[Burnaby] Gilmore Place | 214.8m | 64fl | Phase 1 Completed - Page 59

dgipson · #**1161** Posted **Sep 16, 2021, 1:11 AM**

After seeing some of those pictures, I'm going to skip riding the skytrain for the next 6mo. Just the slightest mistake might make it all crash down. Great pics though.

jollyburger · #**1162** Posted **Sep 16, 2021, 5:18 AM**

Quote:

Originally Posted by dgipson

After seeing some of those pictures, I'm going to skip riding the skytrain for the next 6mo. Just the slightest mistake might make it all crash down. Great pics though.

That makes sense.

Vin · #**1163** Posted **Sep 16, 2021, 9:28 PM**

Quote:

Originally Posted by dgipson

After seeing some of those pictures, I'm going to skip riding the skytrain for the next 6mo. Just the slightest mistake might make it all crash down. Great pics though.

Same thought flashed through my mind when I was riding the train couple of days ago going by the station. Feeling jittery all of a sudden!

It basically boils down to your trust of your fellow mankind (or lack of so to speak).

officedweller · #**1164** Posted **Sep 17, 2021, 4:55 AM**

Quote:

Originally Posted by Vin

It basically boils down to your trust of your fellow mankind (or lack of so to speak).

You mean those people called 'engineers'?
How about them bridges and tunnels?

FarmerHaight · #**1165** Posted **Sep 17, 2021, 6:05 AM**

Quote:

Originally Posted by officedweller

You mean those people called 'engineers'?
How about them bridges and tunnels?

I think they are more referring to an equipment operator making an error by hitting a support with a piece of machinery. Everything in engineering is all perfect calculations until human error gets involved!

I had similar thoughts, but if the risk of collapsing the Skytrain was anything more than negligible, they wouldn't be doing the excavation this way.

Metro-One · #**1166** Posted **Sep 17, 2021, 6:13 AM**

Yeah, human operational error also crossed my mind, though I am pretty sure worst case scenario would just be a shutdown of the line until the segment was corrected, not a full collapse.

SpongeG · #**1167** Posted **Sep 17, 2021, 6:45 AM**

I have faith in it being fine, but the way it looks does give me the uh no ways.

Marshal · #**1168** Posted **Sep 17, 2021, 7:23 AM**

The chance of an engineering error on something like this is incredibly slim: too many agencies involved, too many engineers, and too complete a process.

As for equipment operation, those supports are a lot larger/stronger than some of you are considering. Also, there is no equipment large enough, and no distance for a run up required to build enough momentum to be a threat. And the steel bracing is only there for lateral forces, of which there are only two: the force of the trains pushing outward as they take the bend; and the potential seismic load anticipated.

officedweller · #**1169** Posted **Sep 17, 2021, 4:38 PM**

Yeah, my 'engineer' comment was along the lines of - "will it keep standing during an earthquake?"
The same as when driving through the Massey Tunnel.

darylmartens · #**1170** Posted **Sep 24, 2021, 1:46 AM**

Coming out of the ground by Gilmore skytrain station.

idunno · #**1171** Posted **Sep 24, 2021, 4:03 PM**

I still can't get over the scale and irony of this parkade being built directly under a Skytrain guideway/station.

My only hope is that for many folks living in this complex, it would actually be quicker to take the elevator down to ground level and walk to the station than it would to go down to P8 and circle upwards for however long that takes.

Klazu · #**1172** Posted **Sep 24, 2021, 7:34 PM**

Such random collection of tower cranes on this site.

officedweller · #**1173** Posted **Sep 24, 2021, 9:27 PM**

Quote:

Originally Posted by Klazu

Such random collection of tower cranes on this site.

Italian colours?

DKaz · #**1174** Posted **Sep 24, 2021, 9:44 PM**

At least the ground forces aren't going to be on the parkade walls.

I'm more shocked that ground water isn't an issue. Plus the intersection of Gilmore and Lougheed Hwy is only 20m above sea level

Spr0ckets · #**1175** Posted **Sep 24, 2021, 10:26 PM**

Quote:

Originally Posted by officedweller

Italian colours?

....or Irish.

Vin · #**1176** Posted **Sep 27, 2021, 8:02 PM**

Quote:

Originally Posted by officedweller

You mean those people called 'engineers'?
How about them bridges and tunnels?

Well, people do make mistakes: even engineers and other professionals. You can see there are more instances of accidents or structural/equipment failure during construction more than post-con, especially when there are human errors.

Bridges and tunnels are built for longer terms with more factors of safety incorporated I would presume. Hence I feel safe crossing these.

Spr0ckets · #**1177** Posted **Sep 27, 2021, 9:11 PM**

Quote:

Originally Posted by Vin

Well, people do make mistakes: even engineers and other professionals. You can see there are more instances of accidents or structural/equipment failure during construction more than post-con, especially when there are human errors.

Bridges and tunnels are built for longer terms with more factors of safety incorporated I would presume. Hence I feel safe crossing these.

Just as a point of note.
They are using essentially the same technology, and certainly the same Physics and Engineering knowhow that they use to construct and build bridges, to brace the skytrain guideway over that construction site.

In fact you could consider the guideway to be as a sort of "bridge" over a land crevice or a canyon, and we've been doing that kind of construction (railway lines over canyons) for literally over 100 years going all the way back to steam-powered locomotives crossing the continent in more perilous terrain than this.

Not to presume to speak for the engineers, but this isn't (if you'll forgive the tortured metaphor), their first ride on the rodeo for this sort of situation as it's based on over century of knowledge and know-how.

And obviously the technology and tools they have at their disposal now is orders of magnitude far more superior.

I think the thing that unsettles people the most is the fact that the skytrain guideway was obviously built not just a long time ago (relatively speaking) but under different conditions for support and bracing underneath, - conditions that have now obviously changed by necessity of what's happening on the site below.

I believe they take all that into account.
(and maybe that's a large part of the reason why the switched to 2 car trains for that part of the route, in addition to the reduced load capacity of fewer commuters on that part of the line, you also have less weight and torque for the guideway to hold for each trip than the 5-6 car trains that traverse the southern part of the skytrain line, and farther East after the Production way station.)
And yes, you are correct. Human error does happen. We are a flawed species after all.
But believe it or not, human error is also often factored into a lot of our engineering too.

jollyburger · #**1178** Posted **Sep 27, 2021, 9:38 PM**

Quote:

Originally Posted by Spr0ckets

I believe they take all that into account.
(and maybe that's a large part of the reason why the switched to 2 car trains for that part of the route, in addition to the reduced load capacity of fewer commuters on that part of the line, you also have less weight and torque for the guideway to hold for each trip than the 5-6 car trains that traverse the southern part of the skytrain line, and farther East after the Production way station.)

I doubt with the passenger/car loads and speed of Skytrain that there is any significant difference for the loading on the guideway with 2 or 5 cars to cause a safety issue.

jollyburger · #**1179** Posted **Sep 27, 2021, 11:05 PM**

Allied Crane on their Instagram had the green tower crane install back on September 13. Said the 4th crane will go in with the next month.

Quote:

Saturdays project was erecting our brand new, 2021 J52 city crane for @onnigroup and @capwestbuild on their impressive #GilmorePlace project in Burnaby.

Our J52 comes equipped with a high-speed winch and ticked all the boxes from hook height required to capacity and Jib length. With jib increments of 2/3m it allowed CapWest to have their desired 32m reach.

Final tower height of 54m was chosen, 40m of which is the J52's standard 4ft x 4ft tower. Point to note, max freestand height on standard tower is 46m with it's full 52m jib. can be pumped up to 84.6m if required!

Crane 4 of 4 going up on this particular phase of the project within the next month. #JasoJ300.

https://www.instagram.com/p/CTxbH8FFghF/

Marshal · #**1180** Posted **Sep 27, 2021, 11:22 PM**

"Bridges and tunnels are built for longer terms with more factors of safety incorporated I would presume." You presume wrong Vin. Structural engineering does not involve any such judgments concerning factors of safety. The only mitigating factors relate to the type of structure and range of design loads. A concrete tower is engineered equal to a bridge, tunnel, or anything else concrete and reinforced.

"But believe it or not, human error is also often factored into a lot of our engineering too." This is correct. All engineering includes a safety factor (plus up to ~20%) for structural calculations.

". . . maybe that's a large part of the reason why the switched to 2 car trains for that part of the route." This is not the case. Translink runs 2 car trains for their own reasons. Translink would require that the line be properly supported for whatever loads Translink design policy requires. They wouldn't change their requirements for any private construction, even one they are partaking in. Besides, you could keep the loads within the structural parameters simply by slowing a 4-6 car train around the corner. (I worked with Translink on the 2 Busby stations: Gilmore & Brentwood).