The American Institute of Steel Construction, often abbreviated AISC, is a not-for-profit technical institute and trade association for the use of structural steel in the construction industry of the United States.


The American Gear Manufacturers Association is a voluntary association of companies, consultants, and academicians with a direct interest in the design, manufacture, and application of gears, couplings and related power transmission components and equipment.


The American Association of State Highway and Transportation Officials is a standards setting body which publishes specifications, test protocols and guidelines which are used in highway design and construction throughout the United States.


The National Hydropower Association (NHA) is a nonprofit national association dedicated exclusively to promoting the growth of clean, affordable hydropower, America’s leading renewable resource.


The National Steel Bridge Alliance (NSBA), a division of the American Institute of Steel Construction (AISC) is a national, not-for-profit organization dedicated to the advancement of steel bridge design and construction.