Cab looks like it is in good shape

Post #264,074 by JayMehaffey 8/7/06 12:42:19 PM Reply	Cab looks like it is in good shape That theory makes sense, except the cabin is in far too good of a shape for it to have happened that way. If the cabin had hit the bridge, I think part of it would have been crushed. It could have happened that way though if the cabin had just grazed the edge and simply knocked the boom loose and caused it to bounce up. My guess would be that the bucket on the end of the arm was at the top initially. It hit the edge of the bridge and caught there, causing the rest of the arm to snap up. Jay
Post #264,082 by drewk 8/7/06 1:13:21 PM Reply	Think you're right about the bucket I was looking at the damage toe the left side of the bridge in the second picture. My thought was the cab took enough of a hit to tip the end of the boom up, which then tried to pole-vault down. But the bucket would survive that hit better and really whip the elbow of the boom up fast. === Purveyor of Doc Hope's [link\|http://DocHope.com\|fresh-baked dog biscuits and pet treats]. [link\|http://DocHope.com\|http://DocHope.com]
Post #264,083 by Andrew Grygus 8/7/06 1:21:00 PM Reply	I think I heard about this some time back. The way I heard it was the boom was originally parked but somehow raised during transportation - or maybe that was just the driver's excuse - I don't know. [link\|http://www.aaxnet.com\|AAx]
Post #264,090 by Another Scott 8/7/06 1:52:54 PM Reply	I think that would explain it. I think it happened like this: 1) Arm of the backhoe was up high enough to hit the bridge, but not high enough to hit the retaining guardrail, etc. (1st picture.) 2) The rebar, etc., caused the backhoe and truck to suddenly slow down, lifting the backhoe off the truck bed (and breaking the chains, etc., holding it down). Bucket of hoe hits underside of roadway. 3) A piece of the arm (maybe a hydraulic reservoir - it's hard do tell what it is) wedged itself against the retaining wall and that's what caused the arm to raise and the forward progress to stop (coupled with the energy loss in cutting through the rebar and concrete). (Blow up the 3rd picture.) Hydraulics don't usually act on their own, so how the arm ended up being too high in the first place is still a mystery. I'd have to suspect operator error. FWIW. Cheers, Scott.
Post #264,094 by drewk 8/7/06 2:01:06 PM Reply	Yup, even better So it was going right-to-left in the top picture. The boom was down, resting on or over the cab. The "elbow" hit the lowest vertical surface of the overpass straight on. The elbow went up. The front of the flatbed lifted up off the truck, and the top of the crane's cab slammed into the bottom of the left (in the picture) side of the bridge. === Purveyor of Doc Hope's [link\|http://DocHope.com\|fresh-baked dog biscuits and pet treats]. [link\|http://DocHope.com\|http://DocHope.com]
Post #264,104 by jake123 8/7/06 3:18:03 PM Reply	CSI: IWT --\n-------------------------------------------------------------------\n* Jack Troughton jake at consultron.ca \n [link\|http://consultron.ca\|http://consultron.ca] [link\|irc://irc.ecomstation.ca\|irc://irc.ecomstation.ca] \n Kingston Ontario Canada [link\|news://news.consultron.ca\|news://news.consultron.ca] *\n-------------------------------------------------------------------

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