Improve safety at the loading dock. Many forklift accidents occur every year that are caused by a truck prematurely departing from the dock or creeping away due to loading and unloading momentum. Installing a Vehicle Restraint from Sylvester’s can help prevent these accidents by securing a semi-trailer to the dock and providing better communication between the truck driver and dock attendant. If your facility is servicing trailers with varying rear impact guard designs, read this LODEM article and talk to Sylvester’s about the best restraint options for you.

PowerHook Series
PowerHook® Series Automatic Restraint
The PowerHook is a non-impact, self-aligning, hydraulic restraint that is stored in the dock pit and is the most effective truck restraining device available on the market.
- Stored in the dock pit and out of the way when clearing the drive approach of snow or debris.
- Actively seeks and secures a trailer’s Rear Impact Guard (RIG).
- Maintains a positive hydraulic hold of the RIG for zero running room.
- Rapidly flashing exterior light if the truck attempts to pull away while secured.
- LED 3-light system for advanced communication between the truck driver and dock attendant.
UniLock Series

TPR UniLock® Automatic Restraint
An upgrade to the standard TPR Series, the UniLock has an added internal safety mechanism, as well as advanced cam design that rotates the hook away from the trailer’s Rear Impact Guard (RIG) to release “RIG Wedge” pressure.
- Stored in the dock pit and out of the way when clearing the drive approach of snow or debris.
- Actively seeks and secures a trailer’s Rear Impact Guard (RIG).
- Maintains a positive hydraulic hold of the RIG for zero running room.
- Rapidly flashing exterior light if the truck attempts to pull away while secured.
- LED 3-light system for advanced communication between the truck driver and dock attendant.
TPR Series

TPR® Series Automatic Restraint
The TPR is a trailer-positioned vehicle restraint that is mounted to the face of the dock and utilizes a motor and gears to rotate a hook and secure the trailer.
- Unit automatically positions itself when impacted by the RIG.
- Motor and gears keep hook continuously engaged with the RIG.
- LED 3-light system for advanced communication between the truck driver and dock attendant.
UXL Restraint System

UXL Vehicle Restraint
The UXL is a wheel-based trailer restraint with advanced light communication. Package available as a standalone unit or integrated with other dock equipment. This universally effective chock helps prevent unexpected trailer departure or movement from the loading dock during the loading process.
- Universally Effective
- Steel Teeth
- Audible Alarms
- Advanced Communication
Wheel Chock Systems

UniChock™ Vehicle Restraint
The UniChock is a wheel-based trailer restraint with advanced light communication and available as a standalone unit or integrated with other dock equipment. Universally effective in most conditions, the unit helps prevent unexpected trailer departure or movement from the loading dock during the loading process.
- Universally Effective
- Audible Alarms
- Lightweight, Durable Design
- Advanced Communication
- Replaceable Traction Teeth

PowerStop® Series Automatic Restraint
Automatic Loading Dock Truck Restraint
The PowerStop® fully automatic vehicle restraint (AAL) is an easy-to-install, affordable restraining system. It comes equipped with a RIG sensor bar that notifies dock workers if the restraint’s arm is not securely engaged with the trailer’s Rear Impact Guard.
The PowerStop® will withstand up to 32,000 lbs. of pull-out force and has a horizontal service range of 0” to 10” and a 12” minimum to 29.5” vertical service range. It can be integrated with any mechanical, hydraulic, or pneumatic dock leveler, making it extremely versatile for a wide variety of applications. The PowerStop® is available as a stand-alone unit or can be integrated with other loading dock equipment.


Dock Accessories
Sylvester’s offers a full line of Loading Dock Accessories, including:
- Control Panels & Communication Systems & Lighting
- Dock Seals & Dock Shelters
- Vehicle Restraints
- Wheel Chocks
- Dock Lifts
- Dock Plates
- Dock Boards
- Dock Bumpers – Molded Dock Bumpers – Laminated Dock Bumpers
- Yard Ramps
- Dock Lights Arms with integrated Dock Lights & Dock Fans
- Dock Leveler Lighting
- Dock Overhead Door Lighting
- Driver Cages
- Virtual Projectors illuminating Safety Lines, Walkways, Signage
- Convex Safety Mirrors

