Crane Sling Hooks

OK, I only had time this morning to grab a quick picture of the way that we were setting the Gunnebo Crane Hooks at the crane seminar a few weeks ago.

This is just a “mock setup” on an Oak tree in my backyard. Ignore the SRT Porty setup that I have in the background. It was already installed in the tree.

As you can see in the picture, the choker position on the hook is greater than 90 degrees with sling positioned well in the belly of the hook. The gate is positioned facing downward and is shut tight. The slings are 3” polyester round endless loop with a 12,000lbs WLL in the choker position.

Like I said above, even when slacked, if you’re using 3” round slings, they don’t come undone. You have to take one part of the sling out of the hook at a time to get them out; otherwise the 2 parts don’t fit through the hook and gate opening.
 

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where did you get that Chris and how much?I really like using them at the workshop and If connected properly I dont see how they could possibly open under load.I guess if you put a clevis on not properly they also can come un done-i have never seen it though.But during the workshop we literally seen over a hundred picks with the sling hook and not one mishap.
 
Jimmy, I got a pair of the Gunnebo Hooks from St. Pierre Manufacturing Corporation out of Worcester MA. Same place that Mayer got theirs (I think). I already had the 3" slings which I purchased from Mayer Power Products directly.

Here's a link to the hooks:
http://www.stpierreusa.com/index.html

Ask to speak with Bob. He was at the workshop with us as one of the vendors.

The Gunnebo hooks aren't cheap, I can tell you that. I don't have the exact price in front of me, but will find out for you. For their ease in setting, and using, I feel that they are worth it and will save you money in the end.
 
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during the workshop we literally seen over a hundred picks with the sling hook and not one mishap.

I wonder how many picks Mayer has seen done with them without a mishap?

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That is what I was saying too Jimmy. I unhooked A LOT of picks in those 2 days (which were wet too, remember) and never had any problems with slipping.

We set picks with those hooks in all kinds of different positions too. Med. sized limbs all the way up to large trunk wood......No Problems.
 

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chris can you get me a shot of that same pic from the sides looking kinda behind the hook? also what if you are doing branches and the piece endows? how does the hook respond then? and to down to what diameter are the hooks used too? thanks
 
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chris can you get me a shot of that same pic from the sides looking kinda behind the hook? also what if you are doing branches and the piece endows? how does the hook respond then? and to down to what diameter are the hooks used too? thanks

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Jeff, I would gladly take more photos, but the sling and hook isn't in the tree anymore and I'm going in for elbow surgery tomorrow and will be out of commission for a few months.

Maybe someone else has pics?
 
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On smaller diameter branches its better to wrap around the limb once or twice before hooking these hooks on, it gives a better grip and puts much less bending force on them.

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Classic is right and that is the way that we were doing it down at the workshop with smaller sized limbs. I don't remember specific limb dia. that we went down to.

We were also using spider legs on smaller limbs in conjunction to the hooks.
 
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I wonder how many picks Mayer has seen done with them without a mishap?

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why don't you ask me?


been using these hooks for almost 2 yrs now.

(yet to see a mishap of any size yet btw regarding the use of these hooks)




don't you just hate it when you wrong, cockring? wrong on every aspect and thought? stay hot, mutt.
 
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Here’s a link to the Swedish made sling hooks that we used a couple of weeks ago at the Crane Workshop. We were using the RH 5-ton Gunnebo Round Sling Hooks with 15,000lb 12’ round (endless loop) slings and 18,000 lb 20’ round slings.

I checked with the distributors at St. Pierre Manufacturing Corp. out of Worcester MA, whether they could be used with Eye And Eye slings for those that prefer those types of slings and they said yes, they will work just fine with either synthetic round or web slings.

http://www.gunnebojohnson.com/gunnebo-cl...or-round-sling/

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They are a top of the line company!
 
Without a doubt they are a top of the line company. When I requested technical information about the Gunnebo Hooks, they replied via e-mail withing an hour with the information that I requested, plus a full on line catalog of their products.
 
We have been using the hooks for the same amount of time that the company Oldirty works for has. We discovered them while working together at one of our suppliers. Have never let us down, haven't heard of them opening up by mistake once. Make sure you orient them so the gate is pointing toward the ground and you're good to go. gates on these are rated at somewhere around 80lbs, so proper orientation is vital. Think of them as a carabiner, never load the gate.

The company Oldirty works for uses a few different sizes if I'm not mistaken?
 
Thanks for giving us some more info on the Gunnebo hooks Bull.

I think that we've pretty much established their safe use, when set correctly.

One issue that I have with them, as well as with clevis shackles, is when you unhook the piece on the gound, such as a big stem with no branches on it,and need to pull the sling and hook out from under the piece.

OSHA states that a sling shall not be pulled out from under a load resting on top of it, but I know that we all do it from time to time.

What's the best way to pull these hooks out when, say you're stacking a load of logs on a cold deck and you don't want the hook to get stuck while pulling it out from under the load? Would you use some kind of cribbing, and if so, how do you keep the logs being stacked stable if cribbibg is used?
 
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