DES413-3 – Calculating ASD Shear Wall Capacities per 2015 SDPWS Using the Equal Deflection Approach

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AWC's 2015 Special Design Provisions for Wind and Seismic (SDPWS) is referenced in the 2015 International Building Code (IBC) for design of structures using wood shear walls and diaphragms to resist wind and seismic lateral loads. Provisions in the SDPWS contain the equal deflection requirement for distribution of shear to shear walls in a line which can be met either by calculation of shear wall deflections or use of reduced design unit shear strength. This course will discuss the 2015 SDPWS provisions for distributing shear using the deflection calculation approach and effects on calculated design shear capacity of a shear wall line. It will be compared to the adjustment factor approach which permits distribution of shear in proportion to strength where reduced strengths are determined by use of the 2bs/h factor for wood structural panels. Allowable stress design (ASD) examples, excerpted from the 2015 SDPWS Commentary are included.

Level: Advanced
Primary Audience: Engineers, Code Officials

Learning Objectives: 

  1. Be able to understand the 2015 SDPWS provisions for distribution of shear to shear walls in a line
  2. Be familiar with the 2015 SDPWS provisions for shear distribution based on either i) deflection calculation, or ii) use of reduced shear strengths in accordance with the 2bs/h factor for wood structural panels
  3. Be able to understand how distribution of shear provisions affects design shear capacity of shear walls in a line
  4. Be familiar with new strength reductions for shear walls based on shear wall aspect ratio

Equivalencies: 1.0 Hours of Instruction = 0.1 Continuing Education Units (CEU) = 1 Learning Units (LU)
This course is no longer registered with NCSEA Diamond Review for continuing professional education. As such, it is not eligible for NCSEA continuing education credit.


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