Bit by bit, Mizrahi DevelopmentsThe One moves closer to being the first supertall building to grace Toronto's skies. Last month, the uniquely designed tower saw the walls of its fifth level poured. This month, its sixth floor slab has been poured and levelled, with every step along the way having been documented by UrbanToronto Forum contributor thaivic from their office at 2 Bloor West.

According to the architectural plans of the development, the sixth level is the final non-repeated level in the tower. This means that once the forms for the 7th level are created (the first floor of the hotel), the levels following it will be able to be formed at a quicker pace, as the forms will be reused floor after floor. New forms will be needed again for the mechanical levels and condo levels.

Teams laying rebar on the 6th level of The One, image by UT Forum contributor thaivic

Earlier in November, we saw construction teams laying down the rebar of the 6th level on top of its steel decking. The intricate mesh of steel rebar reinforces the concrete slab, giving it considerable strength. At the top of the photo above, you can see that some of the concrete has already been poured as the crew continues to work on the rebar closer near the bottom of the image.

Concrete pour commencing on the 6th level of The One, image by UT Forum contributor thaivic

A little while later, more of the concrete pour has happened, and the crew is now working to ensure that it is evenly spread across the slab, submerging the recently laid rebar. We can see the bright red concrete pump to the south of the level, its extendible arm able to reach to the sections where the crew needs it next. 

As we can see below, the crew uses placers — wide, flat bladed tools that push, pull, level, and smooth the liquid concrete.

Closer look at concrete being spread by teams, image by UT Forum contributor thaivic

Finally, the 6th level was fully, evenly covered with the concrete from the pour, and was left to cure. Looking ahead, the 6th floor will become a shared amenities level for both the hotel and condo, while the upcoming 7th floor will be home to the first of 10 floors that will house hotel suites.

The One's poured and levelled 6th floor, image by UT Forum contributor Benito


The 17th and 18th levels will be a mechanical suite for the building's lower floors, then residential levels — with another set of repeating layouts — begin on the 19th level.

Designed by UK-based architects Foster + Partners with Toronto's Core Architects, The One was approved at a height of 85 storeys, 308.6 metres. The building is among the pair of projects currently contending for the title of Canada's tallest building, along with the 312.5-metre SkyTower at Pinnacle One Yonge, which is now in the early stages of construction only a couple of kilometres to the south.

94-storey version of The One, image courtesy of Mizrahi Developments

Mizrahi Developments has applied for an increase in height and density for The One to rise to 94 storeys and 338.3 metres high. If the increase is permitted, The One would take the record as the tallest building in the country.

You can learn more from our Database file for the project, linked below. If you'd like, you can join in on the conversation in the associated Project Forum thread, or leave a comment in the space provided on this page.

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