Stringer Bedding & Continuity Importance?

Discussion in 'Fiberglass and Composite Boat Building' started by Shawn Barlow, Dec 4, 2019.

  1. Shawn Barlow
    Joined: Dec 2019
    Posts: 1
    Likes: 0, Points: 1
    Location: Canada

    Shawn Barlow New Member

    In a new, large hull layup, is it necessary (beneficial?) to have a strong adhesion of the bottom of the stringer to the hull (epoxy, resin, fiberglass etc), or does the mechanism of the fiberglass encasement of the stringer to the hull provide the required structural connection to the boat? Similarly, should gaps (to accommodate hull shape) between stringer sections (or lateral "rib" sections) be avoided due to possible reduction in structural strength? Basically, both questions are about creating the best structural integrity possible.
     
    Last edited: Dec 4, 2019
  2. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    The encapsulation should do the job, but obviously discontinuity of the stringer is not desirable, as it is a structural element, not just a former for the encapsulating glass. If you are worried about discontinuities, put extra glass in those areas.
     
  3. kapnD
    Joined: Jan 2003
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    Location: hawaii, usa

    kapnD Senior Member

    The area directly beneath the stringer is ideally not hard resin/filler, I use a strip of about 3/8” foam cushion, so the stringer is not in direct contact with the bottom, but is joined to the hull by the tabbing.
    This is to avoid “hard spots” that could damage the hull layup when stressed.
    I find many Boatbuilder’s let resin pool up under the stringers when tabbing in, poor practice IMO.
    Not sure what you’re referring to in the second part of your question, photos or diagrams would help.
     
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