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CFS Framed Lateral Design

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CFS frame lateral force resisting systems code requirements were first introduced into the 1997 UBC and served as the basis for their inclusion into the AISI Lateral Design standards, AISI S213. There are now several good references and tools to help in the design of these systems. While somewhat similar to wood framed design, there are some differences for which understanding is necessary to ensure proper compliance and performance of these systems. Many of the questions regarding cold-formed steel frame seismic force-resisting systems regard the various system choices, which floor framing system should be used, overturning restraint options, wall stud bracing design, the use of the overstrength factor, Ωo, and anchorage of the overturning restraint system to concrete. This presentation will discuss these aspects of design and include various examples including from the CFSEI Shear Wall Design Guide.


  • Jeff Ellis, P.E., S.E.

    Jeff Ellis, P.E., S.E., is the Director of Codes & Compliance for Simpson Strong-Tie Company Inc., and has been a practicing engineer since 1991. Prior to joining Simpson Strong-Tie in 2000, he was a design engineer for small and large commercial, institutional, residential and forensic projects designing with wood, cold-formed steel, structural steel, masonry and concrete. He is a member of the SEAOC and SEAOSC Legislative Committees and the U.S. Resiliency Council board. He has served as SEAOSC president, SEAOC secretary, California Building Officials (CALBO) Structural Safety Committee member, ICC-ES board manager, AISI COFS Lateral Design Subcommittee chair, and Cold-Formed Steel Engineers Institute (CFSEI) president. Over the years, he’s authored and contributed to several articles and design guides related to codes, compliance, and design.

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August 10, 2017
Thu 12:00 PM CDT

Duration 1H 30M

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