41-story
6 below grade parking levels
cast-in-place concrete
Kiara is a 41-story, 440-ft tall luxury apartment tower over a seven level podium with six levels of below-grade parking in Seattle’s South Lake Union neighborhood near Amazon’s global headquarters. This modern, sleek tower features over 460 residential units, 15,600 square feet of retail space, and two rooftop decks – one at the top of the podium with a freestanding outdoor pavilion and the other at Level 41 with lush landscaping and indoor sky lounge. The project is targeting LEED Silver. Construction started in 2016 and completed in summer of 2018.
The structure is cast-in-place concrete with post-tensioned slabs. For seismic resistance, CKC developed a slender core system with multiple tiers of ductility with seismic energy dissipating mechanisms by incorporating steel fiber reinforced concrete (SFRC) in the shear wall coupling beams. SFRC significantly reduced reinforcing bar quantity and improved constructability. SFRC eliminated all diagonal bars that are typically extremely congested and very difficult to install. Performance-Based Design (PBD) provided a means for design of SFRC coupling beams. The below-grade parking from Levels P1 through P3 uses cantilevered transfer beams to maximize the usable square footage for parking.
