Webinar on Design Considerations for Cold-Formed Steel Light Frame Diaphragms

Continuing Education Credits Available – 1.5 PDH Credits

Cold-formed steel structural members are commonly subjected to torsion. The torsional behavior of open cross-sections can be complex, involving both warping torsion and St. Venant torsion. Most structural engineering curriculums do not teach this combined torsion response, leaving many engineers with limited ability to properly design for torsion. To complicate matters, most structural analysis software does not fully capture the torsional behavior for cold-formed steel members.

This webinar will review some torsion fundamentals and explain torsion distribution using analogies to flexural behavior familiar to structural engineers. The similarity to flexure will be demonstrated using the CFS® software. The AISI design provisions for combined bending and torsion will be reviewed, and the application of these provisions will be evaluated with several design examples.

Presenter: Bob Glauz, P.E., MSCE

Bob Glauz is the author of the CFS® software used internationally for cold-formed steel design. He is a member of the American Iron and Steel Institute (AISI) Committee on Specifications and chairs the AISI Committee on Member Design. He is also a member of the ASCE/SEI Standards Committee on Stainless Steel Cold-Formed Sections, the Structural Stability Research Council (SSRC) and the SSRC Task Group on Stability of Steel Members. Bob has authored several technical articles on lateral-torsional, flexural-torsional, and distortional buckling of cold-formed steel members.

In order to receive credit for this course, you must complete the quiz at the end and pass with at least 80% for a certificate to be generated automatically.

Last year alone the CFSEI Hotline responded to over 4,800 inquires. These inquires cover the gamut of cold-formed steel applications. Because these questions often are beyond the scope of a design standard engineering judgement is needed.

Roger will review a few of the Hotline topics with a focus on employing engineering principals to solve everyday design considerations. Topics to be addressed are …

• Should loose straps be a concern?
• Does gypsum between the steel plies impact the screw connection strength?
• For the single-side strap brace, what are the implications for the design of the boundary post?
• How does one design a shear wall for force transfer around openings?
• What wind loading drift limits are appropriate for mid-rise structures?

Presenter: Jeffrey Klaiman, P.E., ADTEK Engineers, Inc.
Jeff has over 20 years of experience in the construction industry. His responsibilities include building maintenance and engineering; on-site engineering for a concrete contractor; Manager of Technical Services and Versa-Truss Product Manager for Dale/Incor (national manufacturer of cold-formed steel framing products and systems), participation on the American Iron and Steel Institute’s Committee on Specifications for the Design of CFS Structural Members and Committee on Framing Standards; a member of CFSEI for more than 10 years; ASTM International and the SFA. Mr. Klaiman serves as chairman of the Standard Practices Subcommittee of the AISI Committee on Framing Standards and is also the president of MASFA. He is a past president of CFSEI. In his position at ADTEK Engineers, Inc. as Principal in Charge of Specialty Engineering, Mr. Klaiman oversees the design and coordination of all cold-formed steel design documents. He also manages in-house staff in three offices for CFS framing design, develops project schedules, and coordinates quality control reviews with project managers on his team. Mr. Klaiman holds a bachelor’s degree in Civil Engineering from the University of Michigan, and an MBA from Eastern Michigan University.

Fire Resistance of Wall, Floor & Ceiling Systems

The presentation will begin with a review of the standards used to test both wall and floor/ceiling assemblies. Special attention will be given to factors that affect the design of systems with cold-formed steel, and some comparisons will be made to wood-framed systems. Several UL-certified fire designs will be described that showcase how structural factors can affect fire design.

Roger will review a few of the Hotline topics with a focus on employing engineering principals to solve everyday design considerations.

Presenter: Kyle Flondor, United States Gypsum Corporation.
 
Kyle Flonder is a Senior Researcher, Building Science (Fire) at United States Gypsum Corporation. He received his Bachelor of Science degree in Industrial Engineering from the University of Iowa. From 2006-2017, he was project engineer in UL’s Fire Protection Division, responsible for the evaluation and certification of fire containment and building fenestration products. He moved to USG in 2017 to support the evaluation of USG products and systems through testing and analysis. He is one of the principal USG engineers who work with accredited testing agencies, and he assists most Authorities Having Jurisdiction with large and small projects involving USG products and fire designs.

This presentation is designed to clarify the intent of the language in the code-referenced publications AISI S100 and ASCE/SEI 7-16 as it relates to PAFs used to attach track to concrete, in SDC A-C and SDC E-F. The presentation will also provide practical guidance to the designer regarding which design values should be used and where those values can be obtained. Additional practical recommendations will be provided regarding the specification of various types of PAFs and their embedment depths into the concrete.

Presenter: Christopher Gill, Hilti Inc.

Chris Gill is the Technical Services Manager for Direct Fastening at Hilti in Plano, Texas. He is responsible for the department which performs product testing, generates technical data, publishes technical documents, and obtains approvals and listings for power-actuated and screw-fastening products. He is a member of the American Iron and Steel Institute (AISI) Committee on Specifications, and a voting member of its subcommittees responsible for connections and joints, and diaphragm design. Chris recently participated in the 2020 NEHRP Provisions Update Committee, Issue Team 9, which addressed alternate provisions for seismic diaphragm design, and recommended new provisions for incorporation into ASCE/SEI 7. He has also contributed to the soon-to-be published ASCE/ SEI Design Guide “Cold-Formed Steel Connections to Other Materials.”

Chris has a total of 33 years working in the fastening and anchoring industry. He previously worked as a field engineer, field engineering manager, trade manager and product manager with Hilti. He holds a B.S. degree in Engineering from Brown University and an M.S. degree in Engineering and Technology Management from Oklahoma State University.