[Burnaby] Concord Metrotown (Former Sears site) | 65,45,33 fl | 230.1m | U/C

[vanman]

Thanks for the pics!

[officedweller]

I wonder if that's for a massive raft slab?

[Lexus]

Originally Posted by officedweller

I wonder if that's for a massive raft slab?

I'm pretty positive it is!

[Spr0ckets]

Originally Posted by officedweller

I wonder if that's for a massive raft slab?

Probably for the core foundation (for the Grand tower) rather than having separate or separated footings.

When footings are too close, you're better off just merging them into a raft like that

[jollyburger]

I wonder what's with that pipe setup on the bottom left.

Is that dry brown dirt something they trucked in or is that what they've been removing?

[Lexus]

2023, Apr 26

Untitled by Lexus LX600, on Flickr

Untitled by Lexus LX600, on Flickr

Untitled by Lexus LX600, on Flickr

[CCRC]

I can't believe they are building This Chonk Mister

It will be one tall building

[madog222]

Thanks for the update lexus, great vantage point there.

[jollyburger]

Looks like they will be ready to pour soon.

• Video Link

[officedweller]

I think I remember that same style of rebar scaffolding/supports for The Alberni.

[LeftCoaster]

I think you may be remembering Vancouver House.

[madog222]

This is where there are voids within the single pour foundation slab with the formwork forever entombed?
What is the proper term?

[officedweller]

Originally Posted by LeftCoaster

I think you may be remembering Vancouver House.

You made me go look.
This is from The Alberni.

Originally Posted by Zepfancouver

[madog222]

^
Right, void of rebar, not of concrete. Tensile void.

Originally Posted by Marshal

Forgive me if I am over-explaining, but:
There are two kinds of voids in poured concrete construction. One where no material is required (there is no structural requirement). These can be formed in the standard way, such that when the pour is complete the void includes the wood formwork which is trapped and air, or by other methods, for example, a hard foam shape used to form the void, which is then trapped by the pour and becomes what constitutes the void. It depends on what the engineer is doing at that location, and/or what is cheaper overall (with regard to material and labour costs for construction). A second version is a tensile void. This seems to be the case with Vancouver House. They need a large mass, so they want to fill that whole area. But, there is no need for reinforcing steel in the central part of the volume. So they are using the scaffolding to support the rebar placement above the void until the concrete is added. Once the concrete is in place, the scaffolding is dumbly trapped within but serves no purpose any longer. The end product is a large volume of concrete with an 'empty' box of rebar inside it.

[jollyburger]

I think Gilmore Place used that in this one tiny section of the foundation?



https://skyscraperpage.com/forum/showpost.php?p=9421015&postcount=1196

[officedweller]

So the "void" refers only to the absence of rebar, not the absence of concrete(?).

[madog222]

Yup, no rebar so it's void of tensile strength in that area.

[LeftCoaster]

Originally Posted by officedweller

You made me go look.
This is from The Alberni.

Yep on re-read you are definitely right. I thought you were talking about the HSS corner support that was definitely Vancouver House.

[Lexus]

2023, May 2

Untitled by Lexus LX600, on Flickr

[Zepfancouver]

This is one of the largest mass pour that I've seen on SSP, we must capture the concrete flowing into this one.
Question for Lexus, How high did you reach up and can you get a full view of the pad and less of the guardrail by raising the camera a few feet ?

EDIT: I re-watched the above video, It wont be easy to capture, on the day of the pour, we wont have access to most areas.