Matthew Troemner

Researcher | Innovator

Journal Articles


Notes on the AISC 360-16 Provisions for Slender Compression Elements in Compression Members


AISC Engineering Journal


Geschwindner, Louis F.; Troemner, Matthew


2016, Vol. 53, No. 3 pp. 137-146


Compression member strength is controlled by the limit states of flexural buckling, torsional buckling, and flexural-torsional buckling, as applicable. These compression members may buckle globally or locally, depending on the overall column slenderness and the local plate element slenderness for the plates that make up the shape. If any of the plate elements will buckle at a stress lower than that which would cause the column to buckle globally, the local buckling of the plate will control the overall column strength. When this occurs, the column is said to be composed of slender elements.

This paper will briefly discuss past specification provisions for slender element compression members and introduce the new provisions in the 2016 AISC Specification. It will present a simplification that reduces the number of constants that must be used and will present the specification requirements in an alternate format. Because the 2016 requirements result in different strengths than the 2010 requirements, figures are provided to illustrate the overall impact of these changes on column strength. 

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Magazine Articles


Specwise: What's New in the Spec?


Modern Steel Construction


Baer, Sam; Troemner, Matthew


2016, Vol. 56, No. 12, pp. 17-22


AISC is set to release the 2016 edition of the Specification for Structural Steel Buildings (ANSI/AISC 360-16) in the near future.

Changes from the 2010 edition reflect the Committee on Specifications’ desire to implement only essential changes that reflect new research, provide for more efficient designs or broaden its scope. Many of these changes were technical in nature, though edits were also made that focused on improving usability, transparency and editorial content.

The following is a brief overview of the most significant changes, some of which have the potential to substantially affect design procedures. A complete list of differences between the 2010 and 2016 AISC Specification will soon be available as a free download at

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Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications


ANSI/AISC 358-16 American National Standard

approval board

Connection Prequalification Review Panel


Arber, L., Carter, C., Duncan, C., Malley, J., Miller, D., Pryor, S., Saunders, C., Troemner, M.


ANSI/AISC 358-16, Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications, was developed using a consensus process in concert with the Specification for Structural Steel Buildings (ANSI/AISC 360-16) and Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-16). ANSI/AISC 358-16 is incorporated by reference into the Seismic Provisions.

This Standard specifies design, detailing, fabrication and quality criteria for connections that are prequalified in accordance with the AISC Seismic Provisions  for Structural Steel Buildings (herein referred to as the AISC Seismic Provisions) for use with special moment frames (SMF) and intermediate moment frames (IMF). The connections contained in this Standard are prequalified to meet the requirements in the AISC Seismic Provisions only when designed and constructed in accordance with the requirements of this Standard. Nothing in this Standard shall preclude the use of connection types contained herein outside the indicated limitations, nor the use of other connection types, when satisfactory evidence of qualification in accordance with the AISC Seismic Provisions is presented to the authority having jurisdiction. 

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Other Publication Contributions



Consulting CAD Drafter

Geschwindner, Louis F., et al. Unified Design of Steel Structures. Providence Engineering Corp, 2017.