Abstarct: Following the Northridge earthquake of 1994, a significant number of steel moment resisting structural systems were damaged. Several studies have been conducted to improve the seismic performance of steel structures and specially their beam to column connections. One of the proposed connections for special moment resisting frxames included AISC-358 is Kaiser Bolted Bracket (KBB) moment connection. In a Kaiser bolted bracket moment connection, a cast high strength steel bracket is fastened to each beam flange and bolted to the column flange. In this study the seismic behavior of Kaiser bolted bracket moment connections with Iranian steel sections has been investigated. Also three strategies has been examined for improve the seismic performance of KBB connections. The results show that some of the Iranian steel sections were not admissible to use with KBB connections. Between the examined strategies for improving the performance of KBB connections, the strategy of adding additional continuity plates is more useful.