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PREFACE

Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. A patent holder or patent applicant has filed a statement of assurance that it will grant licenses under these rights without compensation or under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair discrimination to applicants desiring to obtain such licenses. AISC is not responsible for identifying Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity or scope of Patents Claims, or for determining whether any licensing terms or conditions are reasonable or nondiscriminatory. The patent holder has filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license, and the statement may be obtained from the standards developer.

This supplement to the 2005 standard, Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications, modifies an existing prequalified moment connection and adds three new prequalified moment connections. The principal additions contained in the supplement may be summarized as follows:

• Bolted unstiffened fened extended end plate (BUEEP) moment connections and bolted stiffened extended end plate (BSEEP) moment connections have been prequalified for SMFs with concrete structural slabs, subject to the requirements of Chapter 6.

• Bolted flange plate (BFP) moment connections are prequalified per Chapter 7.

• Welded unreinforced flange-welded web (WUF-W) moment connections are prequalified per Chapter 8.

• Kaiser bolted bracket (KBB) moment connections are prequalified per Chapter 9.