Winch Rigging and Anchor loads

[Rob]

The 12 tons would include whatever safety margine you build in....

[ghosthunter]

Good feedback and anecdotes.

So when looking for anchor material, do you buy for working load or max breaking load?

As in, a snatch block may have a 10 ton working load limit and a 15 ton max breaking load.  If you need, say 12 tons for an extraction, would this block work?  I am assuming not.

It’s possible I think. But I would add another block. A block working load should equal the load.Add a second block and you are covered as I see it.  That’s what I would do.

[hunter399]

Good feedback and anecdotes.

So when looking for anchor material, do you buy for working load or max breaking load?

As in, a snatch block may have a 10 ton working load limit and a 15 ton max breaking load.  If you need, say 12 tons for an extraction, would this block work?  I am assuming not.

It’s possible I think. But I would add another block. A block working load should equal the load.Add a second block and you are covered as I see it.  That’s what I would do.

Don't ask what I would do.
If that block is from hobo frieght ,I wouldn't push it too far past the limit.

[KFhunter]

It's not really rocket science, use tree anchors and blocks you couldn't possibly break, and bag the winch line or at least stand well clear.   

[hunter399]

It's not really rocket science, use tree anchors and blocks you couldn't possibly break, and bag the winch line or at least stand well clear.

Ding ding ding.
No one stands outside the truck.
Getting firewood your in
the truck when I'm pulling stuff.
Plus sometimes I will pull stuff down the road if there is a shady spot close by.

[Rob]

I guess I am just looking for the principles so I can make good decisions.

I hear folks say they want a margine of 3x for anchors and i see two ratings on materials.  How are those folks calculating 3x?   WLL or MBL?

I also understand from my rock climbing days that there is an anchor that is perfect, and one that is good enough.  In other words you can add more gear and improve the security of an anchor but that comes at the expense of gear and time.  Or you can build something that will sustain a fall factor of 2 with some margine and call it good.

I see people making a judgement call based on experience and since i dont have the depth of many on here, i don't yet trust my judgement so I need to know the principles.

[KFhunter]

You can winch yourself out with two logs and a rope 

[hunter399]

You can winch yourself out with two logs and a rope 

Some that trusty paracordage.

[hunter399]

I guess I am just looking for the principles so I can make good decisions.

I hear folks say they want a margine of 3x for anchors and i see two ratings on materials.  How are those folks calculating 3x?   WLL or MBL?

I also understand from my rock climbing days that there is an anchor that is perfect, and one that is good enough.  In other words you can add more gear and improve the security of an anchor but that comes at the expense of gear and time.  Or you can build something that will sustain a fall factor of 2 with some margine and call it good.

I see people making a judgement call based on experience and since i dont have the depth of many on here, i don't yet trust my judgement so I need to know the principles.

I would trust your judgement
Only you know what your truck wieght,winch,all that.

[Rob]

Ok.  Thanks anyways!

[Rob]

If i can find a good resource on the physics of these systems I will post it.

[ghosthunter]

I guess I am just looking for the principles so I can make good decisions.

I hear folks say they want a margine of 3x for anchors and i see two ratings on materials.  How are those folks calculating 3x?   WLL or MBL?

I also understand from my rock climbing days that there is an anchor that is perfect, and one that is good enough.  In other words you can add more gear and improve the security of an anchor but that comes at the expense of gear and time.  Or you can build something that will sustain a fall factor of 2 with some margine and call it good.

I see people making a judgement call based on experience and since i dont have the depth of many on here, i don't yet trust my judgement so I need to know the principles.

 Go try it.  Get a buddy set up couple winching scenes and try it before you need it. Than carry what works for you.

[hunter399]

The science stuff ....
All I know is every time you loop through a block you reduce what your winch pulls by almost half.

You see a crane with a block and the cable loop though a few pully on a single block.
Same principle winch on crane is only gonna lift so much.
So you increase lift,pull,whatever that way.

[hunter399]

I guess I am just looking for the principles so I can make good decisions.

I hear folks say they want a margine of 3x for anchors and i see two ratings on materials.  How are those folks calculating 3x?   WLL or MBL?

I also understand from my rock climbing days that there is an anchor that is perfect, and one that is good enough.  In other words you can add more gear and improve the security of an anchor but that comes at the expense of gear and time.  Or you can build something that will sustain a fall factor of 2 with some margine and call it good.

I see people making a judgement call based on experience and since i dont have the depth of many on here, i don't yet trust my judgement so I need to know the principles.

 Go try it.  Get a buddy set up couple winching scenes and try it before you need it. Than carry what works for you.

Try it first is a great idea.

[Rob]

Definitely plan on trying all this out once I understand the basics (and get the winch mounted!)