Reduce machinery downtime, inventory losses and work-related injuries with Lyon’s Protective Guard Rail. Heavy duty columns and rails form protective barriers for in-plant work areas, office walls, doorways, building passages and driveways. *Pre-Engineered Single Rail Sections For basic systems, simply start with the appropriate Starter rail, then add Add-Ons as necessary. All rails are 12" high, with 18" high columns. *Column Posts Use single columns for single rail applications, dual for two rails, and triple for full 42" high protection.