[mburrrrr]

Site plan approval drawing

 

[FastidiousHack]

Speaking of GFRP... Is fiberglass-polymer rebar ever used in Toronto for skyscraper construction? I don't seem to remember seeing anything other than good ol' rusted steel rebar at the construction sites. Is it cost-prohibitive to put into building construction? Does it require special skilled labor to install? (i.e. you can't just weld the damn thing)

It's being used more often recently, there are some examples in North York. It's advantages are more pronounced in transportation infrastructure. As for why, mostly just cost.

Due to the relatively low fundamental frequency of tall buildings, skyscrapers typically perform very well in earthquakes so I think we can likely eliminate that risk.

I generally agree, wind will dominate lateral load cases, however that doesn't mean tall buildings are immune from damage due to earthquakes.

A ~300m building will have a fundamental period of around 6 seconds, and the spectral acceleration does decrease as the height increases, but that's not the end of the story. Maintaining the weight of a ~4m transfer slab that high off the ground requires extremely high lateral stiffness of the elements below it, which when the ground starts moving, will incur monumental forces.

The building certainly won't collapse, but there will be quite a large amount of damage sustained due to the stiffness irregularity the transfer slab imposes. Of course all of this depends on the severity of the earthquake, but if meaningful damage is sustained between the ground and the transfer slab, it'd very difficult to repair a structure with tensioned lateral systems and deem it safe for reoccupancy.

 

[officedweller]

View attachment 523942


View attachment 523945

Hopefully just 2 bands of the taupe coloured spandrel?

 

[Jeff Morgan]

They are back at it again this morning. Quick shot taken in the rain.

 

[Collingwoodbuildinglover]

And right there shows how much thicker that slab is than all the rest

 

[hansboyca]

Fascinating to see Canadian construction industry measure concrete in cubic meters. It's almost like we live in a metric country. How did we ever move away from measuring concrete in foot-yard freedom units?

A true Canadian would measure it in cubic metres. A meter is a tool to measure. A metre is a measurement.

 

[The Preservationist]

It's really hard to say how long our new skyscrapers will last, as modern reinforced concrete construction techniques haven't been around long enough. 100 year old concrete buildings today were designed and constructed much differently than buildings going up today.

I would say modern construction techniques can be employed due to high fidelity computer stress modelling, allowing for better design life predictability. I would agree with you that there are many other reasons why a building may deteriorate beyond economic repair, well before it reaches its intended structural design life.

 

[wmedia]

Today:

 

[Strange Advance]

I hope it starts shooting up soon. There was a time when it seemed this would be catching up to The One, but that is no longer a possibility.

 

[WalkieScorchie]

Today - you can start to make out the different shaped floor plan on the south side of the transfer slab now.

 

[macro]

This could be the coolest hockey rink ever if it’s not too late to cancel the whole tower thing.

 

[travis3000]

Today - you can start to make out the different shaped floor plan on the south side of the transfer slab now.
View attachment 524716

And the glass looks black in this picture haha.

 

[khris]

View attachment 523944

What is going on with the windows?! There are horizontal lines at differing heights. Looks awful.

 

[Koops65]

 

[wmedia]

Just now. That transfer slab sure is huge. There are also some interesting slanted columns appearing on top of the transfer slab.