Building a pontoon boat

Discussion in 'Metal Boat Building' started by calabash, Feb 10, 2016.

  1. calabash
    Joined: Feb 2016
    Posts: 2
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    Location: south africa

    calabash New Member

    Been lurking on this forum and getting ideas. Thanks to all of you!

    Taking a leap and am going to build an electric pontoon boat.
    I shall be purchasing 4 floats and 2 nose cones from this manufacturer ( )

    Thinking about building the frame out of 25mm square aluminium tubing and securing the pontoons with 6mm stainless flat bar. (Got some lying around)

    Am I on the right track here? Please advise.
  2. lance linked
    Joined: Sep 2015
    Posts: 25
    Likes: 1, Points: 0, Legacy Rep: 34
    Location: Pennsylvania, USA

    lance linked Junior Member

    most pontoon boats based on aluminum cylinders of similar diameter are bridged by Z girts. your 1" square tubing is too easily bent to be of much structural use unless you use it to build complex trusswork.

    6mm stainless bands would similarly be mis-proportioned, but in the opposite extreme.

    for a simple 8-10 foot wide framework you want 3" channel aluminum or 3" zee girts, and 3 mm X 3" wide banding of either stainless or aluminum, or thereabouts.
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