{"id":33009,"date":"2025-10-30T12:00:08","date_gmt":"2025-10-30T19:00:08","guid":{"rendered":"https:\/\/essential.construction\/news\/m3-at-m-city-prepares-for-tuned-mass-damper-installation\/"},"modified":"2025-10-30T12:00:08","modified_gmt":"2025-10-30T19:00:08","slug":"m3-at-m-city-prepares-for-tuned-mass-damper-installation","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/m3-at-m-city-prepares-for-tuned-mass-damper-installation\/","title":{"rendered":"M3 at M City Prepares for Tuned Mass Damper Installation"},"content":{"rendered":"

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DEVELOPMENT<\/a><\/span>\u00a0CONSTRUCTION<\/a><\/span>
October 30, 2025 by Anthony Teles<\/span><\/span>\u00a0\u00a0\"-\"\u00a037\u00a0<\/span><\/div>\n

M3 at M City Prepares for Tuned Mass Damper Installation<\/span><\/p>\n<\/div>\n

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Earlier this month, M3 at M City<\/a> celebrated a major milestone with a topping-off ceremony, marking the completion of concrete forming at the top of the building. Rising within the multi-phase M City<\/a> project in Mississauga City Centre, the 77-storey tower designed by Arcadis<\/a> for Rogers Real Estate Development<\/a> and Urban Capital Property Group<\/a>, is now the tallest building west of Toronto in Canada.\u00a0<\/p>\n

Attendees gather on the 77th floor for M3\u2019s topping-off ceremony, image by UrbanToronto Forum contributor steveve<\/span><\/p>\n

As construction transitions to steel girder erection for the peak, crews are also assembling the building\u2019s massive tuned mass damper (TMD); this pendulum system will stabilize the slender structure \u00a0by oscillating opposite to the tower\u2019s movement, ensuring comfort for residents. Adam Segal, Director of Construction at Urban Capital, has provided UrbanToronto with further details on the TMD system and its installation within a three-storey void in the concrete, now awaiting the framework that will hold the TMD, prior to installation of the TMD and enclosing cladding.\u00a0<\/p>\n

Looking northeast to the three-storey concrete shell at the top forming the framework for the tuned mass damper room, image by UrbanToronto Forum contributor drum118<\/span><\/p>\n

A high-angle view into the crown reveals the three-storey concrete chamber, where assembly of the 705-tonne (705,000 kg, or 1,554,258.95 pounds) steel weight is underway. At the chamber\u2019s centre, prefabricated steel elements form the damper\u2019s core frame, while thick counterweight plates are arranged for assembly. These plates were delivered in 65 truckloads, with assembly of the system taking place over roughly two months.<\/p>\n

High-angle view showing the steel components of M3\u2019s 705-tonne tuned mass damper, image by UrbanToronto Forum contributor Tim MacDonald<\/span><\/p>\n

Viewed head-on, this image offers a clear look at the immense steel object forming the core of M3\u2019s TMD, where the labelled steel plates (each etched for identification and alignment) are being positioned within the three-storey concrete enclosure. Next steps include the installation of long-span beams that will suspend the damper from the crown structure above. Yellow ladders and a blue lift remain on site as crews finalize assembly before the system\u2019s tuning phase, scheduled for January, 2026.<\/p>\n

Head-on view of the thick, labelled steel plates forming the core of M3\u2019s tuned mass damper, image by UrbanToronto Forum contributor Tim MacDonald<\/span><\/p>\n

Looking north to M3 from Webb Drive, this image captures the current extent of M City, with M3 dominating the centre. The tower\u2019s open cavity at its crown is visible from grade. Meanwhile, M1 and M2<\/a> (turned 90\u00b0 to each other and distinguished by their accordion-like silhouettes) stand to the right, and the cranes for M4<\/a> and M5<\/a> rise to the left and right foreground, respectively.\u00a0<\/p>\n

Looking north from Webb Drive to M City, with M3 at centre and cranes for M4 and M5 visible in the foreground, image by UrbanToronto Forum contributor ImmenselyMental<\/span><\/p>\n

Coming up, work is beginning on enclosing the TMD chamber, with steel framing soon to complete the west elevation before crown steel is erected. Once this uppermost structure is clad with glazing and perimeter railings, crews will install M3’s BMU, or Building Maintenance Unit, and will then dismantle the external hoists, and finally disassemble the crane, signalling the end of heavy construction as the tower moves toward completion in Summer 2026. At 260.29m with 879 units, M3 stands as both Mississauga\u2019s tallest building and the tallest in Canada outside of Toronto.<\/p>\n

Looking northwest to M3 at M City, M City, designed by Arcadis for Rogers Real Estate Development Ltd and Urban Capital Property Group<\/span><\/p>\n

UrbanToronto will continue to follow progress on these developments, but in the meantime, you can learn more about them from our Database files, linked below. If you’d like, you can join in on the conversations in the associated Project Forum threads or leave a comment in the space provided on this page.<\/p>\n

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UrbanToronto’s research and data service,\u00a0UTPro<\/a>, provides comprehensive data on construction projects in the Greater Golden Horseshoe\u2014from proposal through to completion. Other services include\u00a0Instant Reports<\/a>, downloadable snapshots based on location, and a daily subscription newsletter,\u00a0New Development Insider<\/a>, that tracks projects from initial application.\u200b<\/p>\n\n\n
Related Companies:\u00a0<\/td>\n\nA&H Tuned Mass Dampers<\/a>, Arcadis<\/a>, Cecconi Simone<\/a>, Doka Canada Ltd.\/Ltee<\/a>, Egis<\/a>, EllisDon<\/a>, Motioneering<\/a>, New Release Condo<\/a>, Peter McCann Architectural Models Inc.<\/a>, Platinum Condo Deals<\/a>, Rebar Enterprises Inc<\/a>, RJC Engineers<\/a>, RWDI Climate and Performance Engineering<\/a>, Unilux HVAC Industries Inc.<\/a><\/td>\n<\/tr>\n<\/table>\n

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