Early in design, MBJ was heavily involved in supporting the team by evaluating several structural system options including cold-formed steel, composite steel, and concrete to identify the most efficient approach. While CFS was originally favored, market conditions led to a switch to post-tensioned concrete. The flexibility of the two-way flat plate concrete system helped MBJ to develop a column grid within a floor plan that was originally laid out for a bearing wall system. Due to the site’s expansive native soils, the foundation system utilizes drilled concrete piers that extend to bedrock, bypassing the problematic soil conditions. The building’s lateral system is a flat plate moment frame system that provides for maximum flexibility in the floor plan by reducing shear walls. At the fifth floor, the floor plate steps inward resulting in a column line that is off grid and requiring a series of PT transfer beams to support the roof structure. Two first-floor courtyards, including a pool, further demonstrate the flexibility of the post-tensioned system to accommodate complex amenity spaces.