Structural engineers working with hollow structural sections (HSS) and connections for these members have a valuable new resource: AISC Steel Design Guide No. 24, Hollow Structural Section Connections by Jeffrey Packer, Ph.D., D.Sc., P. Eng.; Donald Sherman, Ph.D., P.E.; and Maura Lecce, Ph.D. This new design guide from the American Institute of Steel Construction addresses bolted and welded connections involving HSS, and provides examples of the application of design provisions for various configurations of HSS connections and the applicable limit states.