RWDI was retained to assess the wind loads for designing the exterior envelope of the proposed U of T Tall Wood Academic Tower in Toronto, ON. The academic tower is a 74 m (15-storey) tall wood structure. The tower will be located to the north end of Site 12 on top of the Common Service Bay of the Goldring Centre for High Performance Sport.
(1) The wind tunnel test procedures met or exceeded the requirements set out in the NBCC 2015.
(2) A mean-hourly wind pressure of 0.44 kPa (wind speed of 26.1 m/s) at 10 m height in open terrain adopted for wind loading predictions. All predictions were derived using a statistical wind climate model developed for the area.
(3) Recommended cladding design wind pressures are provided in Figures 4 to 13.
(4) The wind pressures provided in this report do not contain safety or load factors and are to be applied in the same manner as would wind loads calculated by code analytical methods.
(5) The largest recommended negative cladding wind pressure was -2.25 kPa, which occurred on the edges of the West and East Elevations (see Figures 5 and 7). The majority of the negative wind pressures were in the range of -1.25 kPa to -1.75 kPa.
(6) The largest recommended positive cladding wind pressure was +2.25 kPa, which occurred on the parapet at level 4 on the West Elevation (Figure 10). The majority of the positive wind pressures were in the range of +1kPa to +1.5 kPa.
(7) The recommended cladding wind pressures are in line with expectations based on RWDI’s experience of tests on similar structures.
(8) The recommended design wind pressures either include an internal pressure allowance or represent the instantaneous differential pressures across protruding elements exposed to wind on opposite sides.
(9) The design wind pressures in this report may be combined with appropriate tributary area reduction factors provided in Image 2 from Section 3.4