New course under development, coming in September 2023.

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1.2 CEUs / 12 PDHs 


Member $645 | Non-member $795


Dr. Marc L. Levitan, Ph.D, A.M.ASCE

Purpose & background

This course will begin with a brief overview of tornadoes, their climatology, and impacts. It will then explore recent developments for improved tornado hazard characterization, design methods, and codes and standards for buildings and structures to resist these hazards. The course will continue with its focus — review and application of the new chapter 32 provisions on Tornado Loads in the ASCE 7‐22 Standard. Participants will learn about the many and significant differences between wind loads and tornado loads, including design speeds, vertical velocity profiles, directionality factor, gust effect factor, enclosure classification, internal and external pressure coefficients, debris impact protection, velocity pressure and design pressure equations, load combinations, and more. 

This course works through examples for determination of tornado load factors, compute wind loads on an example building, then compute tornado loads for the same building, and finally determine the controlling load combinations considering both wind and tornado loads. The course will wrap up with a section on design requirements for tornado shelters. This will include discussion of key provisions of ICC 500‐2020 (the ICC/NSSA Standard for Design and Construction of Storm Shelters), along with code requirements for tornado shelters in the International Building Code, International Existing Building Code, and International Residential Code.

Learning outcomes

Upon completion of this course, you will be able to:

  • Summarize the scope and limitations of ASCE 7‐22 tornado load requirements.
  • Determine tornado speed for any geographic location, building/facility size, shape, and risk category.
  • Determine if design for tornado loads is required or not.
  • Calculate tornado velocity pressures and design pressures for various elements of a building or other structure.
  • Explain the differences between performance objectives for ASCE 7‐22 minimum tornado requirements, tornado shelters, and tornado safe rooms.

Who should attend?

  • Structural engineers
  • Architectural engineers
  • Risk managers
  • Building officials 
  • Federal facility engineers
  • State facility engineers
  • State DOTs
  • Building product manufacturers and associations (e.g., window and door manufacturers and associations)

Policies & system requirements