From the Engineering News-Record comes an article about the National Stand-Down. From the article:

He also said OSHA was teaming with a long list of construction organizations, including the Associated General Contractors of America, Associated Builders and Contractors and National Home Builders Association.

Among other partners are labor unions, including the carpenters, laborers, electrical workers, and ironworkers. Also taking part are the union-affiliated CPWR-The Center for Construction Research and Training, as well as the National Institute of Occupational Safety and Health, state OSHAs and others.

To read more about the Stand-Down efforts, check out the article.