't sand until sides connect strongly to frame using epoxy, currently sides are bolted in place which isn't strong enough for good sanding.
    Last edited by tinus; 05-27-2019 at 04:56 AM.

  16. #16
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    Default Re: Deconstruct-able tiny pontoon build

    If i get bored i can simply put a seat in this one and boat away


    The bow seem to be not 100% entirely straight, i'll blame it on the bad wood:


    Not sure what to do with the middle bottom beam, maybe i'll attach it to the front plate so it supports it:


    Just a nice little photo of how everything comes nicely together:


    Thanks for viewing
    Last edited by tinus; 05-27-2019 at 05:03 AM.

  17. #17
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    Default Re: Deconstruct-able tiny pontoon

    Replaced the bow with a lighter thinner version, the whole thing was becoming a bit too heavy.
    r_20190530_105728.jpg

  18. #18
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    Default Re: Deconstruct-able tiny pontoon build

    Epoxy-ing the sides:
    Attached Images Attached Images

  19. #19
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    Default Re: Deconstruct-able tiny pontoon build

    While epoxy dries starting on the second floater, the dividers first:

  20. #20
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    Default Re: Deconstruct-able tiny pontoon

    Epoxy on the other side:

  21. #21
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    Default Re: Deconstruct-able tiny pontoon build

    Bottoms up!

  22. #22
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    Default Re: Deconstruct-able tiny pontoon build

    There is a problem, time to be creative:

  23. #23
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    Default Re: Deconstruct-able tiny pontoon build

    Sneak preview

  24. #24
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    Default Re: Deconstruct-able tiny pontoon build

    Epoxying the bottom:

  25. #25
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    Default Re: Deconstruct-able tiny pontoon build

    Instead of watching epoxy dry i finished 3 dividers:

  26. #26
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    Default Re: Deconstruct-able tiny pontoon build

    Unplanned patching up the outside, filling screw holes and imperfections:

  27. #27
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    Default Re: Deconstruct-able tiny pontoon build

    Messy messy:

  28. #28
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    Default Re: Deconstruct-able tiny pontoon build

    Sanding, one of my favorite jobs:

  29. #29
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    Default Re: Deconstruct-able tiny pontoon build

    Making the sides a bit stronger with glass fiber:

  30. #30
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    Default Re: Deconstruct-able tiny pontoon build

    Time for another sanding session:

  31. #31
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    Default Re: Deconstruct-able tiny pontoon build

    Added fiber cloth to the bottom:

  32. #32
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    Default Re: Deconstruct-able tiny pontoon build

    Sanding time:

  33. #33
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    Default Re: Deconstruct-able tiny pontoon build

    Painting a extra layer with epoxy, shiny result:

  34. #34
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    Default Re: Deconstruct-able tiny pontoon build

    All the things you need for a successful first test, including last minute peddles:

  35. #35
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    Default Re: Deconstruct-able tiny pontoon build

    It floats and is water tight:

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