Overview
The Poweramp® TPR UniLock® is a trailer-positioned vehicle restraint. It locks onto a trailer's Rear Impact Guard (RIG) to keep the trailer secured at the dock. A self-contained motor assembly powers the system. It helps prevent unexpected trailer departure during the loading and unloading process.
It solves a common problem called RIG Wedge. RIG Wedge happens when the trailer gets pushed forward during loading. The RIG presses so hard against the restraint hook that the truck driver has to reverse the trailer just to release it. The UniLock's cam design rotates the hook away from the RIG first. Then it lowers the hook to a stored position. No trailer reversing needed.
An internal locking mechanism also holds the hook in place when pressure is applied. This keeps the restraint engaged on any obstructed RIG — including intermodal trailers with cover plates.
The UniLock is designed, engineered, and manufactured in the USA. It comes standard with Poweramp's iDock® 2.0 control system. That means dynamic messaging, LED light communication, and optional connectivity to the myQ® Enterprise platform.
Features & Benefits
The TPR UniLock® is designed to secure a cargo trailer's Rear Impact Guard and reduce the chance of premature trailer separation. The system includes an electric mechanical restraint, an iDock control panel, exterior communication lights, and instructional signs. It covers a service range of 9" to 30" off grade. Restraining force exceeds 32,000 lbs. That gives your dock a strong margin of safety on every load.
The exclusive gear motor keeps the hook engaged against the RIG at all times. If the restraint gets forced down, it re-engages automatically. The motor is IP67-rated — submersion proof up to 1 meter — with a NEMA 4X control panel. The zinc-plated steel housing can withstand direct trailer impact and protects internal components from any weather conditions. The iDock® 2.0 control panel manages the full communication cycle.
As a truck approaches, the exterior light is green and the interior light is red. Once the trailer is restrained, the interior light turns green. That tells the dock attendant it's safe to enter. The exterior light turns red. That warns the driver not to pull away. When the trailer is released and the hook is stored, the lights reset. An amber light activates for bypass mode or fault conditions. iDock 2.0 Controls connect online with the optional myQ® Enterprise platform for remote monitoring across all dock positions.
Applications
The UniLock is built for high-traffic docks that need dependable trailer security across a variety of trailer types — especially where standard vehicle restraints fall short. It is highly adaptable to new or existing loading docks and is particularly valuable at facilities that regularly deal with intermodal trailers, obstructed RIGs, or RIG Wedge delays.
The UniLock is ideally suited for:
- Facilities receiving intermodal trailers or trailers with cover plates — the UniLock ensures secure engagement is always maintained using the internal safety mechanism that locks the hook in place, even on obstructed RIGs where other restraints cannot latch.Unilock RetroFit.pdf
- High-volume distribution and warehousing operations — eliminate time wasted reversing trucks to release RIG Wedge pressure. The advanced cam design handles it automatically, increasing throughput and efficiency across every loading cycle.Unilock RetroFit.pdf
- Docks requiring leveler interlock — integrated iDock Controls support a safe leveler interlock sequence, making the UniLock appropriate for facilities where the dock leveler must be sequenced with the restraint to prevent premature trailer access.TPR UniLock Brochure.pdf
- New dock construction — the UniLock is designed to be permanently mounted to the loading dock foundation and can be specified during the design phase, with options for wall mounting embed plates, approach plates, and cantilever brackets to suit any dock configuration.UniLock Spec Sheet.pdf
- Existing TPR® retrofits — upgrade an existing TPR to the UniLock and gain an advanced cam design that automatically releases RIG Wedge.Retrofit kits require disassembly of the existing TPR unit and installation of all kit components. Kits for TPR units purchased after September 2017 are not compatible with units purchased prior to September 2017. Contact Barron to confirm compatibility before ordering.
Selection Assistance
Finding the right trailer restraint system starts with understanding what your dock actually deals with day to day. The UniLock is built for the most demanding applications — but the right configuration depends on your trailer mix, dock structure, control preferences, and integration needs. Barron Equipment's team can assess your current setup and make a recommendation based on real-world conditions.
All UniLock vehicle restraints include a full one (1) year base warranty on all structural, mechanical, and electrical parts, including freight and labor charges. Systems, LLC warrants all components to be free of defects in materials and workmanship under normal use during the warranty period. The warranty period begins upon completion of installation or the sixtieth (60th) day after shipment, whichever is earlier.
Contact us directly or through the contact form below, Barron's team will walk through your application, trailer types, and dock configuration to get you to the right answer fast.