 Ontario's Nipigon River bridge fails, severing Trans-Canada HighwayMisc CDN | 207104 hits | Jan 10 6:20 pm | Posted by: N_Fiddledog  A newly constructed bridge in northern Ontario has heaved apart, closing the Trans-Canada highway � the only road connecting Eastern and Western Canada � indefinitely. At least one town has declared a state of emergency.Commentsview comments in forum You need to be a member of CKA and be logged into the site, to comment on news. |
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Heres hoping it is fixed by grad. Not a prob doing the US route up but getting her and all her stuff back through the states maybe a trick. Not to mention the extra miles. I guess I like her enough to get her a ticket to N Bay and a storage locker in T Bay till this is all sorted.
Not sure why a bridge would fail like this. But this is why we should always have a primary and a secondary highway.
There are a number of ways. If the metals weren't properly accounted for temperature variance - falling temps could have meant that the wires would shrink more than expected. The same with the supports in the ground - one side may be differing metals than the other and cold means one contracts faster than the other. The decking may also expand and contract at a different rate than the structure the decking is held up by.
That's why bridges usually have those interlocking metal forks called 'expansion joints' that let the bridge flex in different temperatures.
"As we turned [onto the highway], we saw the whole bridge � a kind of big gust of wind came underneath it and blew it up and then it came back down," she said, adding it shifted by about half a metre.
"We watched two pickup trucks come flying over. � They didn't see us, didn't hear my horn honking, and they flew over and smashed their front ends down on the cement."
http://www.cbc.ca/news/canada/manitoba/ ... -1.3397915
Wind has been responsible for many bridge failures through history. It's also why Engineers wear the "Iron Ring".
Not sure why a bridge would fail like this. But this is why we should always have a primary and a secondary highway.
There are a number of ways. If the metals weren't properly accounted for temperature variance - falling temps could have meant that the wires would shrink more than expected. The same with the supports in the ground - one side may be differing metals than the other and cold means one contracts faster than the other. The decking may also expand and contract at a different rate than the structure the decking is held up by.
That's why bridges usually have those interlocking metal forks called 'expansion joints' that let the bridge flex in different temperatures.
I always thought that engineers were hired to prevent this. Someone needs their licence reviewed!
Not sure why a bridge would fail like this. But this is why we should always have a primary and a secondary highway.
There are a number of ways. If the metals weren't properly accounted for temperature variance - falling temps could have meant that the wires would shrink more than expected. The same with the supports in the ground - one side may be differing metals than the other and cold means one contracts faster than the other. The decking may also expand and contract at a different rate than the structure the decking is held up by.
That's why bridges usually have those interlocking metal forks called 'expansion joints' that let the bridge flex in different temperatures.
I always thought that engineers were hired to prevent this. Someone needs their licence reviewed!
I recall back in the 80's that silicon valley had so much coke being snorted, that a number of newfangled 'anti lock' and 'fuel injection' systems for cars were leaving people without brakes and engine power suddenly because the silicon dies were cracking under heat stress. One of the fundamental things we calculate when designing the dies!
Not only does someone need their license reviewed, but so do the supervising engineers that signed off on it! Unless of course, we are seeing something no one could have anticipated or had seen before, like at Tachoma Narrows.
Reminds me of Los Angeles in the 1994 quake when so many new bridges that supposedly were the latest thing in seismic safety failed and so many of the old bridges withstood the quake simply because the engineers back on the old days built the ever-loving shit out of them.
So much for all those 'brilliant' and 'innovative' designs.
Reminds me of Los Angeles in the 1994 quake when so many new bridges that supposedly were the latest thing in seismic safety failed and so many of the old bridges withstood the quake simply because the engineers back on the old days built the ever-loving shit out of them.
And, they didn't purchase their steel from the lowest bidder, China.
The Canadian Ironworkers Union said Victoria officials could have saved time and money if they had opted to use domestic steel rather than steel produced overseas.
http://www.americanmanufacturing.org/bl ... ng-itself1
Simply a case of getting what you pay for.
Wonder how long it will take to figure out what happened and why. oh and if they will be sacrificing new engineers or if the people in charge will wear it
The lowest person that they can blame and still look like their doing something all the while keeping their jobs and protecting their political masters.
Wonder how long it will take to figure out what happened and why. oh and if they will be sacrificing new engineers or if the people in charge will wear it
The lowest person that they can blame and still look like their doing something all the while keeping their jobs and protecting their political masters.
Sadly I think your right.