crown reduction on large Pin Oak

[Courierguy]

Correct, that is the usual anti-2 block set-up, and I couldn't see one on his. He was no doubt winching down while extending the boom to keep you stationary relative to the boom tip.
Becket/wedge socket.....yeah thats I was was referring to and couldn't think of....anyway, its hard to tell from the picture if he simply had the cable clamping the dead end of the cable right up again the wedge socket with very little dead end cable showing or what, something looks off. Every other crane I've seen always has a a few inches between the becket and the dead end clamp. It would appear he is thinking the purpose of the clamp is to secure the live end and maybe thinks cinching it up tight to the becket would do that better, and that is incorrect. The becket is supposed to take the load. That coupled with the apparent lack of an anti 2-block is a major heads up, and I'd jump his sh*t about it, politely inquire, I meant to say.
Point being it would appear that he has ALREADY 2 blocked it....and thats why the clamp is so far down the line, up tight against the becket!

 

[willbranch]

I sifted back through all of the photos of that job and found that there was cable after the clamp(there's about three inches hiding in the clevises) but the cable clamp was resting very close to the top of the becket. I was unaware of any hazards when I tied in,and appreciate the heads up. I will keep my eyes open for problems like that in the future. Thanks.

 

[classictruckman]

Some newer wedges have a notch out of them to hold the clamp close to the socket on the dead end, not the live end.

Note You must have an operating Anti-2-Block device on any crane which is lifting personel.

 

[willbranch]

[ QUOTE ]


Note You must have an operating Anti-2-Block device on any crane which is lifting personel.

[/ QUOTE ]

That was just the info I was looking for. Where is it written? ANSI?

 

[allmark]

Ansi Z133.1-2006 5.75
"Cranes with telescoping booms shall be equiped with an anti-two block device."

 

[Mark Chisholm]

[ QUOTE ]
Ansi Z133.1-2006 5.75
"Cranes with telescoping booms shall be equiped with an anti-two block device."

[/ QUOTE ]

We need to revise that. Maybe "cranes with telescoping booms and load lines...". Otherwise it sounds like a knuckle boom needs ATB systems too.

 

[brushbandit]

Also it should be noted that the A2B wire that comes off the reel and goes to the A2B switch at the boom is also used to tell the LMI system how far the boom is out. No A2B system or a broken A2B wire often means the load computer is also not functioning.