Issue link: http://digital.canadawide.com/i/175815
symbolizes some of these hurdles. Chris Pommer discovered that the entire area needed reroo ing with proper insulation and a new membrane; this added time and expense to the project. "It also added approximately ive inches to the roof's height, which meant that the original concrete balustrade was now too short and didn't meet code. Because it was heritage, the balustrade couldn't be changed, so we had to devise a way to meet code but not detract from the building." The resolution turned into "a happy accident. We installed a woodand-stainless-steel guardrail with a hidden LED strip. This not only gave us the desired lighting and code compliance, but the rail itself appears virtually invisible from the Square." LEED lighting requirements were challenging, according to Ion Luh, director of lighting design at Consullux Lighting Consultants, a subsidiary of Crossey Engineering, given "the light pollution concerns of an open square in a major urban setting." Her solution was using Nathan Phillips Square Revitalization p.44-45Nathan Phillips.indd 45 ixtures with full cut-off – that is, no light distributions over and above 80 degrees. A greater challenge was dealing with the existing physical conditions: a vast, open square with no architectural elements to attach lighting to. The answer was supplied by the architects. LEED-compliant halogen, luorescent and metal halide lights, all controlled independently, would be inserted in the roof's underside of the new, permanent, outdoor theatre stage being built in the Square. Under-the-roof lighting also went into the refurbished skating pavilion beside the re lecting pool/rink. Around the Square, pathway lighting and custom low-level lanterns attached to seating would offer subtle radiance, while LEDs would be used for in-ground linear markers, bench undersides and handrail illumination in the podium roof garden. Crossey's senior electrical project manager, Leo Lee, dealt with an ancient 240/416 voltage system that required special replacement parts, but says his group's biggest effort was physically running the large, 1,600amp feeder lines from the furthest part of City Hall through the basement storage and archive area, and across the underground parking garage. As for LEED-approved mechanicals, Andrew Pratt, principal and vice-president for Crossey, was able to tap into the city's Enwave deep lake water cooling and steam heat facilities, plus install a recyclable rainwater cistern to irrigate the podium roof garden as well as run the low- low toilets and urinals in the skate pavilion and theatre stage buildings. Shawn Thacker, project coordinator for PCL Constructors Canada Inc. calls the project "unique." He most enjoys the way the designers have managed to maintain a balanced dialogue with Revell's original creation. The combed limestone panels on skate pavilion, for instance, which are in keeping with the vertical striations big and small in the City Hall's two towers, and the overall colour scheme of neutral grey mixed with plenty of brown tone. Then there are the V-shaped columns of the theatre stage's roof that speak to similar columns supporting the central council 'saucer section.' The small details particularly please him, such as the way the front side of the podium roof employs white and grey paving stones set in a shadow pattern that mimics the rectilinear planters, and how the roof's bollard lights emit a laser-cut pattern that echoes both the planter scheme and the interior lobby's terrazzo loor (inlaid by Revell using Carrera marble offcuts from the twin tower's facade). Chris Pommer says the rejuvenation process is only mid-way complete, with some elements of his original scheme, such as a planned two-storey restaurant, delayed until further notice. But, "it's organic in nature and you have to roll with it. This is such an involved project, such a complex site and a complex client [consisting of] the city itself, with lots of departments and different user groups, plus the public and their diverse user groups and needs. Approvals, stakeholder meetings, elections – we're undergoing a constant evolution." ■ LOCATION 100 Queen Street West Toronto, Ontario OWNER City of Toronto ARCHITECTS/ LANDSCAPE ARCHITECTS PLANT Architect Inc. / Perkins + Will, Architects in Joint Venture LANDSCAPE CONSULTANTS Hoerr Schaudt Landscape Architects Inc. GENERAL CONTRACTOR PCL Constructors Canada Inc. STRUCTURAL CONSULTANT Blackwell Bowick Partnership Ltd. MECHANICAL/ ELECTRICAL CONSULTANT Crossey Engineering Ltd. LIGHTING CONSULTANT Consullux Lighting Consultants FURNITURE CONSULTANT Adrian Blackwell Urban Projects TOTAL AREA 570,280 square feet TOTAL CONSTRUCTION COST Undisclosed OCTOBER 2012 /45 9/11/12 11:48 AM