Moderator: Tim White
alfred wrote:You're right that Kingfisher is a marine rope, not purposely built for rappeling or caving, however since its material (polyester), diameter (10mm) and minimum breaking load (2300 kg) are right, what difference would it made unless the manufacturer is overly cheating?
alfred wrote:You're right that Kingfisher is a marine rope, not purposely built for rappeling or caving, however since its material (polyester), diameter (10mm) and minimum breaking load (2300 kg) are right, what difference would it made unless the manufacturer is overly cheating?
Also, to have a minimum breaking load, it takes at least some tests to yield a result which you can then call, based on the numbers you have in hand, a "minimum".
Considering 10x bodyweight MBL is used recreationally by some but the Fire brigade suggests 15x bodyweight, by being at 30x bodyweight is should be safe enough not to require an additional certification which as far as I know could be just a reason to slap a higher price tag on a rope.
Industrially, even if you aren't lifting live loads, it's not like you can accept like if it was nothing that a rope breaks (and the load crushes everything in its way) or you make a month's worth of work vanish due to poor materials. Surely, a lower loss than somebody's life, but putting things in that point of view seems like everybody in hauling and industrial duties is reckless and can afford to break a rope per month while working.
trogman wrote:One thing that I found helpful when rigging to a tree: always rig as high as possible. This will generally give you better clearance from the lip of the pit. This puts less stress on the rope, and also makes climbing out over the lip easier. This usually works better if there is a branch or knot in the tree just below your rig point, to keep the rope from slipping down the trunk.
Trogman
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