crane question

T

treejumper8016

I am an arborist of 8 years and I have still not been able to figure what OSHA laws state how a climber can tie onto the the ball. I have heard that using a rated clevis is acceptable, but then I have been told that you can not be tied in period. Any info would be greatly appreciated.
 
We're allowed to tie into the ball, just not the hook. The clevis will work fine as long as it's tied off.

<font color="green">The TreeHouse</font>

Every click a different pic!
dude.gif
 
treejumper;

Some info here:

Crane Best
Practices in
Tree Removal
Hoisting a
Qualified
Arborist

http://www.treebuzz.com/pdf/mar07-cb.pdf


It's in the Articles section here on TreeBuzz.



[ QUOTE ]
You can tie into the hook with a masterlink, as long as the hook is locked shut.

[/ QUOTE ]


ummm....technically, no.

From ANSI:


5.7.9 A qualified arborist may be hoisted into position utilizing a crane if the arborist is tied in
with an arborist climbing line and arborist saddle and secured to a designated anchor
point on the boom line or crane.
 
Bull I have no beef with you guys. Mayer is a stellar operation.

But, the intent of the wording of the Z was to prohibit people from tying-in to the hook. A casual reader might think that you condone the hook as a tie-in point. Your setup is safe, but it takes several additional steps beyond simply 'tying in to the hook' to create a 'designated anchor point' that you don't emphasize and that most people don't understand and/or would not take. You guys also set up your rigging system so that the hook can stay closed throughout the entire removal, but you don't mention or explain that.

Again, I think Mayer is topnotch and the technique that you use, as you use it, is safe. But you're ignoring a great deal of what is at stake and what has transpired within and between ANSI, OSHA, and the tree industry regarding using the crane as a tie-in point.
 
Mahk

I understand, I wasnt trying to argue with you. Sorry if that is the way I came off.



Here is a rundown of what we do, and how it works.

We use a 3/4" masterlink similiar to this one. http://tbn0.google.com/images?q=tbn:B67X3D-RrMtCKM:http://www.qinlongindustries.com/masterlinks.gif

We then put on one, or more slings, like the ones seen here.
http://www.wesspur.com/Slings/heavy-duty-rigging-slings.html

We use a hook just like the one pictured here.
http://static.howstuffworks.com/gif/hydraulic-crane-5.jpg

We then lock the crane hook shut with a locking pin, or other locking device.
http://images.orgill.com/200x200/6449060.jpg

The climber ties into the materlink and the hook is never opened again until there is NO load, or NO climber on the line.

We use a Screwpin shackle attached to each sling. We swing the sling around the piece at the appropriate spot, and install the screw shackle around the sling. To from a choker. The shackles we use are like the one below.
http://www.1st-chainsupply.com/images/Attachments/misc/shackleCM.jpg

I hope this clears up some of the questions.
 
Boston Bull,

I have climbed off of one of your cranes a few years back. Your system is better than what most do, but...you are still tying into the hook.

You can take the ball off of the line, put the Crosby link on the line, put the ball back on and climmb off of that.

The load line is the load line and the hook is the hook.

Can you make it to the May 23rd workshop up in Maine?

TMW
 
The nice thing about your setup BB is that it keeps the climbing line away from the ball, bolts, and extra cable. The link above the ball would cause the rope to run along the ball. You and I spoke about this the other day, but I wanted to let everyone else in on our talk.
 
[ QUOTE ]
The nice thing about your setup BB is that it keeps the climbing line away from the ball, bolts, and extra cable. The link above the ball would cause the rope to run along the ball. You and I spoke about this the other day, but I wanted to let everyone else in on our talk.

[/ QUOTE ]

I agree. I don't think anyone should use the system described above without a hook that is self closing and is designed to be locked. I personall like our setup best for the reasons you noted above and what we had spoken on.

I think using a non locking hook with a climber is like buying a chipper with no winch!.........
 
You must log in or register to reply here.

New threads New posts

Back
Top Bottom