maintaining the rope as weakest link help?

[wrekin tree care]

Hi im new to rigging but understand basics been doing tree work for a while now. im in process of getting a light rigging gear set up. when i ordered my rope they ran out of 14mm double esterlon so then sent me 16mm i thought great. i now want a pulley strop etc but how do i maintain the rope as weakest link as its 7ton ish breaking strength that's some strop. i was looking at a large isc swing rated at 70 kn but i would need a karabiner to attach but they are only rated to 25knish aint they? and how do people get away with capstans as they are only rated to 1 or 2 ton?

[bob]

mbs is 7.5 ton ish so safe working load 750kg ish

some will disagree but generally 10-1

7-1 for strops

if you have 16mm rope generally 19mm for split tail to fasten pulley.

If you are using 16mm rope i would advise a cast pulley and a split tail to fasten to tree as a swing cheek will not take any realistic abuse or shock loading

[Adam Bourne]

Using hardware is always going to make it hard keeping the rope as the weakest link. instead of using binas just use knots or hitches work better, there are lowering devices out there that will take a lot more than standard capstans or porta wraps but keeping 16mm double estalon the weakest link is always going to be a task,

 

what size deadeye have you got?

 

sorry my bad you don't have one but bob has answered that anyway,

Edited June 13, 2012 by Adam Bourne

[Rupe]

Ideally a 16mm rope should be used with nothing smaller than an ISC medium cast pulley.