Crane Sling Hooks

chris_girard

chris_girard

Branched out member
Location
Gilmanton, N.H.
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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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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These hooks need to be set right and carefully. They can come undone if attention is slack. Not so much when in the air but when the piece is set down or moved around.
The gate can be held open by a nub of bark even when properly attatched
 
[/ QUOTE ]These hooks need to be set right and carefully. They can come undone if attention is slack. Not so much when in the air but when the piece is set down or moved around.
The gate can be held open by a nub of bark even when properly attatched

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Mark, I’m not disagreeing with what you are saying, the hooks definitely have to be set correctly, with the hook gate in the down position, so the sling bites into the hook and not the gate. Just the way that you would set a logging chain around a log to bight into a grab/slip hook when skidding logs.

What I found, was that the round slings that we were using at the Crane Workshop, were still very well secured, even when the load was resting on the ground and I was trying to unhook them. I unhooked a lot of pieces in two days and I actually found that with the type of round slings that we were using, these slings were not moving around by themselves, even slacked. I actually had to take one part of the sling out of the hook at a time, because when I tried to take both parts out of the choker position, they were getting caught in the gate.
 
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that thing isn't meant to be bent around a load. why not just use a shackle? cheaper and safer.

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Jeff, I have to disagree with you on that one, because I specifically checked with the Swedish hook manufacturer and here’s what they say:

“There are several ways to choke a load using round slings. I've attached a Gunnebo product catalog for your reference. If you will look on page 28, tables 3 and 4 you will see chain slings choked in two different manors. The choking does affect the capacity of the sling. Yes, the RH style hook can be used in either style of choke as long as the hook capacity is not exceeded.”

I will try to attach the catalog, so people can see the different choking configurations. It's basically like I said to Mark above, you are choking similiar to the way you would a logging chain to a grab/slip hook. The upward pressure on the sling from the crane causes it to bight into the hook and hold it securely. These Gunnebo hooks are made to do this.

The reason why not to use shackles, is this way was quicker and easier than messing with a shackle up in the trees.

Remember, we were using Mayer's crane's and slings and these guys are a very fast, high production, AND safe company.
 
We switched to round sling-"joker hook" combo about 1.5 years ago and have only had one come undone, basically as allmark desribed, just before the load was completely on the ground the hook which wasn't put on properly opened. After that we had a training session about how to properly put any type of sling on and the importance of doing so.
 
We have used the Round Sling Hook on a few jobs and we really like them. They are very fast to connect and they do save time on the job but you do have to make sure that they are set correctly or you could have some big issues. We are hesitant to buy our own just because even with all the training and tailgate meetings we feel that the current way we do things is fine. Everyone knows that this industry is hazardous and if things go south quick someone can get killed and we do not even want to go there just over a few minutes saved.
 
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Remember, we were using Mayer's crane's and slings and these guys are a very fast, high production, AND safe company.

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hmmmm. kinda makes you wonder where they got the idea from doesn't it, chris..............
 
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that thing isn't meant to be bent around a load. why not just use a shackle? cheaper and safer.

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lol. keep thinking that way, idiot.
 
i am not advocating the shackle use, linus. i am just simply hopping on a fool who knows not of what he speaks.

them hooks are the bomb for crane use. the bomb. how that altec of yours running?
 
OOPS, I did not mean to get in the middle of things-lol. We have used Mayers hooks before and I just wanted to give my 2 cents on them. The Altec is working out great for us, we love it. We have a lot of pictures of it in use on our facebook site under Murphy Brothers Tree Service, Inc. if you care to look.
 
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that thing isn't meant to be bent around a load. why not just use a shackle? cheaper and safer.

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lol. keep thinking that way, idiot.

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That is why I checked with the manufacturer before posting this thread. I knew that they were safe.

I don't know why others don't think so. Like I said those things are build to be loaded that way, you just have to know how to do it.
 
an idiot huh. have you seen a five hundred pound load fall off a hook because it slipped over the mouse on the hook due to twisting? hell if all we are interested in is speed then why use hooks with mouses at all? why not use one of these: http://safetysling.thomasnet.com/viewitems/fittings-hardware-hooks/sorting-hooks? when speed is king these hooks have no equal. i wouldn't rigging loads to be flown over my head or targets but in yalls case.......... speed is king right. i have seen to much crap happen rigging to trust a moused hook on a sideways choke. a shackle is good cheap insurance. put a keeper string on the pin or carry a diddy bag. you can call me slow and dumb till the day i die but i won't have failed rigging falling on my head or my clients houses. speed is bull-__- when an accident happens, all that speed for nothing.
 
To each their own. I wasn't trying to start a fight.

Just wanted to show another way of crane rigging, that can be very efficient, WHEN used correctly.

I also wanted to let people know that those hooks WERE made to be choked off like we did with Mayers, and that they are safe.

Like I said before, I try to do my homework before posting something that has no relative use, and is dangerous in treework.
 
i'm not fighting. how come on tree buzz everybody is so sensitive? we are a a public forum and others have a right to a deference of opinion? i'm going to call the manufacturer and explain exactly what is being done with these hooks and get them to email me a reply. i don't care that ol' dirty called me an idiot. i think its funny really. in my opinion side loading that hook is bad news, but for the sake of argument i will call the manufacturer and explain that the hooks are side loaded into a tree trunk (which may make a difference because it is wood and will deform during the loading of the hook) and that the loads are hung perpendicular to the bight of the choke. i really want to know what their reply is going to be.
 
hey cockring. how are you going to call gunnebo and tell them exactly how the hooks are being used when you have no clue yourself?
 
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