Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
Just saw this, at least 6 killed.
You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout |
#2
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote:
Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster |
#3
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 4:42 PM, Uncle Monster wrote:
On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. |
#4
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Thu, 15 Mar 2018 16:39:22 -0400, Ed Pawlowski wrote:
Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout One report states the bridge was built offsite and moved into position. Somebody screwed the pooch when erecting it. |
#5
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Thursday, March 15, 2018 at 5:37:49 PM UTC-5, Frank wrote:
On 3/15/2018 4:42 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. There was some major incompetence involved. It will be interesting to see what the investigation turns up. o_O [8~{} Uncle Curious Monster |
#6
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Thu, 15 Mar 2018 16:14:24 -0700, Oren wrote:
On Thu, 15 Mar 2018 16:39:22 -0400, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout One report states the bridge was built offsite and moved into position. Somebody screwed the pooch when erecting it. It was far from finished - completion was scrduled for late 2019?? It was still under construction when it fell. |
#7
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 3:37 PM, Frank wrote:
On 3/15/2018 4:42 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered.Â* It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. Are all gun nuts this stupid? |
#8
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 7:15 PM, Uncle Monster wrote:
On Thursday, March 15, 2018 at 5:37:49 PM UTC-5, Frank wrote: On 3/15/2018 4:42 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. There was some major incompetence involved. It will be interesting to see what the investigation turns up. o_O [8~{} Uncle Curious Monster Are the libtards blaming President Trump yet? |
#9
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 6:46 PM, Clare Snyder wrote:
.... It was still under construction when it fell. The news story I saw said it had been opened for pedestrian traffic for under six hours... -- |
#10
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Thursday, March 15, 2018 at 7:58:09 PM UTC-5, Dev Null wrote:
On 3/15/2018 7:15 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 5:37:49 PM UTC-5, Frank wrote: On 3/15/2018 4:42 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. There was some major incompetence involved. It will be interesting to see what the investigation turns up. o_O [8~{} Uncle Curious Monster Are the libtards blaming President Trump yet? Bodyless, Traitor_4ever and Dove Anus will. ^_^ [8~{} Uncle Observant Monster |
#11
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 03/15/2018 05:14 PM, Oren wrote:
On Thu, 15 Mar 2018 16:39:22 -0400, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout One report states the bridge was built offsite and moved into position. Somebody screwed the pooch when erecting it. The report I read said it was a technique developed at FIU. They showed us freshmen engineering students a video of the Tacoma Narrows bridge collapse to show us how not to do things. The FIU student will have a close up and personal example to draw on. That's what happens when your engineers spent their childhood building bridges from Legos. |
#12
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 10:55 PM, rbowman wrote:
On 03/15/2018 05:14 PM, Oren wrote: On Thu, 15 Mar 2018 16:39:22 -0400, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered.* It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout One report states the bridge was built offsite and moved into position. Somebody screwed the pooch when erecting it. The report I read said it was a technique developed at FIU. They showed us freshmen engineering students a video of the Tacoma Narrows bridge collapse to show us how not to do things. The FIU student will have a close up and personal example to draw on. That's what happens when your engineers spent their childhood building bridges from Legos. It was also stated it was not complete yet. So what? It should have been properly secured and supported along the way. Poor engineering. |
#13
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/16/2018 9:05 AM, Ed Pawlowski wrote:
.... It was also stated it was not complete yet.* So what?* It should have been properly secured and supported along the way.* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate. Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it? Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- |
#14
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/16/2018 10:40 AM, dpb wrote:
On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.* So what?* It should have been properly secured and supported along the way.* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate.* Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. Engineering is not just the design of the finished unit, it also includes proper procedure for construction and installation. Unless a couple of pages of the assembly instructions were missing, it is still a design flaw. USA Today article states experts say it was vulnerable to collapse until completed. While that may be true, it does not sound very smart over a highway. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it?* Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- Not complete. Scheduled to be complete in 2019. It was just erected in 6 hours last Saturday. The concepts of fabricating off site is a good one that has worked for many projects but evidently, it was poorly executed here. |
#15
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Fri, 16 Mar 2018 10:59:24 -0400, Ed Pawlowski wrote:
On 3/16/2018 10:40 AM, dpb wrote: On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.* So what?* It should have been properly secured and supported along the way.* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate.* Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. Engineering is not just the design of the finished unit, it also includes proper procedure for construction and installation. Unless a couple of pages of the assembly instructions were missing, it is still a design flaw. USA Today article states experts say it was vulnerable to collapse until completed. While that may be true, it does not sound very smart over a highway. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it?* Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- Not complete. Scheduled to be complete in 2019. It was just erected in 6 hours last Saturday. The concepts of fabricating off site is a good one that has worked for many projects but evidently, it was poorly executed here. _Companies behind Florida bridge collapse have history of fines, failures, lawsuits_ http://www.foxnews.com/us/2018/03/16/companies-behind-florida-bridge-collapse-have-history-fines-failures-lawsuits.html "The two firms responsible for building Florida International University’s "instant bridge," which suddenly collapsed Thursday and left six people dead, are coming under increased scrutiny as details emerge of past engineering failures and inspection fines -- including a recent accusation that one hired “unskilled” and “careless” workers." |
#16
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 03/16/2018 11:54 AM, Wayne Boatwright wrote:
On Fri 16 Mar 2018 07:59:24a, Ed Pawlowski told us... On 3/16/2018 10:40 AM, dpb wrote: On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.Â* So what?Â* It should have been properly secured and supported along the way.Â* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate.Â* Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. Engineering is not just the design of the finished unit, it also includes proper procedure for construction and installation. Unless a couple of pages of the assembly instructions were missing, it is still a design flaw. USA Today article states experts say it was vulnerable to collapse until completed. While that may be true, it does not sound very smart over a highway. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it?Â* Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- Not complete. Scheduled to be complete in 2019. It was just erected in 6 hours last Saturday. The concepts of fabricating off site is a good one that has worked for many projects but evidently, it was poorly executed here. We have numerous pedestrian walkways spanning over large freeways here in the Phoenix area. To my knowledge there has never been a failure. My guess is that there is a strong push in the engineering world to make stuff faster and cheaper.Â* Apparently they went a bit too far. |
#17
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 03/16/2018 10:54 AM, James Wilkinson Sword wrote:
Maybe if America spent more on engineers and less on lawyers you could achieve buildings that stay up. Sadly, it's the fear of litigation that keeps engineers somewhat honest. |
#18
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/16/2018 1:06 PM, Sue Yerasses wrote:
On 03/16/2018 10:54 AM, James Wilkinson Sword wrote: Maybe if America spent more on engineers and less on lawyers you could achieve buildings that stay up. Sadly, it's the fear of litigation that keeps engineers somewhat honest. I'm not so sure about our current crop of engineers. I had a retired classmate retire as a civil engineer and teach part time in a community college. They would not let him flunk anybody and he quit. Another friend was a state highway department engineer who retired but was retained as a consultant. It appears younger engineers were not cutting it. A lot of politicization appears to be involved even in engineering not to mention science. |
#19
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Friday, March 16, 2018 at 1:02:32 PM UTC-5, Frank wrote:
On 3/16/2018 1:06 PM, Sue Yerasses wrote: On 03/16/2018 10:54 AM, James Wilkinson Sword wrote: Maybe if America spent more on engineers and less on lawyers you could achieve buildings that stay up. Sadly, it's the fear of litigation that keeps engineers somewhat honest. I'm not so sure about our current crop of engineers. I had a retired classmate retire as a civil engineer and teach part time in a community college. They would not let him flunk anybody and he quit. Another friend was a state highway department engineer who retired but was retained as a consultant. It appears younger engineers were not cutting it. A lot of politicization appears to be involved even in engineering not to mention science. Politically Correct engineers? Sounds like a recipe for disaster. o_O [8~{} Uncle Science Monster |
#20
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/2018 8:43 PM, Bob F wrote:
On 3/15/2018 3:37 PM, Frank wrote: On 3/15/2018 4:42 PM, Uncle Monster wrote: On Thursday, March 15, 2018 at 3:39:27 PM UTC-5, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered.Â* It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout The news of the tragedy is all over talk radio here. Very sad. 8-( [8~{} Uncle Sad Monster There will be student marches throughout the nation against bridges. Are all gun nuts this stupid? I'm just pulling chain of likes of you. I read they suspended a student in Ohio for refusing to go to a gun protest. Its you new Nazis. |
#22
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Friday, March 16, 2018 at 10:59:30 AM UTC-4, Ed Pawlowski wrote:
On 3/16/2018 10:40 AM, dpb wrote: On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.Â* So what?Â* It should have been properly secured and supported along the way.Â* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate.Â* Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. Engineering is not just the design of the finished unit, it also includes proper procedure for construction and installation. Unless a couple of pages of the assembly instructions were missing, it is still a design flaw. That's not true. A design flaw is something that was wrong in the design, the drawings, the specifications that showed how it was to be built. I could provide perfectly a perfectly sound desing for anything, give it to the customer and they could then hire a contractor that screws it all up. Or that deliberately skipped steps to save money. Usually in a project like this the company that designed it would also be involved in monitoring the construction, but until there is an investigation, there is no way to place the blame. USA Today article states experts say it was vulnerable to collapse until completed. While that may be true, it does not sound very smart over a highway. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it?Â* Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- Not complete. Scheduled to be complete in 2019. It was just erected in 6 hours last Saturday. That doesn't sound right either. It was a concrete structure that they first built on the side, then later moved over the highway. You don't do that in 6 hours. The concepts of fabricating off site is a good one that has worked for many projects but evidently, it was poorly executed here. From what I saw it was being fabricated at the site, just not in it's final position. |
#23
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On Fri, 16 Mar 2018 09:40:16 -0500, dpb wrote:
On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.* So what?* It should have been properly secured and supported along the way.* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate. Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it? Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. It was not open to pedestrian traffic from what was reported this morning. It was not due to be opened until sometime mid-2019. It had been raised into place within the last 6 days or so after having been assembled alongside the highway. My bet is on the contractor taking a shortcut not authorized by the engineers - similar to what happened with a previous bridge failure in Voirginia with the same contractor - and a "temporary bridge" at a construction site which failed causing the death of at least one worker. This contractor should not be building bridges!!! |
#24
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
Oren posted for all of us...
On Fri, 16 Mar 2018 10:59:24 -0400, Ed Pawlowski wrote: On 3/16/2018 10:40 AM, dpb wrote: On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet.* So what?* It should have been properly secured and supported along the way.* Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate.* Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. Engineering is not just the design of the finished unit, it also includes proper procedure for construction and installation. Unless a couple of pages of the assembly instructions were missing, it is still a design flaw. USA Today article states experts say it was vulnerable to collapse until completed. While that may be true, it does not sound very smart over a highway. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it?* Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. -- Not complete. Scheduled to be complete in 2019. It was just erected in 6 hours last Saturday. The concepts of fabricating off site is a good one that has worked for many projects but evidently, it was poorly executed here. _Companies behind Florida bridge collapse have history of fines, failures, lawsuits_ http://www.foxnews.com/us/2018/03/16/companies-behind-florida-bridge-collapse-have-history-fines-failures-lawsuits.html "The two firms responsible for building Florida International University?s "instant bridge," which suddenly collapsed Thursday and left six people dead, are coming under increased scrutiny as details emerge of past engineering failures and inspection fines -- including a recent accusation that one hired ?unskilled? and ?careless? workers." My analysis of what I have seen on the news: This appeared to be built alongside the highway and swung over the highway on a pivot and placed on the saddles. It also appeared to me to be a post tensioned structure and from the reports a snap or boom was heard just before collapse. If they were in the process of doing this then nobody should have been under that structure at that time. Nobody should have been on the structure. Let them investigate and the lawsuits will be filed. I feel glad that the first responders were not harmed as it is extremely unstable at this point. My condolences to the victims and relatives. The PA Turnpike is replacing many bridges and the turnpike is shut down during the lift and placement for this very reason. -- Tekkie |
#25
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/16/2018 2:02 PM, Frank wrote:
On 3/16/2018 1:06 PM, Sue Yerasses wrote: On 03/16/2018 10:54 AM, James Wilkinson Sword wrote: Maybe if America spent more on engineers and less on lawyers you could achieve buildings that stay up. Sadly, it's the fear of litigation that keeps engineers somewhat honest. I'm not so sure about our current crop of engineers.* I had a retired classmate retire as a civil engineer and teach part time in a community college.* They would not let him flunk anybody and he quit.* Another friend was a state highway department engineer who retired but was retained as a consultant.* It appears younger engineers were not cutting it.* A lot of politicization appears to be involved even in engineering not to mention science. Yah, you're right. If the bridge collapsed under it's own weight it never would have stood up to a few hundred students having a party on the thing. |
#26
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 03/16/2018 08:05 AM, Ed Pawlowski wrote:
On 3/15/2018 10:55 PM, rbowman wrote: On 03/15/2018 05:14 PM, Oren wrote: On Thu, 15 Mar 2018 16:39:22 -0400, Ed Pawlowski wrote: Just saw this, at least 6 killed. You have to wonder how it was engineered. It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout One report states the bridge was built offsite and moved into position. Somebody screwed the pooch when erecting it. The report I read said it was a technique developed at FIU. They showed us freshmen engineering students a video of the Tacoma Narrows bridge collapse to show us how not to do things. The FIU student will have a close up and personal example to draw on. That's what happens when your engineers spent their childhood building bridges from Legos. It was also stated it was not complete yet. So what? It should have been properly secured and supported along the way. Poor engineering. FIGG is building one in East Chicago too. I'd stay out of that area. I'm not sure it's FIGG's problem though. Munilla Construction has a record of fails but they're also heavily connected to the Cubans running south Florida including Gimenez. |
#27
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 03/16/2018 02:04 PM, Clare Snyder wrote:
On Fri, 16 Mar 2018 09:40:16 -0500, dpb wrote: On 3/16/2018 9:05 AM, Ed Pawlowski wrote: ... It was also stated it was not complete yet. So what? It should have been properly secured and supported along the way. Poor engineering. Not necessarily the engineering if it was, indeed, construction; the design may have been perfectly adequate. Where, precisely, the blame belongs is at this point indeterminate and jumping to any conclusions premature. I've even heard both reported that it had been opened for pedestrian traffic which would imply completion and that it was still incomplete--so which was it? Clearly the newsfolk don't have all their "facts" straight yet (as if they ever do) before rush to pontificate. It was not open to pedestrian traffic from what was reported this morning. It was not due to be opened until sometime mid-2019. It had been raised into place within the last 6 days or so after having been assembled alongside the highway. My bet is on the contractor taking a shortcut not authorized by the engineers - similar to what happened with a previous bridge failure in Voirginia with the same contractor - and a "temporary bridge" at a construction site which failed causing the death of at least one worker. This contractor should not be building bridges!!! The Munilla brothers have deep pockets when it comes to financing the local politicians. Of course they're going to get the contract whether they can perform or not. |
#28
Posted to alt.home.repair
|
|||
|
|||
Pedestrian bridge collapse
On 3/15/18 3:39 PM, Ed Pawlowski wrote:
Just saw this, at least 6 killed. You have to wonder how it was engineered.Â* It was installed in six hours! https://www.msn.com/en-us/news/us/si...id=mailsignout An engineer spotted a crack in it a couple days before the collapse. https://www.abcactionnews.com/news/state/fdot-warned-about-fiu-bridge-cracking-2-days-before-fatal-collapse-but-didnt-hear-voicemail |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
3 in custody in connection with I-85 fire, bridge collapse | Home Repair | |||
Bridge collapse | UK diy | |||
Design flaw cited in MN bridge collapse | Metalworking | |||
Don -- Minneapolis road bridge collapse | Metalworking |