News Releases

Selecting The Right Round HSS

by Kimberley Olson, PE, FORSE Consulting, Technical Consultant to the Steel Tube Institute In a previous eNews article titled “A500 Versus A53: Different from the Inside Out”, the material and tolerance differences between these materials were pointed out. What wasn’t discussed are the numerous choices one has when it comes to available sizes. I have fielded Read more…

Composite Concrete Filled HSS: Design Considerations

by Jason Ericksen, SE, Technical Consultant to the Steel Tube Institute Kim Olson and Benjamin Kaan authored an eNews article titled “Practical Guidance for Concrete Filled HSS Columns” in September 2015.  The article discussed some of the benefits of filling HSS columns with concrete, including increased strength and a potential reduction in fire protection requirements.  As Read more…

Square and Rectangular HSS-to-HSS Moment Connections

by Jason McCormick1 1 Associate Professor, Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI, USA   Moment connections made of rectangular and square hollow structural sections (HSS) have received less consideration compared to HSS-to-HSS connections made up of axially loaded members (T-, Y-, cross-, and K-connections). The majority of static studies focusing on Read more…

HSS Splices

by Jeffrey A. Packer1 1Bahen/Tanenbaum Professor of Civil Engineering, University of Toronto, Ontario, Canada Identical, or similar-sized, HSS members frequently need to be joined end-to-end, or spliced, particularly in long-span construction and in tall columns. The familiar steel construction maxim of “weld in the shop, bolt in the field”, naturally applies. Bolted Splices Bolts Loaded Read more…

What Your Fabricator Wishes You Knew About HSS

As originally published in Modern Steel Construction April 2016. Designing with HSS is more economical when the right steps are taken. By Kim Olson, P.E. It is a common misperception that structures using hollow structural sections (HSS) are more expensive than those comprised primarily of open sections. One reason for this belief is that wide-flange Read more…

HSS KT-Connections

by Jeffrey A. Packer1 1 Bahen/Tanenbaum Professor of Civil Engineering, University of Toronto, Ontario, Canada HSS Warren trusses frequently have K-connections that are modified by the introduction of a third branch member, usually a vertical, to form a so-called KT-connection, as illustrated in Figure 1. The design of such connections is beyond the scope of Read more…

HSS – Saving You Money

By Kimberley Olson, PE, FORSE Consulting, Technical Consultant to the Steel Tube Institute There is nothing that gets my blood pressure up faster than an engineer telling me they don’t specify HSS because it is too expensive. That is like saying you still use a pencil and straight edge for your drawings because a computer is Read more…

Concrete-Filled Double-Skin Tubes

Concrete-Filled Double-­Skin Tubes by Jeffrey A. Packer, Bahen/Tanenbaum Professor of Civil Engineering, University of Toronto, Ontario, Canada Most structural engineers are very familiar with the concrete-­filled tube (CFT) concept, particularly for use as a composite column. The design of such compression members is well covered by AISC 360 Chapter I2.2 (AISC 2010). Small columns can Read more…

Round Branch-to-Rectangular Chord HSS Connections

by Jeffrey A. Packer1 1Bahen/Tanenbaum Professor of Civil Engineering, University of Toronto, Ontario, Canada AISC 360 gives design procedures for round branch-to-round chord HSS welded connections, and for rectangular branch-to-rectangular chord HSS welded connections (where rectangular includes square). These limit state checks are contained in Chapter K of the current Specification (AISC, 2010), in Chapters Read more…

Practical Guidance For Concrete Filled HSS Columns

By Kim Olson, PE, Technical Consultant to the Steel Tube Institute and Benjamin Kaan, PE, Associate, Thornton Tomasetti Filling Hollow Structural Section (HSS) columns with concrete is a means to achieve increased compression capacity through composite action. There are other benefits to a concrete-filled HSS column including increased fire endurance (research has shown up to 3 hours depending on Read more…

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