Double Esterlon

[Arborlord]

Hey guys just ordered some 16mm yale double esterlon lowering rope does any one know the working load. Any one on here have it how they get on with it.

 

I am hoping this is all the lowering rope i will need got 45m.

[Mani]

on that rope I'd use 500kgs as a rough guide for a max safe working load.

[Peter]

16mm = 5/8"

 

MBS 15120 lb = 6858 kg (from yale website)

 

SWL at safety factor of 10:1 = 658 kg

 

Dont forget of course this is the maximum static load, not the weight of the biggest chunk you can snatch on it!

[Rupe]

Honey Brothers list it as 7600kgs and Proclimber list it as 7394Kgs.

 

My loler sheet says 7500 10:1 =750kgs swl

[Rupe]

I use it all the time, its my main lowering rope. I've always had the 750kg figure in my head and thats the weight of my chipper! I figure I'm bever likely to be brave enough to cut something that weighs the same as my chipper and expect the rope and groundie/grcs to hold it!!

 

45m should be ok if not then a smaller lowering rope in a longer length would do as at 22m your are not likely to be rigging heavy stuff!

 

Heres some pics of it in action..

[Rupe]

I estimated those pieces as 680kgs using a green weight chart I found on tinternet.

[Rupe]

In this set up we were glad to have a little over 45m.

 

Take advantage of twin stem rigging whenever you can, it makes everything much smoother but does use up more rope.

[Peter]

To arrive at a figure of 750kg, you have to start with the average breaking strength (16,800lbs, 7348.19 kg)

 

10:1 SF, 750 kg ish.

 

I think HB are being a little optomistic.

 

I was under the impression that SWL should be calculated from the MBS rather than the average BS, but I could be completely wrong!

[Tom D]

I dont think you have to use 10:1 you can use 7:1 but the maths is harder.

[Rupe]

call it 650-750 ish then. you can't estimate a branch weight accuratly anyway so its all guesswork. 16mm is a good rope which will do most things, as long as you don't shock load it. Its all in the lowering device really.