SS180® M

The SS180® M is a truck mounted attenuator for use on stationary or moving shadow or support vehicles. It is tested to MASH Test Level 3. The unit is comprised of two lightweight aluminum cartridges contained in a potentially reusable steel support frame, and a 180° tilt feature which folds at the center to stack the two cartridge sections on top of each other.* The SS180® M is designed to help absorb rear-end impacts at speeds up to 62 mph (100 km/h) when impacted within MASH crash test standards.

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  • Short height while in storage mode ideal for garage storage and low overpasses.
  • Replaceable, energy absorbing cartridges.
  • Potentially reusable steel support frame.*
  • Designed to help minimize damage from low-speed nuisance hits up to 6 mph (10 km/h).


*After an impact, the product must be inspected and evaluated per the direction of the specifying roadway authority. The ultimate decision on reusability rests with the specifying roadway authority and/or state DOT.

Assembly & Maintenance

  • Multiple attachment options for standard trucks.
  • Attaches to existing Safe-Stop TMA® mounts for standard and tailgate operations.





  • 2,033 lbs. (922 kg) Weight
  • 7’ 9″ (2.35 m) Length Folded
  • 14’ 7″ (4.46 m) Length Deployed
  • 6’ 10″ (2.09 m) Width
  • 78-3/4” (2 m) Height Folded
  • 37-3/4” (959 mm) Height Deployed
  • 13,500 lbs. (6,125 kg) Minimum Support Vehicle Weight

Product Images

Product Documents

PI Sheet

SS180® M


SS180® M Product Description Assembly Manual
SS180® M Using Truck Hydraulics Product Description Assembly Manual