were run in the laboratory on a variety of ropes using 5/8" hog rings to
form an eye with the following results:
hog rings forming an eye in 3/8" poly-dac had an average strength of 470
hog rings forming an eye in 3/8" poly-dac had an average strength of 605
hog rings forming an eye in 3/8" poly-steel had an average strength of
hog rings forming an eye in 5/16" poly-dac had an average strength of 580
significant variation was noted between wet and dry tests.
Also, the length over which the hog rings were distributed ( from
6" to 12") didnít significantly affect the strength. [click here
for picture hog.jpg]
the Shelf Weak Links
Modern Mould Sliplink tm is a knotless system based on the same
theory as a jam cleat. In its
present configuration its holding strength is 400 pounds. [click here
for picture mm.jpg]
Lobster Vents, Inc. is currently
developing a swivel that incorporates a weak link.
It can be manufactured for different strengths (500, 600, 1100 etc.) as
required. They are expected to be
available around the first of the year.
[click here for picture plante.jpg]
Strength Weak Links
weak link technique suitable for higher loads is a spliced jumper.
The jumper is selected based on breaking strength data from the
manufacturer. [click here
for picture jumper.jpg]
lines can be marked in a variety of ways.
Shown below are three simple methods that were tested and found to work
satisfactorily under normal conditions. At
the top, colored twine is seized around the line and woven between the
strands. In the center the line
was spray painted. This method
requires that the rope be dry. At
the bottom, colored electrical
tape was wrapped in one direction and then back over itself to form two
layers. [click here for picture marking.jpg]