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  1. #11
    Senior Member
    Join Date
    Feb 2008
    Location
    north carolina USA
    Hammock
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    Possible reason found for spreader bar failure

    I designed my bridge hammock to run 7/64" amsteel for the suspension arcs thru fabric tubes - not sewn to the fabric. At the ends of the arcs I had fixed eye loops spaced exactly 80" apart, the length of the hammock body. I had the spreader bars running thru fabric tubes to keep the hammock body from slipping.

    After the .433 easton aluminum foot spreader broke, I reassembled the hammock, but noticed that the suspension arc amsteel seemed too long.

    IT WAS - IT WAS NOW 83" (versus the original 80"). Both of them stretched the same length. Oh my aching back.

    I have been using amsteel for whoopies and never knew that it stretched, since stretch is not noticable in whoopies (they are constantly being readjusted).

    LESSON LEARNED - PLAN FOR 3" OF STRETCH OVER 80" FOR 7/64" AMSTEEL OR PRESTRESS YOUR SUSPENSION PRIOR TO ASSEMBLY.

    Hangnout figured it out, if you read his post.

    .433 easton tubing will probably work fine for you potential bridge builders, but I am still moving up to .625.

    Happy Trails, Happy Hangs

  2. #12
    Jsaults's Avatar
    Join Date
    Sep 2009
    Location
    Pittsburgh PA
    Hammock
    HH, CJH NX-250, WBBB 1.7 dbl
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    Std, Hex, or WBSF
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    Poly web w/AHE buc
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    1,545

    Brian: Wow!

    That was some impressive strength gain in up-sizing. Thanks for applying your education to the most important subject in the world (hammocks, of course!).

    Jim

  3. #13
    Senior Member
    Join Date
    Feb 2008
    Location
    blue island ,Il
    Hammock
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    down,over & under
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    2
    the stress must be all cpmpression, keep the spreaders in direct line with the lines. I have been using rather lite carbon fiber colapsable ti goat poles, just keep everything in a direct line// gnome

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