Garage Door Safety Inspection in Ann Arbor, MI Reversal and Entrapment Testing

What the law actually requires of the opener

Federal regulation sets the baseline. Title 16 Part 1211 applies to residential garage door operators manufactured for sale from January 1, 1993 onward. It requires the operator to reverse the door within two seconds of contacting an obstruction. It requires a secondary means of entrapment protection in addition to that inherent reversal, and specifies what qualifies: an external photoelectric beam or an edge sensor that trips at a force of 15 pounds or less. An opener with no beam and no sensing edge is either older than 1993 or has had its protection defeated, and both answers point at replacement rather than adjustment. Where the fault is narrower, the individual repairs are listed on the service index.

The two tests, done in order

DASMA's residential checklist gives the practical procedure. First, the reversal test at the beam: with the door closing, break the photoelectric beam with an object and confirm the door stops and returns fully open. Second, the contact reversal: lay a solid object flat on the floor in the door's path, close the door onto it, and confirm the door reverses on contact. A door that hesitates, or that stops without reversing, or that needs the object to be tall enough to be seen has failed. These are done deliberately, with hands clear, and never with a person or pet as the obstruction.

The hand tests that tell you why it failed

The same checklist covers the mechanical half. Pull the release and lift the door by hand: it should move freely, it should not accelerate away from the force you are applying, the rollers should stay in the track, and it should stay in place 3 to 4 feet above the floor. A door that sinks is under-sprung and the operator has been compensating with force, which is the most common reason a contact reversal fails. Handles and grips are checked so hands cannot be caught in a pinch point between sections. Cables are inspected for broken strands at the bottom bracket where they flex and where salt collects.

The code items, and the rental cycle

DASMA's code inspection guidance adds items an inspector looks for: torsion spring anchor pads fastened to structurally sound load-bearing members, an extension spring containment system where extension springs are used, a manual release accessible within six feet of the floor on a residential door, a wall control station mounted at least five feet above the floor so a child cannot reach it, at least one entrapment protection device, and the manufacturer's warning labels intact. This matters on rentals in particular. The city inspects all rental units on a roughly 30-month cycle and issues a Certificate of Compliance under Housing Code Chapter 105, and section 8:516(4) bars leasing a unit without one, so an owner near campus in the Old Fourth Ward has a documented interest in the door passing rather than in it merely working.

The winter faults an inspection is built to catch here

Cold hides and creates failures in this climate, so the timing of the inspection changes what it finds. A bottom seal frozen to the slab makes the operator work against ice, which masks a force setting that is already too high. Brine dried on cable ends and bottom brackets corrodes the components under the most tension, and DASMA notes that rust reduces the effective cross-section of spring steel and that chlorine-bearing chemicals cause premature failure. Grease stiffened through the 122 days a year below freezing in the GLISA record for the city raises drag on every bearing. An inspection run in October catches those before a spring picks the coldest morning of the year. The report should list each test as passed or failed with the reason. Related: sensor repair and tune-up service.