Laminating Plywood

Discussion in 'Boatbuilding' started by wdnboatbuilder, Mar 2, 2006.

  1. wdnboatbuilder
    Joined: Nov 2005
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    Location: Cape Coral Fl

    wdnboatbuilder Senior Member

    Cold mold build, every thing being the same, which would be stronger better to laminate 4 pieces of 1/8" ply equaling 1/2" or would it be stronger to laminate 2 pieces of 1/4"?

    I understand that the 1/4 and the 1/8 would have to be able to bend the same radius.

    The point of the question is that I'm trying to save weight although the wood is close the weight saving would come in the glue joint where you would only have one joint in the 1/4" than the 3 joints you get with the 1/8". It could be that it ends up the same but just looking for and value your comments.

  2. Raggi_Thor
    Joined: Jan 2004
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    Location: Trondheim, NORWAY

    Raggi_Thor Nav.arch/Designer/Builder

    1/8'' (3mm) is normally 3 plies, while 1/4'' (6mm) is 5 plies.
    This means you have a more balanced laminate with the 1/4'', with 40% in one direction and 60% in the other.
    With many layers of 1/8'' you can decide in which direction you want to have most of the fibres, with fewer layers of 1/4'' you will have almost the same strength in every direction.
    Of course you save some glue (weight, work and money) with fewer layers.
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