An Overview of the Changes to AISC 341—Seismic Provisions for Structural Steel Buildings

American Institute of Steel Construction (AISC) document 360, Specification for Structural Steel Buildings, is the basic reference for the design, fabrication, and erection of structural steel buildings and other “building-like” steel structures in the United States. When applied in conjunction with AISC 360, AISC 341, Seismic Provisions for Structural Steel Buildings, is the standard reference document for the seismic design of steel structures throughout the United States. Balloting is complete to update AISC 341-16 that will be incorporated with ASCE 7-16 and AISC 360-16 into the 2018 International Building Code. The document will have significant technical modifications including new material specifications, use of steel braced diaphragms, new column splice details, requirements for SCBF gusset plate welds, and application of demands on columns that participate in intersecting frames. In addition, significant new provisions related to the seismic design of multi-tier braced frames will be provided. A new composite shear wall system has also been developed. This paper will summarize the changes proposed for AISC 341-16.