joestevens29
Registered User
- Apr 30, 2009
- 54,136
- 17,250
They f***ed up so bad on 75st. They had to redesign shit because when the put up the piers to cross the road they realized that if they built across the way it was designed that it wouldn't work. I can't remember what they said was the issue in the news, but it never made it to the news that the original design was flawed.I just... that seems shocking to me. Particularly since it hasn't even been cold yet. Concrete shouldn't really have risks of cracking to high temperatures from thermal expansion, as the concrete expanding would put it in compression. Effect would be strengthening as it's basically free pre-tensioning.
Concrete is very strong in compression, if it's failing in August that suggests a severe design oversight that would be even more dangerous in the cold when you'd expect the concrete's thermal expansion to put it in tension where concrete is a weaker material.
And Edmonton's design ambient temperature is like 50degC per building code.... that's not even considering global warming effects where you'd expect 20 to 30 years from now that 50degC looks more like 60degC. I mean it was hot this year, but not like scorching record breaking hot.
Somebody f***ed up big time, may even go to jail. In the very least, I can't imagine they ever practice engineering in Alberta again.
So who the hell knows what they did back then and if the piers I heard about are the ones in question.
I question if the concrete used ended up being the right type and if it actually passed tests. There is a lot of shit that gets passed that should fail, but for some reason they do these whole wait and see scenarios. It might not end up being an issue, so lets maybe not look at it now is the motto. Or we know life expectancy is reduced so we will come up with a number that we will penalize you with. Only to find out the original guess on expectancy was wrong and the cost is greatly higher than what it should be.
Think we should be thankful they found this now and not after the warranty period when taxpayers would be screwed and have to foot another bill
Edit: I'd be curious what the penalties are for the delay on this project.
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