Louden® Product Showcase Gimbal Suspension System The Louden gimbal suspension system is one of the most important component improvements in the history of the monorail industry. The system aids in reducing extreme bending stresses that can cause fatigue failure of old style hanger rods. The key to the effectiveness of the system is the multiplane washers at both ends of the hanger rod that give a gimbal effect permitting free movement of ±6° in any direction without bending the rod. The illustration shown depicts typical hanger rod assemblies. Note in assembly A how the gimbal washers permit free action in any direction within the ±6° limits. In assemblies B and C, the rod hangers encounter significant bending stresses that could cause fatigue failure. Hanger Rod Components High Tensile Steel Hanger Rods Made from high tensile steel, these rods come with 6" of Unified National Fine threads. Using the minor diameter area method, the 3/4" rod is rated at 8,500+ lbs. and the 1 1/8" rod at 20,000+ lbs. Rods are furnished with plastic protected threads for shipping and factory assembled lower nut secured by a roll pin.