Since the release of the new 2005 AISC Specification and the 13th Edition AISC Manual of Steel Construction the tools available to design with HSS are at your fingertips! With the ability to design HSS-to-HSS moment connections through the new section K3 of the specification, HSS can be utilized in more applications than ever before. This paper will expolore HSS connection design in truss connections and moment connections along with addressing the specifics of how Chapter K of the specification is organized, including the accompanying design examples that explain the design of HSS connections. Sources for HSS connection design information beyond AISC will be reviewed, as well as implications from recent HSS connection research work including connections with dynamic loading such as seismic applications. Investigations on cast steel connections in seismic applications are also addressed in addition to standard HSS fabricated connections. These developments in the design and fabrication of HSS connections will only continue to evolve the HSS construction industry for applications that were once thought unfeasible.
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