got my ass whupped

[Daniel]

it was an experiment and a demonstration.... that's the only cut that peaked out over 1550 all day, which is close enough to a 20% WLL for my liking. All but one piece on the tree was taken with 3-4 wraps and no run, just to demonstrate the importance of stretch in a line..... no to derail... just saying that if he had used true blue, the lighter rope may have held where the heavier line with less stretch failed.. yale cordage shows the youtube video clearly proving this principle...

 

[treehumper]

Once the piece is running then it needs to keep going or a gentle application of "air brakes". The combination you are talking about goes to duty cycles. Sometimes it seems we forget that each loading of a piece of gear reduces its life and thus it's rated capacity.

 

[Stihlmadd]

how do you tie the block off?

standard whoopee sling doing as you getting the neck up snug as possible to reduce the drop.

also how much stretch in that line?

from the mobile phone video that one of the customers took I reckon the rope snapped at the apex of the stretch and would agree that the combination of the short run and the low stretch seemed to find the weakness in that particular rope as this senario has played out before - Pine top + short run = rope failure snapping the rope on the stretch factor.

how was it tied off? Did the biner cut the line?

failed at the first half hitch not at the third hitch terminating point of the carabiner.

Do you mean yale bullrigger?

sorry my bad Yes that is the Yale bull rigger - correct.

how much play was there between the cut and the block when it was loaded?

between 1' and 1 1/2 '

 

[Daniel]

I don't like setting blocks with whoopie slings.. You can get them snugged up better with a straight sling and cow hitch

 

[jabezkin]

Glad it turned out well. Meaning it could have been worse.
I'm here to learn. So I read these.
Do hurricane relief and want to go to the next level.
Lots of reading here and then school in my mid 60s. Lol

But I do lots of rigging. Overhead crane with shifting loads.
Had a drop a while back. 26,000 lbs from 29'

Left a ding in the floor. But it could have been prevented.

I guess in my world it's fuck it fly it.
As in fly it down the bay.

Great forum.