With mageba bearings isolating a new upmarket condominium building in Toronto from vibrations caused by an adjacent underground railway, the residents can be sure of a good night’s sleep
An exclusive new condominium building on Bloor Street in Toronto’s west end, to be known as 4 The Kingsway, will offer exceptional comfort to its residents – not least in terms of the protection it provides against structure-borne noise and vibrations. The eight-storey building is being built adjacent to an underground rail line, so vibration isolation was a key requirement in the structure’s design and construction.
Thanks to its strong background in providing vibration isolation solutions to construction projects around the world, mageba was well placed to develop and supply a complete solution. The approach to vibration isolation employed, using VIBRAX®BLOCK bearings, is based on the use of a special compound that enables each bearing to not only resist vertical loads, but also to dampen all vibrations acting on them. This is achieved by designing bearings (generally an iterative process requiring static calculations and determination of dynamic values for given load situations) with several layers of suitable elastomer, separated by steel plates which increase vertical load capacity.
In total, 421 VIBRAX®BLOCK bearings were designed, fabricated, and – following successful static deformation testing with a tolerance of just +/- 15% – installed at appropriately selected locations to isolate the building’s superstructure from its substructure. The bearings were designed for loads ranging between 90 kN and 900 kN, and manufactured using natural rubber (NR) with a Shore A hardness of 50 +/– 5 which provides high tensile strength, elasticity and cold flexibility – and, of course, high isolation against vibrations. Some of the bearings were designed with an external steel plate vulcanized into the bottom surface to facilitate anchoring to the substructure.
VIBRAX®BLOCK bearings are also used for a wide range of further applications, such as isolation of vibrations from overhead bridge cranes and insulation of structure-borne noise from building service installations such as lifts and air-conditioning units. Should you require support in developing a solution for any specific application, please contact us at