Strength of a knot takes out of climbing line?

[bob]

must be me then

i have broken several lowering lines

and a couple of climbing ropes when inappropriately used

and snapped lowering point out once:blushing:

[Dean Lofthouse]

must be me then

i have broken several lowering lines

and a couple of climbing ropes when inappropriately used

and snapped lowering point out once:blushing:

 

Your just an hooligan

[MOG]

there was diffienately some useful information in there but not a answer i was looking for. but i suppose 40-60% will do.

 

Also seen a few ropes snapped, mainly old climbing lines for pulling trucks out. and more other than not, snapped in the middle or away from the knot. i think is due to rope wear, maybe knicks in rope, sun damage, age etc. thats were there not for climbing.

 

But one with a guy who thought he is a arborist. lowering head out of pine tree on a steel carbineer and snap lowering rope. think it was an old line too tho. and more other than not, snapped in the middle or away from the knot. i think is due to rope wear, maybe knicks in rope, sun damage, age etc. thats were there not for climbing.

 

As to question before, i use a splice and alpine butterfly on same line for my rope guide.