21St International Specialty Conference on Cold-Formed Steel Structures, Date: 24 October 2012 through 25 October 2012, Location: St. Louis, MO, Patrocinadores: American Iron and Steel Institute (AISI);Cold-Formed Steel Engineers Institute (CFSEI);Metal Building Manufacturers Association (MBMA);Rack Manufacturers Institute (RMI);Ridg-U-Rak, Inc.