Topping Out: Seattle’s Rainier Square Tower

On August 9, Seattle’s Rainier Square Tower topped out at 58 floors. Designed by architect NBBJ with structural engineer Magnusson Klemencic Associates (MKA), the 850-foot-tall tower is being built with a revolutionary new sandwich panel system developed by MKA—a steel/concrete composite core wall that is expected to take 40% less time to build than a reinforced concrete core surrounded by a steel perimeter frame.

“We are absolutely delighted with the outcome of the steel fabrication and erection,” says Ron Klemencic, P.E., S.E., Hon. AIA, Chairman and CEO of MKA. Everything went better than hoped for, from tolerances to field fit-up to erection speed. Ten months to erect 64 levels of steel floor framing—on time!” To learn more about the project, click here.