Radiused Cold-Formed Steel Structure Design

Earn 1 PDH/1 LU|HSW

This presentation explores the challenges of designing radiused cold-formed steel (CFS) members from a practical engineering perspective. While traditionally used in straight applications, radiused CFS members offer a versatile, lightweight, and cost-effective option for radiused structures, but require careful analysis to ensure adequate strength and performance.

The session will focus on the following key areas:

1. Curving Cold-Formed Steel Members: Techniques such as stretch forming, crimping, and tabbed assemblies are required to curve CFS members, altering their strength and stiffness compared to standard designs. Presenters will discuss each method’s benefits and limitations in various scenarios.
2. Evaluating Projects for Radiused CFS Applications: Radiused layouts are not always practical or cost-effective. This presentation will explore criteria like architectural intent, load paths, framing orientation, and fabrication constraints to assess when radiused CFS members are a good fit. Examples of successful projects will provide a decision- making framework.
3. Capacity and Torsional Behavior: Understanding how radiused CFS members behave under bending and torsion is key to ensuring performance. While torsion can often be avoided, in some cases it is the most efficient option. This presentation will look at how curvature impacts forces, deflection, and member design, focusing on built-up sections.
4. Delegating Design Responsibilities: Designing radiused members involves collaboration among engineers, delegated designers, and fabricators. The presenters will address how to delegate radiused framing by establishing performance criteria and minimum properties to meet your design intent, considering how the manufacturing processes can affect strength and stiffness.
5. Connection Detailing for Curved CFS Members: Detailing connections for curved members poses unique challenges, often exceeding standard detailing practices. This presentation will discuss strategies for handling these non-standard loads and restraints, ensuring connection integrity.
6. Design Examples: A walk-through of the design process for a radiused CFS member will conclude the session, covering manufacturer capacity adjustments, torsional design, and connection detailing.

This presentation will provide practical guidance for engineers working with radiused CFS members, offering insights into design, evaluation, and detailing techniques.

Josh Garton, P.E., S.E.
McClure

Josh is a Project Manager for McClure. He is a licensed structural engineer with 10 years of experience. His design expertise includes multi-story load-bearing cold-formed steel (CFS) structures, industrial structural steel components, non-bearing cold-formed steel systems in both panelized and stick-framed construction, and building cladding elements. Josh also has a strong background in radiused, and uniquely shaped structures framed with CFS, developing out-of-the-box solutions for challenges in 3D spaces where traditional details are not effective.

As a licensed structural engineer in 10 states, Josh oversees a team of 14 design professionals.  He has also led the development of custom cold-formed steel connection design software used by McClure’s engineers.  Josh has presented with the Cold-Formed Steel Engineers Institute (CFSEI) and through various online webinars.

Daniel Linneman, P.E., S.E.
McClure

Daniel is a licensed Structural Engineer at McClure with nearly six years of experience specializing in multi-story load-bearing cold-formed steel (CFS) structures. As the lead designer on numerous projects, he has developed innovative solutions to complex structural challenges. Daniel’s expertise extends beyond cold-formed steel, with significant experience in wood design and a solid background in post-tensioned concrete systems, enhancing his versatility across a wide range of project types. In addition to his design work, Daniel is highly skilled in creating advanced engineering tools, having developed complex Excel spreadsheets to streamline calculations and workflows.

He is licensed as a Professional Engineer in four states, including California, he combines technical proficiency with practical problem-solving to deliver exceptional results.

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