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Simple Reduntancy

T

Tradman

New Member
Joined
Oct 10, 2019
Messages
12
Being a Tradbow Hunter and loving simplicity yet believe in "two is one and one is none" I came up with this bridge idea. It is essentially only one cord but being it uses Prusik style wraps, even if one of the two bridges was severed it would still hold 100% of your weight. Double fishermans knots with buried and tacked tails. I used 1/4" Amsteel but it can be done with 8mm canyon rope.
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2" buried.
The knots are not supporting 100% of the load. Bowlines in climbing are frowned on as well yet I have seen them used with no problem. I have used double fisherman to connect two winch lines on my Farmall A and they are fine full load. Besides if it was to fail that is why there is a second bridge which was I was looking to do.
 
Sziggy2.0 said:
How long is the bury? Knots and amsteel are frowned on.
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some folks use it for adjustable bridges with friction knots too. I’d feel confident with that bridge holding me. I even like that knot he has on there and worst case it may become a big ball by melting together.
 
Amsteel is an amazing material but I am still cautious when using as a bridge. It is awful slick to be very good for knotting. A secondary bridge is a good idea.
 
Agreed but when using a jam style knot like a double fisherman it will break before slipping. There are tests out there. I use knots on my tractor winch to lift a front plow and rear plow etc. Have pulled the tractor out of the mud and never had the knots fail.
cedar paul said:
Amsteel is an amazing material but I am still cautious when using as a bridge. It is awful slick to be very good for knotting. A secondary bridge is a good idea.
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There are other factors with using for a bridge such as stressing at the same point when suspended and wear issues. When used in a pulling situation it is a great material and in reality the amount of time the average time a saddle hunter spends in it would not present an issue. I have been tying double fisherman's on my work saddles for a dozen years and that is a fine knot but with such a slick material such as Amsteel maybe not the best choice. I use a bowline in all kinds of winching applications and it is outstanding but not good for tension/ no tension situations where it could possibly loosen. Knots,bends and hitches are great tools around the homestead. I used to be a rigger on dive jobs when I was a hardhat diver in the Navy and it is good to remember some of the techniques we used to use to move some massive equipment.
 
cedar paul said:
There are other factors with using for a bridge such as stressing at the same point when suspended and wear issues. When used in a pulling situation it is a great material and in reality the amount of time the average time a saddle hunter spends in it would not present an issue. I have been tying double fisherman's on my work saddles for a dozen years and that is a fine knot but with such a slick material such as Amsteel maybe not the best choice. I use a bowline in all kinds of winching applications and it is outstanding but not good for tension/ no tension situations where it could possibly loosen. Knots,bends and hitches are great tools around the homestead. I used to be a rigger on dive jobs when I was a hardhat diver in the Navy and it is good to remember some of the techniques we used to use to move some massive equipment.
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You know more than I on the subject. The bowline with Yosemite finish was invented to your point.
 
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