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Supplement No. 1 to ANSI/AISC 358-05 Now Available for Free Download

August 4, 2009 from American Institute of Steel Construction

(Chicago, IL) – A valuable resource that provides a greater variety of prequalified moment connections options for special moment frames (SMF) and intermediate moment frames (IMF) is now available for designers of steel structures in high seismic regions. AISC’s Supplement No. 1 to Prequalified Connections for Special and Intermediate Steel Moments Frames for Seismic Applications (ANSI/AISC 358-05s1) is now available for free download at www.aisc.org/freepubs.

ANSI/AISC 358-05s1 is a supplement to the 2005 AISC standard, Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications. The document modifies an existing prequalified moment connection and adds three new prequalified moment connections.

When it was first introduced in 2005, AISC Prequalified Connections covered three connection types: reduced beam section (RBS) moment connections, bolted unstiffened extended end-plate (BUEEP) moment connections, and bolted stiffened extended end-plate (BSEEP) moment connections. A limitation was necessary at that time on both of the prequalified extended end-plate moment connections: they could not be used with composite concrete structural slabs in SMF.

Supplement No. 1 to ANSI/AISC 358-05 provides three more prequalified connection types and eliminates the prohibition of composite slabs for extended end-plate moment connections in SMF. Supplement No. 1 also adds prequalified details for bolted flange plate (BFP) moment connections, welded unreinforced flange - welded web (WUF-W) moment connections, and Kaiser bolted bracket (KBB) moment connections.

ANSI/AISC 358-05s1 is available for free download along with ANSI/AISC 358-05, ANSI/AISC341-05, and ANSI/AISC 360-05 at www.aisc.org/epubs.   


 For more information contact:
Tasha O'Berski
Communications Department
(312) 670-5439
[email protected]

American Institute of Steel Construction
The American Institute of Steel Construction, headquartered in Chicago, is a not-for-profit technical institute and trade association established in 1921 to serve the structural steel design community and construction industry. AISC’s mission is to make structural steel the material of choice by being the leader in structural steel-related technical and market-building activities, including: specification and code development, research, education, technical assistance, quality certification, standardization, and market development. AISC has a long tradition of service to the steel construction industry of providing timely and reliable information. 

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