A worker is performing a duty near the ceiling within the path of travel of an automatic overhead door. Without warning, the door begins to move and the top edge of the door collides with the worker or what he is standing on, causing the worker to fall to the ground.
Every situation is different. Circumstances and information provided affect the outcome of the claim. No two cases are the same and factors that pertain to one case do not always apply to another.
Many case scenarios involve a worker that was perched upon a ladder, scissor lift, or some elevated platform with no fall precautions, no assistant working at ground level monitoring him, and no usage of safety harnesses or tie off precautions. Most safety protocols limit working above 6 feet in height without safety restraints in place.
Usually, the door has been remotely activated by another person from the exterior, not realizing that there is somebody working within the path of travel of the overhead doorway. In every case, the worker has fallen off of the raised location after making direct or transferred contact with the overhead door top edge.
From the perspective of a plaintiff’s attorney, there should be some sort of sensor or safety edge on the top end of the overhead door, and they do not think that their clients are responsible for the incident. They usually haven’t asked if their client was using an approved safety harness or appropriate fall protection when working high above the floor. Nor have they checked to ask their client if there was any consideration given to check that the door would not move when they were working in proximity to it.
Defense attorneys are seeking proof that the overhead door is within industry standards. And, hoping that their defendant or cross defendant is without blame or responsibility.
These overhead door collision injuries have occurred in a variety of environments including industrial settings, automotive bays, apartment garages, personal residences, loading dock areas, hospitals and hotels.
The overhead door industry has adopted specific standards for door safety. Included in these standards are motor controllers with specific reverse functions, safety sensors, and emergency push button controls that can completely disable an overhead door system. Slip clutches are incorporated in most motor controllers. These devices allow a specific force resistance to stop the motor controller action from either pushing or pulling the door when the set threshold is reached, depending upon the product and manufacturer.
In most cases where an overhead door upper edge made contact with an obstruction in the path of travel, these force resistance devices were functioning properly. This did not offer any protection to a worker performing services within the path of travel of the door system. The elevated platform did not offer adequate resistance to activate the slip function of the motor controller. The workman should have taken the necessary precautions to make sure that the motor controller was deactivated prior to working in that space.
Many commercial overhead doors utilize similar sensor technology to residential overhead doors, others do not. In commercial applications, there are usually more stringent safety devices in place to stop or start the movement of the overhead door system. Commercial doors are usually referred to as “trained traffic” openings. This means that most users of these doorways have been instructed as to how to properly open and close the door by the management of the facility where they are installed. Most residential overhead doorways are considered non-commercial and are generally used by “untrained traffic” where the push of a remote button is all that is needed to operate the door. fire door suppliers
In general, commercial overhead doors are not designed to monitor or sense the presence of an obstruction within the overhead path of travel of that door system. Motor controllers that contain auto reverse circuits and slip clutches are generally designed to address a downward force to prevent crushing an obstacle in the space between the door bottom and threshold of the system. As of this writing, there are no standards or specifications in place that require the upward leading edge or door top to have any additional sensory systems to prevent contact with a person perched atop a ladder or lift in the path of travel when opening. This will probably not change due to the fact that this type of injury claim is really a workplace training issue, and not a door function issue.
Would it make sense to develop a leading edge sensor or some sort of optical device to protect a workman from being hit by the top edge of a moving overhead door?
The facts are, that these types of devices already exist and the usage of these safety products for this application have limited value. In most cases, a professional trained workman is aware of the potential for door activation, and would take the necessary steps to make certain that the door cannot move while working within the path of travel of the overhead doorway. The repeated collisions that seem to be happening more frequently are the result of improperly trained workers, not defective door system designs.
In most companies, employee training and education involves showing employees how to safely work in any environment where their job might take them. An example of one of the most basic safety rules involves a “lock out and tag program”. This “lock out and tag program “has been in effect in numerous trades for decades. In this program, it is the responsibility of any worker to make certain that any moving piece of equipment, powered device, auto start mechanism, or (in this case) doorway, where they will be performing their duties, cannot affect their work space.