This specification describes a crash attenuator, folding cartridge type, for truck mounting or trailer, used for protecting personnel, equipment and the general public from injury and damage caused when errant vehicles crash into equipment used in highway operations. A unit furnished to this specification shall meet or exceed the following requirements. 3.1.1. Length Stored: Min. 2 ft., Max. 8 ft. 3.1.2. Length Deployed: Min. 8 ft., Max. 16 ft. 3.1.3. Width: Min. 6 ft., Max. 9 ft. 3.1.4. Height Stored: Min. 8 ft., Max. 12.5 ft. 3.1.5. Height Deployed: Min. 3 ft, Max. 5 ft. 3.2. Speed Limit: Max 30 mph deployed. 3.3. Material: Aluminum tubing, plastic cartridges, and steel brackets and fasteners. 3.4. Weight Max 2,600 lbs.