Brookfield Place Calgary | 247M - 56F | Construction

[Tarsus]

Originally Posted by patm

Same people who probably installed the fixtures in my condo.

Canadian craftsmanship tho

Stupid post. I'm not saying someone isn't to blame for this, but to simply lay blame at 'Canadian craftsmanship' is stupid and ignorant. This kind of thing happens everywhere, and in fact is even worse.

[240glt]

^^ As an HVAC specialist I find that hard to believe. Typically positive pressure inside a building is only +/- 10 to 15 pascals. Barely a fart. Even if something went wacko with the controls and it threw all fans to 100% and closed all the return/ exhaust dampers it wouldn't even come close to being enough pressure to blow out a vision unit. Blow up ductwork sure, but not the curtainwall

Another thing that's funny is that the window completely blew out. I've seen plenty of vision units fail over the years, and even shatter, but they're all tempered and will normally stay in place. Something different must've happened to have it blow out like that

Has it only been on the curved panes ? I'd be looking for a defect in the glass if that's the case

[craner]

Originally Posted by patm

Same people who probably installed the fixtures in my condo.

Canadian craftsmanship tho

Cue suburbia's "construction mafia" etc. tirade ...

[Corndogger]

Originally Posted by craner

Cue suburbia's "construction mafia" etc. tirade ...

He's been very quiet since the election. Is he now part of Nenshi's city hall entourage?

[Corndogger]

Originally Posted by 240glt

^^ As an HVAC specialist I find that hard to believe. Typically positive pressure inside a building is only +/- 10 to 15 pascals. Barely a fart. Even if something went wacko with the controls and it threw all fans to 100% and closed all the return/ exhaust dampers it wouldn't even come close to being enough pressure to blow out a vision unit. Blow up ductwork sure, but not the curtainwall

Another thing that's funny is that the window completely blew out. I've seen plenty of vision units fail over the years, and even shatter, but they're all tempered and will normally stay in place. Something different must've happened to have it blow out like that

Has it only been on the curved panes ? I'd be looking for a defect in the glass if that's the case

When these panes are manufactured are they stamped with the date, plant number/location, etc.? A building this big probably has glass panes coming from several batches if not also different plants. How many panes would have to fail before they could declare there was a manufacturing glitch/screw up?

[Calgarian]

Originally Posted by 240glt

^^ As an HVAC specialist I find that hard to believe. Typically positive pressure inside a building is only +/- 10 to 15 pascals. Barely a fart. Even if something went wacko with the controls and it threw all fans to 100% and closed all the return/ exhaust dampers it wouldn't even come close to being enough pressure to blow out a vision unit. Blow up ductwork sure, but not the curtainwall

Another thing that's funny is that the window completely blew out. I've seen plenty of vision units fail over the years, and even shatter, but they're all tempered and will normally stay in place. Something different must've happened to have it blow out like that

Has it only been on the curved panes ? I'd be looking for a defect in the glass if that's the case

A defect in the glass is almost certainly the cause, the pressure differential is what some people are speculating caused the defect to actually break. The other pane that was broken by the swing stage was also curved, and I've seen a couple cracks in the curved glass on the roof of the atrium portion. Sounds like the curved glass was not well manufactured. Somebody is going to be facing a massive lawsuit, and if it's the glass manufacturer, then this could bury them.

[patm]

lol relax it was a joke.

But new home construction in this city is awful and you're burying your head in the sand if you don't think it true. Can't speak about commercial construction although our new office has had plenty of issues too.

[240glt]

Originally Posted by Calgarian

A defect in the glass is almost certainly the cause, the pressure differential is what some people are speculating caused the defect to actually break. The other pane that was broken by the swing stage was also curved, and I've seen a couple cracks in the curved glass on the roof of the atrium portion. Sounds like the curved glass was not well manufactured. Somebody is going to be facing a massive lawsuit, and if it's the glass manufacturer, then this could bury them.

Could be a manufacturer problem no doubt, could also be in installation issue. Obviously if they only lost one pane it's a little early to panic but I bet they have brought in the manufacturer's rep to review the glazing and install thoroughly. Last thing you want your building to have a reputation for is as the building that periodically rains broken glass down on the sidewalk!

[jc_yyc_ca]

Originally Posted by Corndogger

He's been very quiet since the election. Is he now part of Nenshi's city hall entourage?

His bum buddy is elected, so now he can relax lol.

[Corndogger]

Repeat sidewalk and lane closure near Brookfield Place spurred by three scratched windows

Marco Civitarese, chief building official at the city, said Wednesday afternoon it’s not known how long this closure will last.

“We’re following weather patterns right now. It could be within a day, it could be within a week,” he said.

Civitarese said Tuesday night’s closures of sidewalks and a single left-hand lane on 6th Ave. S.W from 1st St. to 2nd St. occurred after Brookfield found three “minor scratches” on three different window panels immediately below the building’s 51st floor while further inspecting the building after Sunday’s incident.

“This is a precautionary measure on all fronts. It’s not because of any other implications of breaking glass,” he said.

Full article at: http://calgaryherald.com/news/local-...atched-windows

[Calgarian]

Originally Posted by 240glt

Could be a manufacturer problem no doubt, could also be in installation issue. Obviously if they only lost one pane it's a little early to panic but I bet they have brought in the manufacturer's rep to review the glazing and install thoroughly. Last thing you want your building to have a reputation for is as the building that periodically rains broken glass down on the sidewalk!

Oh totally, until they finish investigating we won't know for sure. Good thing this building is still empty, tenants would be extremely upset if they couldn't access their building or have workers doing major repairs immediately after moving in lol.

[SteveP]

Originally Posted by patm

lol relax it was a joke.

But new home construction in this city is awful and you're burying your head in the sand if you don't think it true. Can't speak about commercial construction although our new office has had plenty of issues too.

Considering your posts in the municipal election thread it's hard to tell if you're joking or not.

[suburbia]

Originally Posted by jc_yyc_ca

His bum buddy is elected, so now he can relax lol.

Jason Kenny is actually someone else's bum buddy, and technically he is not elected yet.

While I've been happy to see more construction focused discussion, a pinch dismayed (though somewhat flattered) that half of your conversation continues to be about your infatuation with me. Shall I mail you a signed photograph?

[rotten42]

.....

[Bokimon]

http://www.cbc.ca/news/canada/calgar...pers-1.4297327

Interesting read and discussion from the cbc about the project though I believe the expert's claim of exponential windspeed increase at 850' up is a bit exaggerated though. Double however is possible but we are talking 30-60km/hr type of deal.
Thoughts on this?
I too believe there must of been some kind of technical fault within the glass itself, specifically the outer glass panel or layer of the double glazed units. You can see the untinted inside glazing is still intact. Add to the misery, this being at a curved corner condition that high up must of created some kind of anomaly with the exterior pressures and loads from the wind, temp, etc to cause it to break. There are other wide swaths of curved glass all over this thing so I hope this is investigated well and work with the supplier to find a solution.

[CrossedTheTracks]

Originally Posted by Bokimon

http://www.cbc.ca/news/canada/calgar...pers-1.4297327

Interesting read and discussion from the cbc about the project though I believe the expert's claim of exponential windspeed increase at 850' up is a bit exaggerated though. Double however is possible but we are talking 30-60km/hr type of deal.

Caveat: I'm not familiar with the physics of this, I'm just a math guy

Logarithmic would be more accurate than calling it exponential. The rule of thumb (see https://en.wikipedia.org/wiki/Wind_profile_power_law) shows a typical exponent of 0.143. That seems to be an empirically-derived value rather than any kind of hard rule. Not sure if anything can drive it higher than 1.0.

Whether "doubling can happen" is independent of the close-to-surface speed, according to the equations there. But I assume the topic is quite complicated, with vast differences between "what can be expected to happen 99% of the time under typical conditions" vs. "what is possible in the remaining 1%".

[topdog]

Originally Posted by suburbia

Jason Kenny is actually someone else's bum buddy, and technically he is not elected yet.

While I've been happy to see more construction focused discussion, a pinch dismayed (though somewhat flattered) that half of your conversation continues to be about your infatuation with me. Shall I mail you a signed photograph?

So just like President Trump, you're one of those people happy to get publicity even if it's negative publicity.

[Calgarian]

Originally Posted by Bokimon

http://www.cbc.ca/news/canada/calgar...pers-1.4297327

Interesting read and discussion from the cbc about the project though I believe the expert's claim of exponential windspeed increase at 850' up is a bit exaggerated though. Double however is possible but we are talking 30-60km/hr type of deal.
Thoughts on this?
I too believe there must of been some kind of technical fault within the glass itself, specifically the outer glass panel or layer of the double glazed units. You can see the untinted inside glazing is still intact. Add to the misery, this being at a curved corner condition that high up must of created some kind of anomaly with the exterior pressures and loads from the wind, temp, etc to cause it to break. There are other wide swaths of curved glass all over this thing so I hope this is investigated well and work with the supplier to find a solution.

Looks like the edges of the pane in question are still in place, so that whole discussion is irrelevant. If the structural silicone failed, then he would have a point, but the pic I saw showed it still in place.

[Coldrsx]

Stunning in person, bravo!


www.twitter.com/ianoyeg

[Design-mind]

Originally Posted by Bokimon

http://www.cbc.ca/news/canada/calgar...pers-1.4297327

Interesting read and discussion from the cbc about the project though I believe the expert's claim of exponential windspeed increase at 850' up is a bit exaggerated though. Double however is possible but we are talking 30-60km/hr type of deal.
Thoughts on this?
I too believe there must of been some kind of technical fault within the glass itself, specifically the outer glass panel or layer of the double glazed units. You can see the untinted inside glazing is still intact. Add to the misery, this being at a curved corner condition that high up must of created some kind of anomaly with the exterior pressures and loads from the wind, temp, etc to cause it to break. There are other wide swaths of curved glass all over this thing so I hope this is investigated well and work with the supplier to find a solution.

I am not sure what caused the Brookfield glass to break but I have seen harmonic vibration when amplified by certain wind speeds rip cladding off buildings. Glass is even more delicate on a curtain wall because you have a differing pressure on the inside.