EASTERN BRIDGE, LLC; Isaacson Structural Steel, Inc.; Vanguard Manufacturing, Inc.; Monadnock Forest Products, Inc., Plaintiffs, Appellants, v. Elaine L. CHAO, Secretary of Labor, United States Department of Labor; and John L. Henshaw, Assistant Secretary of Labor for Occupational Safety and Health Administration, Defendants, Appellees. No. 02-1908.United States Court of Appeals, First Circuit.Heard December 6, 2002. […]