111 East Grand Office
The First Dowel-laminated Timber Office Building in North America
111 East Grand Office is the first spec office building in downtown Des Moines in over a decade, with a prominent location next to city hall. As the design-builders for the timber superstructure, we worked alongside Neumann Monson architects. The 4-storey mass timber building has retail at the first level, with 3 levels of commercial office space above. The structural gravity system is DLT (dowel-laminated timber) panels over Glulam post and beam substructure. The lateral system is comprised of pre-cast concrete walls and core, creating a fully pre-fabricated superstructure that could be installed much faster than conventional construction.
StructureCraft won the project after submitting a response to request for Design-Build proposals in Fall 2017, joining the team of Ryan Co., Neumann Monson and Raker Rhodes. We were chosen for our extensive engineering and construction experience in large North American mass timber jobs, as well as our turnkey delivery method. Our engineering role is to take the timber superstructure from schematic design to detailed fabrication design, sealing the drawings with our in-house licensed P.E.
This project displays a simple, efficient, yet elegant mass timber design leading to a fast site installation.
Each DLT panel was fabricated with shallower boards at its edges to create chases for housing electrical conduits.