Chapter 9 and Appendix A

December 30, 2009
Publication: Supplement No. 1 to AISC/ANSI 358-05 Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications
Author(s): Adan, Scott M.

Abstract: In a Kaiser bolted bracket (KBB) moment connection, a cast high-strength steel bracket is fastened to each beam flange and bolted to the column flange as shown in Figure 9.1. The bracket attachment to the beam flange is permitted to be either welded (Figure 9.1a) or bolted (Figure 9.1b). If welded to the beam flange, the five W-series bracket configurations available are shown in Figure 9.2. If bolted to the beam flange, the two B-series bracket configurations available are shown in Figure 9.3. The bracket configuration is proportioned to develop the probable maximum moment capacity of the connected beam. Yielding and plastic hinge formation are intended to occur primarily in the beam at the end of the bracket away from the column face.