Council on Tall Buildings and Urban Habitat
CTBUH Seattle YPC Hosts a Tall Timber Seminar
June 22, 2017
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SEATTLE – On Thursday, June 22, the CTBUH YPC had the opportunity to hear industry experts speak about their experiences in tall timber. The event, hosted by Dassault Systemes atop their stunning office rooftop overlooking Westlake Union, featured speaker presentations by Bernhard Gafner, Partner, Aspect Structural Engineers, and Javier Glatt, Co-Founder and CEO, CADMakers, followed by a networking event with appetizers and drinks.
Bernhard Gafner, Partner, Aspect Structural Engineers, provided an overview of tall timber and its capabilities.
Bernard Gafner began with a presentation that offered an overview of tall timber, focusing on the properties and capabilities of certain building materials such as CLT, NLT, and Glu Lam. He also summarized the prefabrication benefits and disadvantages of tall wood and steel / concrete. Gafner noted that the industry has not yet decided on a CLT standard practice related to floor-to-floor heights and product thickness (for example, five- versus seven-ply). He then described several challenges in CLT procurement and installation. As there are currently only five producers of CLT in North America, finding installers who are familiar with the product can be difficult. He mentioned that at Brock Commons, Seagate was the CLT installer and Structurlam provided the material out of British Columbia.
After the presentation, event participants network over drinks The event was kindly sponsored by Dassault Systemes.
Javier Glatt followed Gafner’s presentation with an overview of how modeling a building’s structure, MEP systems, and finishes can determine the success of a project. CADMakers was able to provide erection sequences, highlight complex connections, and build digital mockups for the Brock Commons high-rise project. At Brock Commons, the contractor, MEP subcontractors, and consultants were all contracted during the design drawing phase. Early and direct pre-planning and coordination was crucial in the project’s success. Glatt also focused in on several lessons learned related to pre-planning and the use of CLT, which included three-and-a-half months taken off the construction schedule, substantial savings of general conditions, large reductions in on-site labor, and material optimization, which minimized construction waste.

The event concluded with a word of thanks to the sponsors, as well as the opportunity to ask the presenters additional questions, mingle with fellow attendees, and enjoy appetizers and drinks.
Jerry Lee Cary Kopczynski & Co.
Andy Tu Cary Kopczynski & Co.
Natasha Epstein CollinsWoerman
Ryan Ganey Coughlin Porter Lundeen
Jerry Jackson Dassault Systemes
Sean Augustino DCI Engineers
Tyler Winkley DCI Engineers
Andrew Makdisi Hart Crowser
Brice Exley Hart Crowser
Erik Ellingsen Hart Crowser
Eli Hardi Hewitt Architects
Alec Thomas Katerra
Alex Wiley Magnusson Klemencic Associates
Jeremy Hasselbauer Magnusson Klemencic Associates
Joseph Piotrowski Magnusson Klemencic Associates
Kevin Aswegan Magnusson Klemencic Associates
Leif Johnson Magnusson Klemencic Associates
Justin Bise NBBJ
Justin Ryor Skanska
Stephen Welch Skanska
Luis Adan Urban Visions
Jim Waymire WATG Urban
Jim Waymire WATG Urban