National Maintenance Agreement Policy Committee
NEA-The Association of Union Contractors
Building Trades Employers Association
National Association of Construction Boiler Employers
Boilermakers Association of Greater New York

American Society of Safety Engineers
National Institute of Occupational Safety & Health
National Safety Council
The Center to Protect Workers' Rights
The Construction Safety Council

American National Standards Institute
American Society of Mechanical Engineers
American Welding Society
Common Arc Corporation
National Board of Boiler and Pressure Vessel Inspectors
American Petroleum Institute

AFL-CIO Building and Construction Trades Dept.
International Association of Bridge, Structural & Ornamental Iron Workers
International Association of Heat and Frost Insulators and Asbestos Workers
International Brotherhood of Boilermakers
International Brotherhood of Electrical Workers
International Brotherhood of Painters & Allied Trades
International Brotherhood of Teamsters
International Union of Bricklayers & Allied Craftsmen
International Union of Elevator Constructors
International Union of Operating Engineers
Laborers International Union of North America
Operative Plasterers' and Cement Masons International Association
Sheet Metal Workers International Association
Steamfitters Local 638
United Association of Journeymen & Apprentices at the Plumbing and Pipe Fitting Industry
United Brotherhood of Carpenters and Joiners
United Union of Roofers, Waterproofers & Allied Workers