Providing a competitive cost advantage compared to a steel special concentrically braced frame (SCBF) lateral system, Tilt-Up was selected for the 36,300 square metre facility because the concrete shear walls provide a longer lasting, more durable exterior that improves energy performance due to their inherent thermal mass. Further, the Tilt-Up shear walls at the exterior of the building provided flexibility for the current layout as well as for future renovations while also reducing the need for interior brace frames. This is the first concrete hospital/healthcare facility of its size to use Tilt-Up panels for the primary lateral force resisting system. Since the project was located in a high seismic region, the engineers worked with the contractor to design custom-welded hold-down details that are capable of transmitting the high shear and overturning forces as well as allow for the necessary erection tolerances.
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