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American Wood Council

DES430 – Seismic Design of Large Wood Panelized Roof Diaphragms in Heavy Wall Buildings


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This presentation will focus on the engineered design of large wood panelized roof diaphragms in tilt-up concrete and masonry wall buildings, with focus on design requirements for strength, stiffness, and proper development and resistance of wall anchorage forces. A historical perspective of how past seismic experience with this building type has influenced today's building code provides a good perspective for the participant to apply the current provisions of ASCE 7-10, 2012 NDS and 2008 SDPWS. Various design illustrations and examples of high load wood structural panel diaphragms, wall anchorage, subdiaphragms, continuity cross ties, chords and collectors will be shown.

This webinar is intended for practicing engineers and undergraduate and graduate engineering students. After attending, the participant should be able to:

  1. Identify the characteristics of a panelized wood roof diaphragm.
  2. Apply requirements for wall anchorage forces including proper detailing for distribution of these forces into the diaphragm.
  3. Utilize subdiaphragms as a tool to create an efficient load path for wall anchorage forces.
  4. Design wood diaphragms and their chords and collectors for seismic forces.

Equivalencies: 2.0 Hours of Instruction = 0.2 Continuing Education Units (CEU) = 2 Professional Development Hours (PDH)=2 Learning Units (LU)

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