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Yolles has virtually built Toronto.

A tour of the city centre reveals structure after structure engineered by the practice, with top name architects including Santiago Calatrava and Moriyami & Teshima.

Current schemes include the Leslie Dan Pharmacy Building at University of Toronto designed by the UK's Foster & Partners with Moffat Kinoshita, which features two classrooms hanging from the superstructure, and the incredibly slender One King Street West, a 52 storey condominium hotel which has a height to width ratio of 11:1.

The company has had to develop a tuned mass damping system - effectively a tube of water - to counter sway at the top.

Yolles founder Morden Yolles' father was the man who inspired Canary Wharf developers, the Reichmann Brothers, to develop their vision of high quality office buildings. Yolles worked with them in Toronto as well as on the first phase of London's Canary Wharf, and opened an office in London in the early 1990s. The firm's local practice is involved in rebuilding the capital's Barts and London Hospitals.

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