What is this rope designed for?

[MISteve]

Got this rope with a bunch of old ropes and pulleys. Can someone tell me what would the appropriate function be? It is 22 feet long and 9/16 diameter with a spliced loop on one end. Loop is about 10 inches. It appears to be a well made, tightly braided rope.




Shindaiwa 577 :: 100_0376.jpg picture by sgilbert9226 - Photobucket

 

[lone wolf]

It is a one eye sling you rap it around a tree and tie a cow hitch and a block goes in the eye.also used aloft for a false crotch with a block for lowering large chunks of tree.

 

[Tree Pig]

to tell you the truth looks like dock line to me... if your not sure of the origin I would question the WLL.

 

[lone wolf]

[video]http://www.sherrilltree.com/Learning-Center/Sling-Videos[/video]

click on eye slings in this

 

[MISteve]

to tell you the truth looks like dock line to me... if your not sure of the origin I would question the WLL.

I do not know its origin, nothing on it. would be nice to know the WLL. Any ideas?

 

[MISteve]

It is a one eye sling you rap it around a tree and tie a cow hitch and a block goes in the eye.also used aloft for a false crotch with a block for lowering large chunks of tree.

Thanks for the info. I had considered that but thought it was a little long. I guess too long is better than too short. Still need to figure WLL for it.

 

[lone wolf]

Thanks for the info. I had considered that but thought it was a little long. I guess too long is better than too short. Still need to figure WLL for it.

How long is it?

 

[MISteve]

About 22 feet, 9/16 diameter.

 

[MISteve]

[video]http://www.sherrilltree.com/Learning-Center/Sling-Videos[/video]

click on eye slings in this

Thanks for the Sherrill sit info.

 

[Tree Pig]

No way of knowing for sure but looks like a standard poly braided line quite common in dock lines in 20 to 25' lengths. Which is also a very common size for rigging eye slings. But most rigging slings are stable braid or better. Hard to say on the WLL but I would not have an issue with using it for securing a block for lite rigging as long as the rope is inspected and looks in good shape. But not knowing the origin and how it has been treated in its past it something you have to be careful with. Slings are not very expensive so the question is what are you really saving by using it?

http://www.iboats.com/5-8-x20-Pre-Spliced-Double-Braid-Nylon-Dock-Line-Gold-White-15-Eye-Splice-Seasense/dm/cart_id.502509016--session_id.520901081--view_id.373408

 

[lone wolf]

Well 9/16 aint no sling for seriouse work like chunking logs down 3/4 - 1 inch is but you could use it as an attachment point for pulleys when pulling by hand.

 

[Tree Pig]

Well 9/16 aint no sling for seriouse work like chunking logs down 3/4 - 1 inch is but you could use it as an attachment point for pulleys when pulling by hand.

great point LW it would be perfect for an extra block when setting 5-1 or something like that.

 

[MISteve]

It is in great condition, I was hoping it would be ok for medium to light rigging, since that is my skill level at this time.I am ok with dropping 6 to 10 inch branches.

 

[MISteve]

Looking at the end of the rope, it appears to be three strand inner core. The dock lines I see listed seem to be 5,000 to 8,000 lbs or more brake strength. That will still be 3,000 to 5,000 WLL ?

 

[Tree Pig]

It is in great condition, I was hoping it would be ok for medium to light rigging, since that is my skill level at this time.I am ok with dropping 6 to 10 inch branches.

Well even new 5/8 line similar (example above) has a WLL of 1000lbs you only have 9/16 so its going to be considerably less. 10" Oak log has a 1 ft log weight of around 35lbs. Not knowing the actual WLL on that rope I would be very careful going with anything that size and over like 10 feet long (log weight over 350lbs) at least over targets. Honestly like I stated before its not worth saving $40 it would cost to buy a good one. As stated save it for a setting blocks for pulling or maybe a second block when cradling a log from two rigging points, at least then the load is being shared.

 

[lone wolf]

Safe working load is ten percent of max rated capacity.

 

[MISteve]

Well even new 5/8 line similar (example above) has a WLL of 1000lbs you only have 9/16 so its going to be considerably less. 10" Oak log has a 1 ft log weight of around 35lbs. Not knowing the actual WLL on that rope I would be very careful going with anything that size and over like 10 feet long (log weight over 350lbs) at least over targets. Honestly like I stated before its not worth saving $40 it would cost to buy a good one. As stated save it for a setting blocks for pulling or maybe a second block when cradling a log from two rigging points, at least then the load is being shared.

Thanks for the input, light duty it will be.

 

[Tree Pig]

Looking at the end of the rope, it appears to be three strand inner core. The dock lines I see listed seem to be 5,000 to 8,000 lbs or more brake strength. That will still be 3,000 to 5,000 WLL ?

no breaking strength is the ultimate breaking strength, WLL is safe working load limit. its like 10 times less then breaking strength because when dynamic loading (letting something free fall then catching it on the line) the amount of force on the rope increases for every foot of fall. Something like a 1 to 1 ratio meaning a 35lb log falling 2 feet would put 70 lbs of force on a rope. So if the rope has a breaking strength of 5000 pounds and you drop a 1000lb piece of wood it falls 6 feet it will hit the rope with 6000lbs of force.

My calculations may not be exact but they are pretty close

 

[MISteve]

Well even new 5/8 line similar (example above) has a WLL of 1000lbs you only have 9/16 so its going to be considerably less. 10" Oak log has a 1 ft log weight of around 35lbs. Not knowing the actual WLL on that rope I would be very careful going with anything that size and over like 10 feet long (log weight over 350lbs) at least over targets. Honestly like I stated before its not worth saving $40 it would cost to buy a good one. As stated save it for a setting blocks for pulling or maybe a second block when cradling a log from two rigging points, at least then the load is being shared.

What is your source for weights of tree/wood. I sure would like to be able to better judge the weight of a branch,a section of trunk, or even just how heavy might that tree be?

 

[Tree Pig]

What is your source for weights of tree/wood. I sure would like to be able to better judge the weight of a branch,a section of trunk, or even just how heavy might that tree be?

http://www.google.com/url?sa=t&rct=j&q=sherril%20log%20weight&source=web&cd=1&ved=0CCYQFjAA&url=http%3A%2F%2Fwww.sherrilltree.com%2Fsite%2Fpdfs%2FLog_WeightChart.pdf&ei=rvIaT_CaGLLIsQKe9NHPCw&usg=AFQjCNFgfCEM_1upM7zvNnwNFFVOw3-ZnA&cad=rja