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    Knot strength
    From: Lu Abel
    Date: 1999 Apr 06, 12:12 PM

    Sorry this question is way off the topic of navigation, but I can't seem to
    find an answer and maybe this erudite group can point me in the right
    direction.
    
    I'm looking for some definitive, original-source data on the strength of
    various common knots (bowline, sheet bend, etc) vs the strength of the
    original rope itself.
    
    I spent about two hours last night searching the Web for info (including
    visiting the Cordage Institute, major rope manufacturers, and lots of Web
    sites and newsgroups) and came up empty handed.  Most sites simply assert
    that "knots reduce the strength of a rope" but don't give specific
    degradation data.  Two or three sites that give specific degradation
    factors (claiming, for example, that a bowline reduces rope strength by 15%
    to 40%) but the source of the testing is not cited and I fear the info may
    be hearsay.
    
    Ditto for Chapmans -- they have a table of knot strengths, but no citation
    as to the source of the data or even what sort of rope was tested (I would
    expect, for example, that there might be differences between manila and nylon)
    
    Any help would be appreciated.
    
    Thanx
    
    Lu Abel
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