Commercial Doors
A commercial door does in a month what a residential door does in a year, which changes everything about how it is specified and maintained.
Short answer
Commercial doors are heavier, cycle far more, and are frequently the only way in and out for the business — so a failure is downtime rather than inconvenience. The specification that matters is the cycle rating, the operator duty class and the hardware grade, and planned maintenance is cheaper than reactive call-outs.
What is different
Cycle count: a loading dock door can do more cycles in a week than a house door does in a year, which means everything wears proportionally faster.
Weight and size, which means heavier springs, heavier hardware and a different class of operator.
Operator duty class, which is a specification rather than a preference — a residential-grade opener on a commercial door fails quickly.
Door types: sectional, rolling steel, high-speed, fire-rated and insulated, each with its own service requirements.
Impact exposure, because forklifts and delivery vehicles hit commercial doors routinely.
And the consequence of failure, which is a business stopping rather than a car being stuck.
Cycle rating is the specification
A door doing fifty cycles a day is at eighteen thousand cycles a year. A standard spring at ten thousand cycles lasts seven months. Specifying the spring and the operator to the actual cycle count is the difference between planned maintenance and monthly breakdowns, and it is the most commonly under-specified item on a commercial door.
Planned maintenance
A scheduled interval matched to the cycle count rather than an annual visit.
Lubrication, hardware tightening, roller and hinge replacement on a wear schedule rather than on failure.
Spring and cable inspection, with replacement scheduled against the cycle count rather than waiting for the break.
Operator service, including the brake on a commercial operator and the limit switches.
Safety devices: photo-eyes, safety edges, and the reversing function, all tested and documented.
And a documented record, because on a commercial premises that is what the insurer and any inspector will ask for.
The things that cause downtime
Spring failure on an under-specified spring, which is the most common and the most preventable.
Impact damage from a forklift or a delivery vehicle, which is reduced by guards, bollards and a clear approach.
Operator failure on a residential-grade unit fitted to a commercial door.
Cable and drum wear from the cycle count.
Photo-eye and safety edge faults, which stop the door for safety reasons and are frequently a sensor rather than a door problem.
And a door being forced by staff when it binds rather than reported, which turns a maintenance item into a breakdown.
Common questions
Why do commercial doors fail so often?
Usually an under-specified spring and operator for the actual cycle count.
How often should they be serviced?
On an interval matched to the cycle count, not annually.
What reduces downtime most?
Specifying the cycle rating correctly, and replacing wear parts on a schedule rather than on failure.