AWS - American Welding Society - http://www.aws.org/

ANSI - American National Standards Institute - http://www.ansi.org

ASNT - American Society for Nondestructive Testing - http://www.asnt.org

 AISC - American Institute of Steel Construction - http://www.aisc.org

ASME - American Society Of Mechanical Engineers -  http://www.asme.org/

ASTM International - American Society for Testing and Materials - http://www.astm.org/

AASHTO - The American Association of State Highway and Transportation Officials - http://www.transportation.org/

AWWA – American Water Works Association - http://www.awwa.org/

API - American Petroleum Institute - http://api-ep.api.org/

ICC - International Code Council - http://www.iccsafe.org/

 OSHA - Occupational Safety & Health Administration - http://www.osha.gov/