HSS Insider – July 2025 – HSS Moment Connections – Transverse Flange Plate Example

July 2025 | Issue #36

In this issue of the HSS Insider, we focus on practical strategies for designing moment connections between wide-flange beams and HSS columns. Explore a full design example using transverse flange plates and learn how to streamline weld design with STI’s Effective Weld Calculator. And, don’t miss the upcoming free August webinar.

HSS Moment Connections Design Examples: Transverse Flange Plates

This comprehensive design example walks through a moment connection between wide flange beams and an HSS column using flange plates. Follow the step-by-step design process using AISC 360-22 and the 16th Edition Manual, including checks for HSS-specific limit states and the impact of the Qf factor. The example also highlights tools like STI’s Limit State Tables, HSS Connex and the Effective Weld Length Calculator to support efficient connection design.

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Weld Calculations Made Simple: Check HSS Welds Using STI’s Effective Weld Length Calculator

Simplify your HSS connection design with the Steel Tube Institute’s Effective Weld Length Calculator. Quickly determine weld capacity for transverse plate-to-HSS and HSS-to-HSS connections per AISC 360-22 Table K5.1—saving time on complex calculations. See it in action with real-world examples.

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Webinars

Free Webinar | WF Beam to HSS Column Moment Connections

Join us on August 27 for a free webinar focused on moment connections between wide flange beams and HSS columns. We will take a deep dive into the common flange-plated moment connection, covering key limit states, performing effective weld length calculations, and comparing traditional and FEA design methods, complete with a full-depth example while also touching on directly welded, collared and end plate moment connections. Participants can earn 1.0 PDH upon completion.

This live webinar has already been presented. Click below to watch this and other HSS recorded webinars on demand.

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Mastering HSS Connections – A Connection Design Webinar Series

STI’s comprehensive multi-session series on HSS connection design offers structural engineers a deep dive into both fundamental concepts and complex connection scenarios. Each session delivers practical, technical insights to help you navigate a wide range of design challenges with confidence.

* Flexible Format – Two live sessions remain in 2025. Additionally, access six on-demand webinars at your own pace. Choose the full series, live sessions only, or individual topics that fit your needs.

* Comprehensive Content – Each webinar stands alone, covering everything from fundamental HSS limit states to more advanced connection design. Watch in any order to match your learning goals.

* Earn Continuing Education Credits – Earn up to 8 PDH credits (1 PDH per webinar).

Exclusive Member Discounts – HSS Professional Members access all live webinars free and can access the full 8 session series, including the recorded sessions with PDH quizzes for $150 (30% off). Click here to become an HSS Professional Member. Non-members pay $305 for the full series, or $95 for the live sessions. 

*Note: Pricing is based on 2 live webinars and six Webinars On Demand.

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Related Resources

Wide-Flange Beam to HSS Column Moment Connections

This article provides practical guidance for a variety of moment connections between wide-flange beams and HSS columns – from directly welded to exterior diaphragm plate connections, and more. Explore moment connection types, key structural considerations, and example applications to inform your next project.

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HSS Reference Guide No. 2: HSS Moment Connections

Explore STI’s HSS Moment Connection Reference Guide, to assist you in the design of Beam-to-HSS column and HSS-to-HSS moment connections. The guide features a comprehensive collection of articles, design guides with examples, webinar recordings, and more.

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Understanding Local Yielding Due to Uneven Load Distribution

Rectangular HSS connections can efficiently handle uneven load distribution – when designed with local yielding in mind. This article breaks down the relevant limit states and provides clear guidance on design approaches for each applicable connection type.

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2025 HSS Summit

Registration is Open – Sessions Announced for the 2025 HSS Summit!

Join the Steel Tube Institute’s 2025 HSS Summit, October 28–29 in the Dallas/Fort Worth area. Designed for structural engineers, fabricators, and service centers, this focused event offers expert-led sessions and roundtable discussions on HSS topics including material availability, connection detailing, design and fabrication, sustainability, and more—all while earning up to 10 PDH credits.

• Continuing Education: Learn about material availability, connection detailing, design and fabrication, software, manufacturing equipment, and sustainability. Eligible for up to 10 PDH credits. Click here to view agenda.
• Roundtable & Panel Discussions: Exchange ideas with industry leaders and peers in a collaborative setting.
• Breakout Sessions: Join tailored discussions that align with your interests and role in the industry.
• Networking Opportunities: Build connections during the reception and dinner on October 28th.

Spots are limited, so we encourage you to register early to secure your place. HSS Professional Members receive a 20% discount.

The Summit has already occurred. Click below to view the agenda.

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