Motorized Vehicle Door Hazards Home Inspector with King of the
House Home Inspection, Inc February 27, 2016 Motorized vehicle doors
present serious safety risks for consumers who are unaware of the dangers
associated with defective doors. The door, in the video below, is an example
of what you do not want to see happen when an overhead door strikes an object
that was set flat on the garage floor. Anybody or anything
under that door would be seriously injured. This is a real world problem, I
have met people who have had pets maimed or killed by unsafe garage vehicle
doors. A motorized door, when it is operating correctly, will reverse at the
floor level if it comes in contact with an obstacle (standard test being a
1-1/2" object such as 2x4 lumber set flat on the floor). This next video
provides an example of a door that is reversing correctly.
Another standard safety
test, performed by King of the House Home Inspection during the course of
most inspections, involves verifying functionality of auto-reverse at
mid-height.
That motorized vehicle
door, smoothly and properly so, auto-reversed. Since 1993, sensors
have been required at the edges of motorized vehicle doors. Sensors must be
aligned with the eyes positioned 4" to 6" off the floor. If a
person, animal, or object breaks the infrared beam between the two eyes, the
door will reverse.
As an additional precaution,
the operator button must be within sight of the motorized door, so a person
who is planning to close the door can see if someone, or something, is under
the door. To guard against youngsters playing with doors, the wall button for
opening and closing a motorized door should be mounted at least 5 feet above
the highest horizontal surface (floor, stairs, etc.) that a person could
stand on to reach the button. Button mounted less
than 5 feet above the floor An improperly operating
motorized vehicle door presents a significant safety concern; therefore, I always
recommend having any defective vehicle door serviced by a qualified overhead
door professional. Service should include repair of deficient safety features
and checking for proper balance of the door (critical to safe operation).
Most homeowners do not have the technical skills, or the depth of knowledge
necessary, to repair or set the balance at a motorized vehicle door. Notice: Performing "impact" safety tests at old doors, or at doors that are out of balance, could result in damage to doors or mechanisms. Safety testing and all repairs should be conducted only by knowledgeable and qualified persons. |
© March 8, 2016 King of the House, Inc