{"id":12793,"date":"2023-02-07T13:59:17","date_gmt":"2023-02-07T21:59:17","guid":{"rendered":"https:\/\/essential.construction\/news\/hardhat-tour-of-the-one-getting-up-close-with-the-building-core-and-construction-systems\/"},"modified":"2023-02-07T13:59:17","modified_gmt":"2023-02-07T21:59:17","slug":"hardhat-tour-of-the-one-getting-up-close-with-the-building-core-and-construction-systems","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/hardhat-tour-of-the-one-getting-up-close-with-the-building-core-and-construction-systems\/","title":{"rendered":"Hardhat Tour of The One: Getting Up Close With the Building Core and Construction Systems"},"content":{"rendered":"

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Pursuing the title of Canada\u2019s tallest building, The One<\/a> has been the most recognizable building on UrbanToronto for more months than we can count. Most of our readers could identify the exterior of the Mizrahi Developments<\/a> building from virtually any angle, but even with this ubiquitous popularity, the opportunity to see the building from the inside has remained elusive, granted only through third-party drone ‘flythrough’ videos<\/a> \u2014 until now.\u00a0<\/p>\n

UrbanToronto was invited for a hardhat tour of the site to observe for the first time how the construction of the tower\u2019s interior is progressing. Guided by Esteban Yanquelevech, Vice President of Construction at Mizrahi Developments, we explored the site up and down, and will be reporting on what we saw over two articles, beginning with a look at the building\u2019s core and its sophisticated construction systems.\u00a0<\/p>\n

East-facing view of The One from the construction entrance through the western laneway, image by Matias Bessai<\/span><\/p>\n

The first stop on our tour was the 6th level terrace, a future outdoor amenity space which is currently being used as a staging area for various materials and equipment, and also happens to be the home of the city\u2019s most photographed crane.\u00a0<\/p>\n

Looking up the the south elevation of The One from the 6th floor terrace, image by Matias Bessai<\/span><\/p>\n

On lease from construction equipment supplier Morrow, the huge crane is a luffing boom model, made by German manufacturers Liebherr. Unlike flattop or hammerhead cranes, luffing boom cranes have the ability to raise and lower their boom (the arm of the crane), minimizing the turning radius and ultimately allowing the machine to be more adaptable to the varying conditions of tight urban sites.\u00a0<\/p>\n

The crane is positioned in a top climbing configuration, which allows the cabin and boom to be lifted by adding more sections over time as needed to the crane\u2019s mast, a feat achieved with the help of a hydraulic system built into the crane itself. Rather than rising directly from the building\u2019s centre, the crane is positioned to the south of the building frame, and fixed to it with a custom tie-in system pictured below.\u00a0<\/p>\n

Close up of the crane’s tower, fixed to the building with custom tie-ins, image by Matias Bessai<\/span><\/p>\n

While standard tie-ins position the crane anywhere from 1 to 3 metres from the edge of the building, The One requires a much more significant gap to leave ample space for the protruding Automated Climbing System (ACS) used to form the floors. Constructed with a pair of massive steel I-beams, the two tie-ins currently in use are fixed to the crane via the standard square mount, and run across to the tower where they are anchored to now cured floor-plates, below where the latest forming work is taking place.\u00a0<\/p>\n

From the 6th floor, we took the next hoist up as high as it went, to floor 13, to get a close up tour of the tower\u2019s core. Exiting the hoist, we took the stairs up one more level, where we were able to walk into the future hallways of the 14th floor, the centre of the tower\u2019s floor-plate, and look all the way up to the underside of the ACS, six storeys above.\u00a0<\/p>\n

Looking up at the underside of the ACS and Gantry Crane from inside the tower’s core, image by Matias Bessai<\/span><\/p>\n

Slabs just like the 14th floor one we stood on, along with extending the elevator shafts upwards, will soon be created on every floor above us, but for now, more work is required to complete the 14th floor elevator shafts. Composed of reinforced concrete walls, the construction of the elevator shafts, following several floors below the surrounding sections of floor-plates, is a complex process that is made easier with the assistance of a gantry crane.<\/p>\n