Railcar Features

Innovations in Door Mechanisms

This manually operated door mechanism allows one person to operate the doors from either side of the car—eliminating the safety risk inherent in going from one side to the other.

It’s also an incredibly flexible mechanism. Unlike other manual systems, the Lock & Load doesn’t connect to the center sill, allowing for installation on cars with or without a center sill. It can be installed on cars with standard single doors, or double doors such as those on automatic hoppers. And it can be easily converted to an automatic system with just an air cylinder, lever and control valve.

In addition to being used in new construction, the Lock & Load system can be installed on existing cars as well—and it’s so simple, it can be done in the field using only basic railcar shop tools. Fewer moving parts also means fewer maintenance needs and a lower total cost of ownership.


This patented door mechanism is based on a unique design that combines safety, flexibility, and operating efficiency.

It can be installed on cars with or without center sills, using either one full-length set of doors or multiple sets that allow partial dumps in smaller pits with reduced take-away capacity. It’s made for full clean out, and the specially configured door lip seal securely holds very fine materials such as sand.

The system is designed to ensure that the flow of material being dumped stays within the width of the track, with no spillage on or outside the rails—so cars can dump in motion without fear of material build-up on the rail that can cause a derailment. With cars that have no center sills, bridging is reduced and there are no obstructions to impede the flow of even the densest of material.

As with our Lock & Load mechanism, the enhanced design has fewer moving parts, simplifying operation and maintenance and lowering the cost of ownership.