Commercial door answers, with the standard printed beside them
Four questions facility and property managers actually ask, answered from the industry’s own technical sheets rather than from a sales page. Every number on these pages names its document, links the PDF, and carries the date we last checked it, so you can verify anything here without taking our word for it.
Prefer to ask a person? The same knowledge answers the phone, and the question costs nothing.
Call (905) 536-5369How often should a commercial garage door be inspected?
Annually by a trained technician at minimum, quarterly checks on powered doors, monthly tests on the safety edge, and an immediate look after a storm. Where each number comes from, and the 35-pound rule your staff can check with one pull.
Read the guide → SpecificationHigh-speed door or rolling steel: which does your opening need?
The crossover is about 55 cycles a day, from DASMA’s own energy analysis. Under it, buy insulation; over it, buy speed. The arithmetic, the code numbers, and the four other factors that settle the rest.
Read the guide → SafetyWhat must the safety edge on a powered door actually do?
Only a monitored device counts as entrapment protection under UL 325, it should be tested monthly, and a close button that suddenly needs holding down is the door reporting the device has dropped out.
Read the guide → Loading dockWhat does a dock door take that a wall door does not?
Openings of 8×8 to 10×10, a floor four feet above grade, hourly round-the-clock duty cycles, forklift impacts, and a fall hazard whenever it opens on an empty dock. What that means for the door you specify.
Read the guide → ConstructionWhat is the “Red Zone” around a rolling door?
The wall space that must stay clear of conduit, sprinklers and fixtures for the door to be installed and serviced, and the signed diagram DASMA advises putting in the shop drawings so it stays clear.
Read the guide →Why a door company publishes these
Because the questions above get answered badly on the internet, and a facility manager deserves better than a sales page pretending to be an answer. Where the industry publishes a number, we quote the document and link it. Where the answer depends on your building, on cycle counts, wind exposure, what is mounted near the opening, we say that instead of inventing a universal rule.
The sheets these pages draw on are published by DASMA, the Door & Access Systems Manufacturers’ Association: the trade body whose members build the doors, operators and sensing devices themselves. Roughly eighty of its technical sheets cover commercial and industrial doors. These guides quote the ones that answer the questions we hear most, and the high-cycle springs page carries the cycle-life numbers, since that is where that decision actually gets made.
Every source is re-checked when a page is updated, and the checked date is printed on each citation. If a linked document has moved or changed by the time you read it, we want to know: info@garagedoorman.ca.