No special tools needed with breakway bolt option. Simply tighten the bolt until the head shears off.
Design allows for installation on existing structures
Cast Iron damper weights and Aluminum clamping body
AFL Highway Truss Dampers offer the most practical and economical solution for vibration problems normally encountered in highway sign trusses. The AFL 1708-17.1 damper, weighing 31 lbs. (14.06 kg), is the size most commonly used for highway truss applications. A single damper located at the mid-point of the truss will provide vibration protection for lengths between 60 and 140ft (18.3-42.7m). Special consideration should be given to longer spans or cantilever applications.