SoMa Towers

SoMa Towers

Envisioning Architectural Ingenuity: Engineering a unique mixed-use building in downtown Bellevue’s core

DCI Engineers is providing structural engineering services for both Phase I and II of SoMa Towers developed by local developer John Su. Phase I includes one of two residential towers, partial podium levels, and the northern portion of the below-grade parking garage. The triangle shaped balconies are relatively large and continuous as they grow out towards the edge of the building; DCI used sloping columns to grow with the canopy in order to provide an architectural and structurally appealing statement. Sloping columns were also used to resolve conflicts between the garage and residential floors. Amenities for Phase I of SoMa Towers includes underground parking complete with electrical charging stations, an outdoor terrace for gathering space, a lounge and sports bar, and a penthouse lounge complete with a gourmet kitchen.

Project Highlights

  • DCI’s design included balancing the sloping columns that carried significant gravity loads to avoid lateral load effects. This was important to the project as SoMa Towers is located in a high seismic region where inelastic deformation may occur during a severe earthquake. 
  • Approximate square footage for Phase I is 199,283-sf and includes 112,000-sf of residential space, 6,500-sf of amenity space, 18,000-sf of community and commercial oriented spaces, and 62,783-sf parking space below grade
  • Constructed with PT slabs and CIP concrete columns and walls.
  • Pending LEED sustainable design.
Location: 
Bellevue, Washington
Square Feet: 
199,283-SF
Stories: 
24
Primary Material: 
Concrete
Type: 
Civil
Structural
Sector: 
High Rise
Residential

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