STD401-2 – AWC's 2008 Special Design Provisions for Wind and Seismic ASD/LRFD – Part 2: Diaphragm Deflection Calculations

YouTube SelfStudy Subjects

Per the International Building Code (IBC), structures using wood shear walls and diaphragms to resist wind, seismic and other lateral loads shall be designed and constructed in accordance with AWC's Special Design Provisions for Wind and Seismic (SDPWS). Calculation of wood-frame diaphragm deflection should account for bending and shear deflections, fastener deformation, chord splice slip, and other contributing sources of deflections. The 2008 SDPWS incorporates both a 3-term and 4-term deflection equation that accounts for these variables. This course will provide an overview and comparison of the 3-term and 4-term deflection equations. Additionally, an example showing calculation of mid-span deflection of a blocked wood structural panel diaphragm will be presented.

Learning Objectives: 

  1. Be able to calculate wood-frame diaphragm deflection using the 2008 SDPWS.
  2. Be able to compare the difference between the 3-term and 4-term deflection equation in the 2008 SDPWS.
  3. Be able to analyze individual components of the deflection equations to determine their magnitude of impact on total deflection.
  4. Be able to utilize the example deflection calculation in future design work as a model for their own calculations.
  5. NCSEA does not warrant that a program complies with the continuing education requirements in all jurisdictions.
Equivalencies: 1.0 Hours of Instruction = 0.1 Continuing Education Units (CEU) = 1 Professional Development Hours (PDH) = 1 Learning Units (LU)

See also DES412-1 – Seismic-Resistive Design of Wood Buildings.


Download a Full-Color PDF

Download a Black & White PDF

Watch a Video

View Webinar FAQs

Take an eCourse

Schedule a Live Presentation