The NOVA Lock-Up™ Vehicle Restraint is designed to secure an intermodal container chassis or trailer to a loading dock by engaging the Rear Impact Guard (RIG) with a vertical barrier operated by a control panel mounted inside the building. The Roller Slope Extension is designed to decrease resistance of carriage travel while it is adjusting to the height of the RIG on the trailer thereby saving wear on the RIG, carriage and pavement. Engagement range extends from 9-30 inches (229 mm to 762 mm) above the ground. A spring-loaded, structural steel housing automatically positions the unit when contacted by a backing truck.

Mounts to dock above ground level to stay clear of accumulated precipitation and debris. Protected from the elements with watertight connectors and zinc plating, which provides exceptional corrosion resistance.


  • Vertical barrier position ensures engagement with intermodal containers and trailer RIG configurations with cover plates or obstructions
  • Patented activation system ensures RIG/barrier engagement when electrical power is lost
  • Brakeless, direct drive gear motor specifically engineered for this application—no brake, clutch, sprockets, chain or adjustments required
  • Designed to accommodate the widest variety of RIG configurations
  • Low torque requirement to lift barrier into engagement
  • PLC-based control box provides maintenance diagnostics
  • LED lights are standard for energy efficiency and long life
  • Meets and exceeds ANSI MH30.3 requirements, tested and certified
  • Warranty up to 5 years

Vertical barrier ensures engagement by securing intermodal container chassis with rear impact guard obstructions.

Roller slope extension reduces/eliminates gouging/marking on the dock approach compared to “skid” style slope extensions.

Sealed magnetic proximity sensors with direct drive gear motor.


As the trailer backs into position, the RIG contacts the spring-loaded structural steel housing, which rides down in its track and allows the RIG to move over the top of the  housing. The dock attendant pushes the RESTRAIN button, which activates the vertical  barrier to secure the trailer to the dock. The vertical barrier can withstand a pullout force in  excess of 38,000 pounds. The Lock-Up™ restraint maintains contact with the RIG and  adjusts automatically with trailer float motion to ensure proper engagement at all times. If  there is a cover plate or obstruction above the rear impact guard, the vertical barrier adds  an additional level of safety providing secure engagement. An activation system ensures  RIG/barrier engagement when electrical power source is lost. After servicing is complete,  the dock attendant pushes the RELEASE button. In the event a trailer’s RIG is missing or  damaged, the Lock-Up™ will communicate a fault condition. An audible alarm and  flashing red light alerts the operator that the trailer has not been properly secured. The  operator may then override the fault condition and secure the trailer by other means. The  communication system automatically adjusts to reflect the current operational mode.


The vertical barrier weldment can withstand a pull-away force of over 38,000 pounds and is a lamination of two 2-3/4″ x 3/4″ thick ASTM A572 Grade 50 steel plates with 1″ ASTM A36  steel spacers in between. The vertical barrier weldment is located within the carriage  between the two side plates. The carriage side plates are constructed from abrasion- resistant 200F steel for maximum defense against wear from contact and friction with the  RIG. The 1-1/4″ diameter carriage axles and 2-5/16″ diameter rollers are both made from  cold-rolled 1045 steel. The roller track is formed out of ASTM A572 Grade 50 steel into a 6-3/8″ x 3″ channel with 7/8″ flanges. The roller track is attached to the dock face with 15  heavy-duty sleeve anchors that each measure 5/8″ x 4″ long.


All operator controls are mounted in a control panel that remains fully operational at all  times. Specially engineered electric motor and limit switches are enclosed in an abrasion resistant structural steel housing. Electrical components and wiring are UL listed® or  Recognized®. The Lock-Up™ restraint requires a power source of 110/115 volt, single-phase  with a 15 amp service circuit.


Outside Signal Lights and Control Box LED Lights: Indicates the restraint status

Audible Alarm: Alerts the dock attendant to potentially unsafe conditions

Horn Override: Customizable keypad allows override sequence to be password protected


  • Cantilever mounting bracket
  • IntelliDock Combination Control Box
  • Open dock stanchion for control box
  • Driveway plate for ground mounting
  • Green light interlock with leveler or door