Chris Duvall is a Principal at structural and civil engineering firm, Coughlin Porter Lundeen. Chris not only serves as partner to some of the region’s top architects and developers, but helps shape the firm’s future in a fast-growing Pacific Northwest market. He has contributed to flagship timber projects in most major markets including education, office, residential, and civic with the use of CLT and other Mass Timber products. Chris serves as co-chair of AIA Seattle’s Mass Timber Committee and he has contributed to various studies concerning the use of CLT in the Pacific Northwest. He has led efforts to successfully propose alternative building materials to local jurisdictions for structural systems not pre-approved by the building code, specifically the use of mass timber and concrete composite floor systems. Chris has presented nationally and continues to push mass timber research and applications forward.
Joseph Mayo is an architect in Seattle at Mahlum and author of the book Solid Wood: Mass Timber Architecture, Technology and Design, the first book devoted solely to mass timber commercial buildings. At Mahlum he advised on the first installation of Oregon-made structural cross-laminated timber (CLT) in the country at Western Oregon University’s Richard Woodcock Education Center. He recently completed a series of three CLT classroom buildings in Washington State and is currently designing modular CLT townhomes as part of a 2018 Wood Innovation Grant from the US Forest Service. An advocate for the use of mass timber, Joe has worked with the City of Seattle Department of Planning and Development and Washington State non-profit Forterra to lead investigations into the use of wood that transcend current building codes. He is currently working with AIA WA Council on a state-wide building code change proposal to allow a greater use of mass timber in Washington. He has also been a jury member for wood design awards, served on local and national AIA Committees, co-authored a research paper exploring the economic viability of tall wood buildings, and assisted in teaching mass timber courses.
Jonathan (Jon) Siu
Jonathan (Jon) Siu serves as the Principal Engineer/Building Official for the City of Seattle’s Department of Construction and Inspections (SDCI), a position he has held for the last 18 of the 34½ years he has been with the various incarnations of the department. Jon has served on many committees for national code and standards development organizations, including the International Code Council (ICC), and the American Society of Civil Engineers (ASCE). He is currently the vice-chair of the ICC Ad Hoc Committee on Tall Wood Buildings. A licensed civil and structural engineer in the State of Washington, Jon previously served on the executive board of the Seattle Chapter of the Structural Engineers’ Association of Washington (SEAW), and is a past president with the Washington Association of Building Officials (WABO). In his spare time, Jon teaches ATC-20 classes and is helping to organize a statewide disaster response program for volunteer engineers, architects, and building officials. Jon received his Bachelor and Master of Science degrees in Civil Engineering Structures from UCLA.