111 East Grand will be the first multi-story office building in North America to employ dowel laminated timber (DLT), a mass timber system relying on friction-fit wood connectors for strength and durability. Anchoring a 265’ x 65’ East Village site two blocks from the Des Moines River, the building contains four 16,000-sf levels for a total of 65,000-sf. Retail activates street level, with three floors of office space above.
Spruce glulam beams and columns frame the 40’-0” x 6’-4” DLT panels that serve as floors and roof. The system facilitates quick erection time and a smaller site crew, minimizing the disturbance to the neighborhood during construction. Precast concrete walls and buttresses anchor the south portion of the building and assist as the service core.
The wood construction’s refined aesthetics enables the structure to remain exposed as an interior finish. This minimizes tenant improvement work and minimizes chemically impregnated finishes. Operable windows within each structural bay allow natural ventilation. Balconies on the east and west take advantage of downtown views. Stained Accoya wood on exterior soffits and columns complements the exposed wood interior. Black, interlocking Zalmag panel rainscreens clad the east, north, and west elevations.
The project is anticipated to be completed in the first quarter of 2019 and is funded by the developer team of Tim Rypma, Paul Hayes with JSC Properties, Jake Christensen, and Sloan Cownie at an estimated cost of $14 million. The design team, which includes Raker Rhodes Engineering and Civil Engineering Consultants, has been closely collaborating with StructureCraft from British Columbia as the mass timber engineers and suppliers and Ryan Companies as the construction manager and project contractors.
111 East Grand, LLC
Des Moines, Iowa