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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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excavator through the bridge over the free way, what happened?
on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot |
#2
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excavator through the bridge over the free way, what happened?
From the looks of things, the cleanup cost $134,000, the offending span
was completely replaced at a cost of about half million. http://c141heaven.us/jokes/truck_bridge.html Scroll down to the bottom for a June news article. http://www.cjonline.com/stories/062406/kan_hays.shtml The Kansas DOT site has the worst search engine I've used in a while!! Stealth Pilot wrote: on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot |
#3
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Even father OT, consequences of causing damage to public stuff
A guy was pulling a car behind his RV some years ago. The brakes on the
car hung up and started spewing sparks, etc. The driver didn't notice. Sparks caused organic trash on the roadside to ignite, which in turn caused a forest fire. They located the guy and billed him something over $1 million for the firefight and restoration. He had to pay. He wrote this in to an RV magazine some years ago. He was sad. The thing,of course destroyed their retirement plans for the rest of their lives. Pete Stanaitis ----------------- Stealth Pilot wrote: on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot |
#4
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excavator through the bridge over the free way, what happened?
On 2008-03-22, RoyJ wrote:
From the looks of things, the cleanup cost $134,000, the offending span was completely replaced at a cost of about half million. http://c141heaven.us/jokes/truck_bridge.html Scroll down to the bottom for a June news article. It is amazing how little visible damage was sustained by the Huindai excavator. i http://www.cjonline.com/stories/062406/kan_hays.shtml The Kansas DOT site has the worst search engine I've used in a while!! Stealth Pilot wrote: on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot |
#5
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excavator through the bridge over the free way, what happened?
"Ignoramus21938" wrote in message
... It is amazing how little visible damage was sustained by the Huindai excavator. Visible being the key word. From the pics you does not look like it has any major damage, but I got to believe that excavator was twisted beyond repair! Greg |
#6
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excavator through the bridge over the free way, what happened?
Doesn't surprise me too much. The excavator arm was pointed forward,
caught the bridge beam, and then tilted up and back. The main forces on the excavator put the first arm into straight compression with all the resulting force into the base casting of the frame and then out to the tracks. No bending moments involved. The main cylinders would have been in tension, that will blow the seals and end caps out, again, no big damage. In one of the pictures in the middle of the sequence, you can see the right side main cylinder sticking straight up, no shaft sticking out. The left side cylinder is intact, must mean that the lower mount or eye is broken. Ignoramus21938 wrote: On 2008-03-22, RoyJ wrote: From the looks of things, the cleanup cost $134,000, the offending span was completely replaced at a cost of about half million. http://c141heaven.us/jokes/truck_bridge.html Scroll down to the bottom for a June news article. It is amazing how little visible damage was sustained by the Huindai excavator. |
#7
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excavator through the bridge over the free way, what happened?
On 2008-03-22, Greg O wrote:
"Ignoramus21938" wrote in message ... It is amazing how little visible damage was sustained by the Huindai excavator. Visible being the key word. From the pics you does not look like it has any major damage, but I got to believe that excavator was twisted beyond repair! I agree. I am sure that it is beyond repair. Probably will show up on eBay as "looks good, untested, sold as is". i |
#8
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excavator through the bridge over the free way, what happened?
On Sat, 22 Mar 2008 13:01:58 -0500, RoyJ wrote:
Doesn't surprise me too much. The excavator arm was pointed forward, caught the bridge beam, and then tilted up and back. The main forces on the excavator put the first arm into straight compression with all the resulting force into the base casting of the frame and then out to the tracks. No bending moments involved. The main cylinders would have been in tension, that will blow the seals and end caps out, again, no big damage. In one of the pictures in the middle of the sequence, you can see the right side main cylinder sticking straight up, no shaft sticking out. The left side cylinder is intact, must mean that the lower mount or eye is broken. Ignoramus21938 wrote: On 2008-03-22, RoyJ wrote: From the looks of things, the cleanup cost $134,000, the offending span was completely replaced at a cost of about half million. http://c141heaven.us/jokes/truck_bridge.html Scroll down to the bottom for a June news article. It is amazing how little visible damage was sustained by the Huindai excavator. There's probably some severely damaged pivots and bearings, and possibly stripped gears, however. I wouldn't be surprised if the chassis wasn't all bent down in the middle, too. That sucker had to have hit hard. -- Tim Wescott Control systems and communications consulting http://www.wescottdesign.com Need to learn how to apply control theory in your embedded system? "Applied Control Theory for Embedded Systems" by Tim Wescott Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html |
#9
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excavator through the bridge over the free way, what happened?
"Ignoramus21938" wrote in message
... On 2008-03-22, Greg O wrote: "Ignoramus21938" wrote in message ... It is amazing how little visible damage was sustained by the Huindai excavator. Visible being the key word. From the pics you does not look like it has any major damage, but I got to believe that excavator was twisted beyond repair! I agree. I am sure that it is beyond repair. Probably will show up on eBay as "looks good, untested, sold as is". i Be careful so you don't bid on it!! It is probably like some other auction stuff you drag home! Greg |
#10
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excavator through the bridge over the free way, what happened?
Greg O wrote: "Ignoramus21938" wrote in message ... On 2008-03-22, Greg O wrote: "Ignoramus21938" wrote in message ... It is amazing how little visible damage was sustained by the Huindai excavator. Visible being the key word. From the pics you does not look like it has any major damage, but I got to believe that excavator was twisted beyond repair! I agree. I am sure that it is beyond repair. Probably will show up on eBay as "looks good, untested, sold as is". i Be careful so you don't bid on it!! It is probably like some other auction stuff you drag home! Greg I'd take it. The boom might be wrecked, but I expect the entire base was just fine and would make quite an ATV... |
#11
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excavator through the bridge over the free way, what happened?
Stealth Pilot wrote:
on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) That was the one at Hays, Kansas, I remember that detail because my wife has family there. Somebody's insurance is going to pay a big bill on that one. I was quite confident from the pics that there was no way to repair that bridge, too much damage to the concrete and rebar. Seems that was quite right. Jon |
#12
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excavator through the bridge over the free way, what happened?
On Sun, 23 Mar 2008 03:54:51 -0700 (PDT), "
wrote: On Mar 22, 2:52 am, Stealth Pilot wrote: on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot That also happened here in Hawaii. Damaged a pedestrian bridge. It was replaced. Karl Had one here last fall where one pre-stressed beam out of eight was damaged, one lane of the overpass (four lanes over four lanes) has been closed all winter. It will be interesting to see how they go about replacing an interior beam. Gerry :-)} London, Canada |
#13
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excavator through the bridge over the free way, what happened?
On Sun, 23 Mar 2008 22:06:51 -0400, Gerald Miller
wrote: On Sun, 23 Mar 2008 03:54:51 -0700 (PDT), " wrote: On Mar 22, 2:52 am, Stealth Pilot wrote: on the 14 feb 2006 someone posted shots of a tracked excavator sitting atop a low loader zipping along at freeway speeds that had the arm come up and spear through an overhead concrete road bridge. (it really was that long ago) does anyone know what eventuated out of the accident? was the bridge repaired in situ or was the span demolished and replaced? what happened to the company that owned the excavator? these photos resurfaced in an email recently and it piqued my interest. I've always wondered what the consequential happenings were regarding that accident. thanks Stealth Pilot That also happened here in Hawaii. Damaged a pedestrian bridge. It was replaced. Karl Had one here last fall where one pre-stressed beam out of eight was damaged, one lane of the overpass (four lanes over four lanes) has been closed all winter. It will be interesting to see how they go about replacing an interior beam. Gerry :-)} London, Canada it struck me as a fair bugger of a job. over here in australia the bridges are usually cast on the approaches of the unfinished road then slid into position on the supports then the road surface and the road is completed. I suppose you'd need the precise dimensions. set up the form work and prestressed reo make the span then low loader it across one of the existing spans then heavy lift crane it into position. then rebuild the road surface. the question in the photo shoot was how much energy was expended. the answer is half the mass of the tracked excavator and trailer in lbs times the velocity in ft per second squared. it is the kinetic energy absorbed bringing the traffic to a halt. actually seems to be an easy question to answer on reflection. thanks for the updates btw. Stealth Pilot |
#14
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excavator through the bridge over the free way, what happened?
On Mon, 24 Mar 2008 22:26:17 +0900, Stealth Pilot
wrote: the question in the photo shoot was how much energy was expended. the answer is half the mass of the tracked excavator and trailer in lbs times the velocity in ft per second squared. it is the kinetic energy absorbed bringing the traffic to a halt. actually seems to be an easy question to answer on reflection. You need to divide your result by 32.2 ft/sec^2 (gravity). Dontcha love the FPS system? -- Ned Simmons |
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