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STEEL DESIGN GUIDE-Modification of Exsiting Welded Steel moment Frame
http://rapidshare.com/files/50470478/Design_Guide_12_Modification_of_Existing_Welded_Steel_Moment_Frame_Connections_for_Seismic_Resistanc
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Designing with Structural STEEL- A Guide for Architects, 2nd edition, 2002...