Commercial openers
Commercial Garage Door Operators
A commercial garage door opener is built for bigger, heavier doors and more cycles than a home unit. G Brothers has done 57 commercial operator jobs since 2018, covering trolley, wall-mount (jackshaft) and chain hoist operators, installed and repaired for businesses and properties across the Denver metro.
What this service covers
Real work by background-checked local technicians, quoted at a flat rate you approve before anything begins.
Commercial operator installation
34 of the 57 jobs were installs or replacements. 15 named LiftMaster.
Commercial operator repair and service
32 of the 57 were service or repair, including arms, brackets and trolleys.
Type by type
Wall-mount or jackshaft (8 jobs), trolley (7 jobs) and chain hoist (2 jobs) where the type is named.
With a new door
12 of the 57 went in together with a new commercial door.
From our job records
Counted from our own completed records that name a commercial opener or operator.
- Commercial operator jobs since 2018
- 57
- Busiest months
- Mar to Apr
- Feb 2023: LiftMaster commercial trolley operators with 12-foot and 14-foot rails, each with photo-eyes and a three-button station, one remote per door.
- Sep 2022: a commercial opener with a bent lift arm needed a new arm.
- Jul 2025: a commercial trolley opener was replaced during a spring replacement visit.
Which commercial operator fits
Trolley operators suit standard sectional doors, including doors that need a 12- or 14-foot rail.
Wall-mount (jackshaft) operators suit high-lift or limited-headroom doors and keep the ceiling clear.
Chain hoists are a manual backup or a manual-only choice on larger doors.
Commercial trolley operators in our records came with photo-eyes and a three-button station.
How it works
- 1
Call or book online
Tell us the door size, how often it cycles, and what the building is used for.
- 2
On-site check and flat quote
The technician checks the door, springs and headroom and recommends an operator type, with a flat price to approve.
- 3
Done and tested
We install or repair the operator, set limits, force and safety devices, and test the door through a full cycle.
Why facility managers call G Brothers
Fast response, day or night
Our average response is about an hour and a half, and that holds for a commercial call at 2am.
Parts on the truck
Common springs, cables, rollers and operator parts are stocked on the truck, so many repairs are finished on the first visit.
Every operator, every brand
Jackshaft, trolley, hoist and gate operators on any make, so we repair the equipment you already have.
Insured, with paperwork fast
Licensed, insured, background-checked technicians, with a certificate of insurance usually sent within 24 hours.
One account for every property
Property managers can put every door on every building on one account.
Warranty on the work
One year on labor and three years on parts.
More than 40 years in the trade
Family-owned, BBB accredited, and rated 4.9 stars across 400+ Google reviews.
Reviews
Rated 4.9 across 400+ Google reviews
Property managers, contractors and homeowners trust G Brothers for fast, honest garage door work.
Based on 400+ Google reviews
Upfront, flat-rate pricing
Your estimate is free. We diagnose the problem on site, then give you one flat price to approve before any work begins. No surprises, no pressure, and an honest recommendation on whether a repair or a replacement is the better value. Free estimates cover garage door repair, spring, opener, and replacement work. Remote and keypad programming is quoted when you book.

Visit us
Find G Brothers Garage Doors
Reach out for same-day garage door service. Our technicians come to you for every repair, replacement, and install.
Our shop
7700 W 9th Ave, Lakewood, CO 80214
Open 24/7 for emergency garage door service.
Common questions
Quick answers about commercial door operators and related work from the G Brothers team.
Do you install commercial openers on new doors?
Yes. 12 of the 57 commercial operator jobs in our records went in together with a new door.
Is a commercial opener different from a home opener?
Yes. It is built for larger doors and more cycles. See the commercial versus residential opener guide.
Why won't my commercial garage door close?
Usually the photo eyes or reversing edge are blocked or faulted, so the operator closes only while someone holds CLOSE. Check interlocks and limits too.
Read full answerHow do I open a commercial roll up door manually?
Cut the power, then use the chain hoist or floor disconnect, or lift a door with no motor by its bottom bar. Stop if it feels far heavier than normal.
Read full answerWhat is the difference between a commercial and a residential garage door opener?
Commercial openers are built for heavy doors, high daily cycle counts, and continuous operation under multiple users.
Read full answerWhy is my garage door opener motor overheating and shutting off?
The motor has a thermal overload protector that cuts power when it gets too hot, usually after repeated cycles without a cool-down break, or because it is straining against a heavy or unbalanced door.
Read full answerWhat are the requirements for installing a jackshaft garage door opener?
A jackshaft opener requires a torsion spring system (not extension springs), at least 8 inches of clear wall space on one side of the door, 4 inches of clearance above the torsion bar, and a 1-inch diameter torsion bar.
Read full answerWhat are the safety requirements for a commercial garage door?
A commercial garage door needs a UL 325 listed operator with a monitored photo eye or sensing edge, must meet the building and fire codes your city adopts, needs a yearly NFPA 80 test if it is fire rated, and falls under OSHA's duty to keep the workplace free of known hazards.
Read full answerRelated services
Service areas
Commercial Door Operators across the Denver metro
G Brothers services commercial door operators for warehouses, retail, storage and multi-unit properties across the Denver metro. Find your city below.
Ready to get started?
Book same-day service or a free estimate. Available 24/7.
Learn more
Guides & resources
Learn more about commercial door operators before you book.
- Overhead Garage Door Repair: Common Issues With Tracks, Rollers, and SpringsMost overhead garage door repair comes down to three parts: the tracks, the rollers, and the springs. Track and roller work is a safe DIY fix. Leave spring repair to a pro because of the high tension involved.Read guide
- What Is an Overhead Door? Types, Benefits, and How to ChooseAn overhead door is any door that opens vertically and stores flat against the ceiling when fully open. Most residential garage doors are overhead doors. The type, material, and insulation you choose determine how it performs in Colorado's climate.Read guide





