When it’s completed, the 12-story Framework project in Portland, Oregon is expected to be the tallest timber building in the U.S. A winner of the U.S. Tall Wood Building Prize Competition, it is also remarkable for its use of an innovative rocking timber wall system, designed to increase the building’s resilience and provide high seismic performance. This presentation will provide an overview of the structural design of this mass timber project, with particular focus on the lateral force-resisting system.

Time: 12:00pm – 1:00pm Central
Cost: Free

Design and modeling approaches to the use of CLT diaphragms in a tall timber building in high seismic regions will be highlighted, as will design of the rocking wall system and the research and testing used to demonstrate its above-code performance.

Framework, Portland Oregon | Image: LEVER Architects


Eric McDonnell, PE, KPFF Consulting Engineers
Eric is an Associate in KPFF’s Portland office. Having been largely shaped by his past work experiences in San Francisco and post-earthquake Christchurch, Eric is well positioned to bring knowledge of the latest techniques of resilient seismic design to his projects. With a passion for structural detailing, Eric excels in the coordination of structural elements with other design disciplines, along with the design, research and implementation of innovative structural systems. Eric has a broad knowledge of all building materials, including mass timber where he has remained at the forefront of the emerging mass timber industry standards. Applying these technical strengths, Eric has utilized CLT as a primary structural element on several built projects.

Reid Zimmerman, P.E., S.E., KPFF Consulting Engineers
Reid graduated from the University of California Berkeley in Structural Engineering, Mechanics and Materials and has since focused his career on advanced structural systems, performance-based seismic design and complex analytical techniques for earthquake engineering. He has been involved in both design and peer review of buildings utilizing earthquake protective systems, such as rocking/re-centering systems, and regularly implements nonlinear response history analysis on his projects. One of Reid’s passions is translating experimental research and new ideas into innovative structural solutions. He also sits on the national building code committees that shape future editions of structural standards in the United States.