January 3, 2025

Concrete to flow Saturday at Sloane

Photo courtesy of Cary Kopczynski & Company [enlarge]

The project site in December, ahead of the mat pour. Seattle House can be seen under construction in the background.

The mat pour for Sloane, Holland Partner Group and NASH Communities' 45-story residential high-rise in the Denny Triangle is scheduled to take place this Saturday.

The milestone construction moment will start at 1:30 a.m. and is expected to continue until about noon.

The project site is at 616 Battery St., aka the former home of an Elephant Car Wash, long since demolished and pink neon signs removed.

Holland, which handles construction in house, began the early groundwork for the new building in late May.

When it opens, the residential tower will have 442 apartment units. Those will be served by five levels of subterranean parking with 262 parking stalls. The building will also have approximately 2,500 square feet of retail and luxury tenant amenities, including a rooftop space with views of the Space Needle, Elliott Bay and South Lake Union.

Rendering by BOGZA for Weber Thompson [enlarge]

Sloane will have 442 apartment units and is designed by Weber Thompson.

Construction is scheduled to be completed in late 2026.

Sloane is designed by Weber Thompson. Cary Kopczynski & Company (CKC) is the structural engineer.

The tower's foundation will consist of a mat that covers the site's footprint and is designed to handle gravity and lateral loads while meeting settlement criteria. Sloane's structural system is a performance-based lateral-force-resisting system, combining shear walls with steel fiber-reinforced concrete coupling beams to resist seismic loads.

The building's floor slabs will be 8-inch-thick post-tensioned concrete, which CKC says will optimize both efficiency and structural performance.

Sloane is located behind another forthcoming Denny Triangle high-rise development Seattle House. That project, which will have two 45-story residential towers atop a shared podium level, is expected to top out later this month.

Seattle House is being developed by Concord Pacific, based out of Vancouver, B.C., in partnership with Seattle real estate developer HB Management. Arcadis is the architect. CKC is the structural engineer.