45 Strachan Tower

Located within the Garrison Point master plan, 45 Strachan Avenue is a 39-story residential tower developed by BK Prime Ontario I LP. Designed by Hariri Pontarini Architects and constructed by EllisDon Residential Inc., the building features 433 rental units and ground-level retail, helping redefine Toronto’s waterfront-adjacent skyline.

Central to the building’s operations is the elevator machine room, positioned on the 38th floor within the mechanical penthouse. Due to its proximity to both occupied residential floors and the rooftop amenity space, controlling structure-borne sound from elevator equipment became a top priority for the project team. The high-rise configuration introduced several design and construction challenges:

• Temporary shoring load demands: The concrete pour for the 20 cm (8”) thick floating slab required accommodation of construction loads up to 6,745 lbs (30 kN) per leg.
• Equipment sequencing constraints: Vertical transportation equipment had to be installed before the floating slab pour, limiting access for post-installation adjustments.
• Strict performance requirements: Acoustic and structural benchmarks had to be met within a tight construction schedule, all while working in a confined, high-elevation mechanical space.

The team at CDM Stravitec, together with acoustical Consultant HGC Engineering, devised a solution, a hybrid floating floor system combining two proven vibration isolation solutions:

• Stravifloor Mount provided full-surface, modular isolation beneath the entire slab, ensuring uniform acoustic performance and supporting both temporary and permanent loads.
• Stravifloor Jackup-E housings were strategically placed to offer discrete load-bearing support with post-pour jacking capability. Once the slab was cured and the shoring removed, the bolts from the Jackup-E system were extracted, and the holes were sealed, preserving the system’s performance and structural integrity.

This tailored solution enabled the pre-installation of elevator equipment without sacrificing access to jack-up points and fine-tuned elevation control of the floating slab. All while maintaining the target natural frequency below 8 Hz at the acoustic design load (ADL).

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