aka materials - structural strength question

Discussion in 'Multihulls' started by Anatol, Jan 16, 2016.

  1. Anatol
    Joined: Feb 2015
    Posts: 191
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    Location: los angeles

    Anatol Senior Member

    context: relatively low tech 30' multihull.
    I'd planned to build akas (crossbeams) from glass over ply, 1/2 ply, 8'x12' or so. I am also considering aluminium tube, something in the order of 6" dia, 1/4" wall. These beams are (say) 8' long. I understand there are several dimensions of strength (and strength to weight) to consider. I'm looking for general rules of thumb regarding the performance of these materials - or others - in this situation.
    thanks!
     
  2. Ad Hoc
    Joined: Oct 2008
    Posts: 6,500
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    Location: Japan

    Ad Hoc Naval Architect

    If you know the basic scantling (size of the beams/member) and if you know the material properties (aluminium or other), then you can easily establish that strength the member has under a loading of a given length/span.
     
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