Aegis

http://www.aegis.com
Metal Framing, LLC

Mitek Industries, Inc.

http://www.mitekinc.com/core.asp
'Ultra-Span' Truss Systems

Light Gauge Steel Engineers Association

http://www.lgsea.com
Engineering Trade Association

Simpson Strong-Tie Company, Inc.

http://www.strongtie.com
Connection Systems

Underwriters Laboratories

http://www.ul.com
Independent Testing Laboratories

Steel Stud Manufacturers Association

http://www.ssma.com

ClarkDietrich Building Systems

https://www.clarkdietrich.com