Chicago — The first supplement to the 2016 AISC standard, Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (AISC 358-16), is available for public review until October 6, 2017. This document adds a new prequalified connection — the SSDA Slotted Web moment connection — and expands the scope of prequalification for the SidePlate moment connection in Chapter 11.

The standard supplement and review form are available for download at Hard copies are also available (for a $35 nominal charge) by contacting AISC’s Janet Cummins at 312.670.5411 or The current 358-16 standard is available for free downloading at, if needed for reference when reviewing the public review document. Submit comments using the form provided online to AISC’s Margaret Matthew, at, by October 6 for consideration.