8-Bar - Original 3 Conductor System. Web Mount Bracket - 9 inches W/ 3 Hangers (Steel, 21600) Pre-Installed. Zinc Plated Steel Finish. Dim X = 2.25 Inches, Dim Y = 15.75 Inches. Mounts to Vertical Web of Beam. Bracket is 2.5 Inches Wide by 3/8 Inches Thick. All Holes to Accept Hangers are 3 Inches On-Center and 0.56 Inches Diameter (to Accept 3/8 Inch diameter hanger Bolts). Common Applications: Mainline / Top Running Applications, Web Mounted Bottom Entry Systems.