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Webinar – CLT Diaphragm Design: New Code Provisions and Design Examples

December 9, 2020 – 12:00 pm - 1:00 pm




Join at 10 am Pacific, 11 am Mountain, 12 pm Central, 1 pm Eastern

The use of cross-laminated timber (CLT) for structural floor and roof panels has seen incredible growth in the US over the past decade. However, until now, CLT had not been codified for use as part of a seismic or wind force-resisting system—either as a diaphragm or shear wall. As a result, CLT diaphragms have had to be approved through alternative means or include a structural topping, such as a layer of wood structural panels or concrete. This webinar will introduce new provisions for CLT diaphragm design that will be included in the American Wood Council’s 2021 Special Design Provisions for Wind and Seismic (SDPWS), which will be the code-referenced standard for guidance on CLT diaphragms. Following a discussion of the new SDPWS provisions, CLT diaphragm detailing options and design examples will be presented to demonstrate practical design techniques along with structural detailing challenges and solutions.


Philip Line, PE, American Wood Council

Philip is AWC’s Director of Structural Engineering, and has 28 years of experience in structural engineering, building codes, standards, and guideline development. His responsibilities include planning of structural research and working with AWC’s consensus standards committee to update the National Design Specification® for Wood Construction (NDS®), Wood Frame Construction Manual (WFCM), and Special Design Provisions for Wind and Seismic (SDPWS). Phil participates in International Code Council (ICC) code development hearings, ICC-ES product evaluation hearings, seismic committees of the Applied Technology Council and Building Seismic Safety Council, and in ASTM and American Society of Civil Engineers (ASCE) consensus standards committees.

Scott Breneman, PhD, PE, SE, WoodWorks

Dr. Breneman is a licensed Structural Engineer and Professional Engineer in the State of California, a PE in the State of Washington, and Senior Technical Director – Mass Timber in the Project Resources & Solutions Division of WoodWorks. He received bachelor’s and master’s from the University of Florida and a doctorate from Stanford University. Scott has experience with structural design, seismic rehabilitation, and peer review of projects varying from single-family homes to high-rise hospitals. He is Past-President of the Structural Engineers Association of Central California, an associate member of the seismic subcommittee of ASCE 7 Minimum Design Loads for Buildings and Other Structures, and a member of the PRG 320 CLT product standard committee. At WoodWorks, he provides project support and education to individuals designing wood buildings and oversees the development of technical educational content.

Attendees will qualify for 1 AIA/CES HSW LU, 1 PDH credit or 0.1 ICC credit (FBPE board-approved).

Certificates will be emailed to participants.


If you are attending the webcast as a group, each person in your group requiring a certificate of attendance must sign the Group Sign-in form.

  • Download and print ONE sign-in sheet for your group.
  • Return the completed sign-in form by email within 48 hours to .
  • WoodWorks will send each attendee a certificate of completion within 2 weeks.

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9 December 2020
12:00 pm - 1:00 pm
Event Category:

WoodWorks offers a wide range of in-person and online training opportunities, from Wood Design Symposiums that include concurrent seminars and a trade show, to half-day workshops, lunchtime seminars and webinars.