Tender: Boreal Centre for Bird Conservation — Roof Cable Truss Lift and Tensioning

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Boreal Centre for Bird Conservation is seeking a contractor to raise the inverted roof cable trusses and tighten the threaded swage connectors at each cable end to restore the roof line after excessive winter snow load. The Gold Leeds building’s inverted roof is supported by Glue Lam Beams and ½ Cable Trusses and the roof center dropped by 4 inches; the contractor must provide all equipment, trades and supplies to install blocking between individual top chord 2x8 members (spaced no further than 1.5m apart) prior to raising, shore each truss at mid-span to incrementally lift trusses (a total of inches vertically) while ensuring adjacent trusses are raised simultaneously with no more than 2 inches differential, tighten cables equally at each end using half-rotation increments until shoring load is reduced, perform all work under oversight of a professional engineer supplied by Parks, and remove all debris and garbage.