Ask most people what holds a door up and they will point at the frame. The real answer is three or four pieces of hinged steel about the size of your palm. On a busy commercial entrance those hinges can swing a heavy door a few thousand times a week, and when one starts to fail the whole opening tells on it: the door drops at the latch edge, drags on the threshold, squeals every time someone walks in, or stops latching at all.
Choosing and maintaining the right hinges is one of the least glamorous parts of running a commercial property, and one of the most quietly important. The wrong hinge on a high-traffic door wears out fast, throws the door out of alignment, and can even void the label on a fire door. The right one disappears into the background and does its job for years.
This guide walks through the hinge types you will actually see on commercial doors across the Greater Toronto Area, how they are graded, how many you need and what size, where they get placed, what the fire code and accessibility rules expect, and how to tell when a hinge needs a tweak versus a full replacement. It is written for business owners, property and facility managers, and anyone who has watched a front door slowly sag and wondered whether it was a big problem or a small one.
What makes a hinge “commercial” in the first place?
A commercial door hinge is a heavier, higher-cycle version of the butt hinge on your house door. It is built from thicker steel or stainless, usually carries ball bearings between the knuckles to handle constant use, and is graded against a written performance standard so an architect or contractor can specify it with confidence. Residential hinges are not tested or built for that duty.
The gap between the two shows up in a few places. A commercial hinge is taller and thicker (commonly 4-1/2 or 5 inches versus 3-1/2 inches at home), it uses ball bearings or another bearing type instead of a plain barrel, and it is rated for a set number of open-and-close cycles. It also has to play nicely with the rest of the opening, including the closer, the lock, the frame, and any fire or accessibility label on the door. Hinges are one piece of the larger commercial door hardware package, and they have to be matched to the door they are hung on.
The main types of commercial door hinges
Most commercial openings use one of a handful of hinge families. Knowing which is on your door makes every later decision, from ordering a replacement to diagnosing a sag, much easier.
Full mortise butt hinges
This is the workhorse. A full mortise hinge has two leaves that mortise (recess) into the door edge and the frame, joined by a pin through interlocking knuckles. You will find them on hollow metal doors, wood doors, and most swinging commercial entrances. When someone says “commercial door hinge” without any other detail, this is almost always what they mean, and it is the type behind most commercial door hinge replacement work.
Ball-bearing versus plain-bearing hinges
The difference sits inside the knuckles. A plain-bearing hinge has metal riding on metal, which is fine for a light, low-traffic door. A ball-bearing hinge places small bearings between the knuckles so the door swings smoothly under load and keeps doing it after tens of thousands of cycles. Any door with a closer, any high-traffic entrance, and any heavier door should be running ball-bearing hinges. Plain bearings on a door with a closer wear quickly, start to squeal, and let the door sag. If your door closer is fighting worn plain hinges, no amount of closer adjustment will fully fix the swing.
Continuous (geared and piano) hinges
A continuous hinge runs the full height of the door as a single unit instead of three or four separate hinges. Geared continuous hinges, common on aluminum storefront and high-abuse doors, distribute the load along the entire edge, which is why they hold up so well on doors that get slammed, propped, and leaned on all day. Because the load is spread out, they resist the sag that eventually pulls three-hinge doors out of square. They are a frequent upgrade on aluminum storefront doors and on any entrance that has already worn out a set of butt hinges.
Spring hinges
A spring hinge has a coiled spring inside the barrel that pulls the door closed on its own. They show up on lighter interior doors where a full closer is overkill but the door still needs to self-close, and they are listed for some fire door applications. Their weakness is control: a spring hinge closes with a snap rather than the smooth, regulated action of a closer, so on a main entrance or an accessible door a proper closer is usually the better call.
Pivot hinges
Instead of mounting on the edge, pivot hinges carry the door on points at the top and bottom (and sometimes an intermediate pivot). Center-hung and offset pivots are standard on heavy aluminum and glass storefront doors, where the weight would overload edge-mounted butt hinges. If your entrance is a glass or aluminum storefront door and the “hinge” is a bracket top and bottom rather than three leaves down the edge, you are looking at a pivot system, and repair or replacement is handled differently than a butt-hinged door.
Specialty hinges
A few less common types solve specific problems. Swing-clear hinges rotate the door completely out of the opening so the full frame width is usable, which matters for wheelchair clearance and moving equipment through. Wide-throw hinges push the door farther clear of deep frames or trim. Electrified (transfer) hinges route low-voltage wiring from the frame into the door to power an electric strike, electrified lock, or exit device without an exposed cable. Anchor hinges add a reinforcing strap into the frame for very heavy or abused doors.
| Hinge type | Where it fits | Main strength | Watch out for |
|---|---|---|---|
| Full mortise butt (ball-bearing) | Hollow metal and wood swing doors, most entrances | Proven, serviceable, easy to source | Needs the right weight class for the door |
| Plain-bearing butt | Light, low-traffic interior doors | Low cost | Wears fast under a closer or heavy use |
| Continuous (geared) | Storefront, high-abuse, high-traffic doors | Spreads load, resists sag, long life | Higher upfront cost, full-length install |
| Spring | Lighter self-closing interior doors | Self-close without a full closer | Snappy, uncontrolled close |
| Pivot | Heavy glass and aluminum storefront doors | Carries very heavy doors | Specialized adjustment and parts |
| Swing-clear | Accessible routes, equipment paths | Recovers full clear opening width | Costs more than a standard hinge |
| Electrified (transfer) | Access-controlled doors | Hidden power transfer to the door | Needs correct wiring and coordination |
How commercial hinges are graded
Commercial hinges are not sold on looks. They are tested and graded so a specifier can match the hinge to the duty of the door. In North America the performance standards come from the Builders Hardware Manufacturers Association, the body accredited by ANSI to write these standards. The two that matter most for hinges are ANSI/BHMA A156.1 for butts and hinges and A156.7 for template hinge dimensions, which covers continuous geared hinges.
Two ideas do most of the work. The first is weight class: hinges are made in standard weight and heavy weight, and heavier or higher-traffic doors move up to heavy weight. The second is bearing type and cycle life: a hinge is tested to a set number of open-and-close cycles, and the higher grades survive far more cycles before they show wear. For a door that sees constant public traffic you want a heavy-weight, ball-bearing hinge rated for high cycle counts, not a builder-grade hinge that happens to be the right size.
| Door duty | Suggested hinge | Why |
|---|---|---|
| Light interior, low traffic | Standard weight, plain or ball bearing | Low load, few cycles per day |
| Standard commercial, with closer | Standard or heavy weight, ball bearing | Closer adds constant load on the hinges |
| Heavy or high-traffic entrance | Heavy weight, ball bearing, high cycle | Weight plus thousands of cycles per week |
| High-abuse or slammed door | Continuous geared hinge | Load spread over the full door height |
Materials and finishes
Most commercial hinges are carbon steel, stainless steel, or brass. Steel is the default indoors. Stainless earns its keep on exterior doors, in coastal or de-iced environments, and anywhere moisture and road salt attack plain steel, which covers a lot of GTA exterior entrances through winter. Brass and bronze show up where appearance matters, such as a hotel or a heritage storefront.
Finishes follow the BHMA finish codes you see on hardware schedules, such as 630 for satin stainless steel or 652 for satin chrome-plated steel. The finish is not only cosmetic. On an exterior door, a corrosion-resistant base metal and finish decide whether the hinge is still smooth in five years or rusted and weeping stains down the frame. Match the hinge finish to the rest of the opening so the door, the lockset, and the hinges read as one set.
How many hinges does a commercial door need?
The count follows door height. Doors up to 60 inches tall take two hinges, doors over 60 up to 90 inches take three, and doors over 90 up to 120 inches take four, adding one more hinge for each additional 30 inches of height. Because a standard commercial door is around 7 feet (84 inches), most commercial doors run three hinges, with a fourth added on tall or unusually heavy doors.
That extra hinge is not busywork. Adding a hinge shares the load across more points, reduces the strain on any single hinge and its screws, and slows the sag that develops on heavy doors. If a heavy door in your building is on two hinges, it is under-hinged, and that is often the hidden reason it keeps dropping out of alignment. Door height also drives other specs, so it is worth knowing your standard commercial door sizes before ordering anything.
| Door height | Number of hinges | Typical example |
|---|---|---|
| Up to 60 in | 2 | Short access or utility door |
| Over 60 to 90 in | 3 | Standard 7 ft commercial door |
| Over 90 to 120 in | 4 | Tall entrance or oversized door |
| Each additional 30 in | Add 1 | Extra-tall specialty door |
What size hinge do you need?
Hinge height is driven by the door thickness and width, with weight and traffic pushing you up a size. As a rough guide, standard commercial doors up to about 36 inches wide use 4-1/2 inch hinges, heavier or wider doors move to 5 inch hinges, and oversized or industrial doors go larger still. Residential doors typically use 4 inch hinges, which is one reason a house-grade hinge is the wrong part for a commercial opening.
Width of the hinge (open dimension) matters too, because it has to clear the door and any trim as the door swings. This is where a deep frame or heavy weatherstripping can force a wide-throw hinge. Getting the size wrong leaves you with a door that binds, will not open fully, or overloads undersized hardware.
| Door type | Common hinge height | Notes |
|---|---|---|
| Residential interior | 4 in | Not rated for commercial duty |
| Standard commercial (to ~36 in wide) | 4-1/2 in | The common default |
| Heavy or wider commercial | 5 in | Move up for weight or width |
| Oversized or industrial | 6 in or continuous | Consider a geared continuous hinge |
Hinge placement and the 7-11 rule
Placement is standardized so doors, frames, and hinges are interchangeable. The common convention people call the 7-11 rule puts the top hinge 7 inches down from the top of the door and the bottom hinge 11 inches up from the bottom, with the middle hinge centered between them. Commercial and heavier doors usually shift to 5 inches from the top and 10 inches from the bottom instead, which is the placement you will find on most hollow metal and steel-frame openings.
The top hinge carries the most load because it resists the door trying to pivot and droop, which is why it fails first and why the top screws pull loose before the others. When a fourth hinge is added, it usually goes between the second and third positions. Keeping to standard placement means a replacement hinge or a new door drops straight into the existing prep on the frame.
Fire-rated doors have their own hinge rules
On a fire door the hinges are part of a tested, labeled assembly, and you cannot swap in whatever fits. Fire door hardware is governed by NFPA 80 and, in Ontario, by the fire and building codes. Hinges on a fire door have to be steel, and rated openings that carry a closer require heavy-weight ball-bearing steel hinges. The number and size of hinges, and the pin type, are set by the door’s listing, so any change has to keep the assembly within its label.
That is why hinge work on a fire door is not a casual job. Using a non-listed hinge, the wrong material, or the wrong count can void the fire rating and leave you offside on an inspection. If your building has labeled fire doors, keep hinge changes inside the listing and document them. Our guides to fire rated doors and Ontario Building Code fire door requirements go deeper on how the whole assembly has to stay compliant, and the Ontario Building Code (O. Reg. 332/12) is the governing regulation for the province.
Security: do not let the hinge become the weak point
On an out-swinging exterior door, the hinge knuckles and pins sit on the outside, which means an intruder could try to knock the pin out and lift the door off. The fix is a hinge with a non-removable pin (NRP), a set screw that locks the pin in place, or a security stud (a small pin and hole that interlock the leaves so the door stays put even if the pin is removed). Any exterior door that swings out should have this protection.
Hinges are one layer of the wider door security picture, alongside the lock, the strike, and the frame. If you are reviewing entrance security, our overview of commercial property door security upgrades covers how the pieces work together, and access-controlled doors often pair security hinges with an electrified strike or an electrified exit device.
Hinges, accessibility, and door swing
Hinges affect how much of the opening a person actually gets to use. A standard butt hinge lets the door swing back only so far, and the door slab itself eats into the clear width. Swing-clear hinges rotate the leaf out of the opening so a wheelchair or a cart gets the full frame width, which can be the difference between meeting and missing a barrier-free clearance. This ties directly into accessible door width rules.
Hinges also work alongside the closer to control opening force, which the barrier-free provisions of the building code limit so that people of all abilities can open the door. Worn or binding hinges raise the effort it takes to open a door, so a hinge problem can quietly turn an accessible door into a non-compliant one. Where a manual door cannot meet the force limits, a power operator is the usual answer, which our guide to commercial automatic doors covers in detail.
Common commercial hinge problems and what they mean
Hinges rarely fail without warning. They give you symptoms, and each one points at a likely cause. Catching them early is usually the difference between a quick service call and a door that has damaged its own frame.
| Symptom | Likely cause | What it usually needs |
|---|---|---|
| Door sags at the latch edge, rubs the sill | Worn top hinge, loose or stripped screws, under-hinged door | Re-anchor or replace hinge, add a hinge |
| Squealing or grinding on every swing | Dry or worn bearings, dirt in the knuckles | Lubricate, or replace worn hinges |
| Door binds or is hard to open | Bent hinge, misalignment, wrong hinge width | Realign, shim, or re-size the hinge |
| Hinge pin creeps up or works out | Worn knuckles, no pin retention | Replace hinge, add NRP or set screw |
| Screws keep loosening at the frame | Stripped holes, thin frame, overload | Longer screws, frame repair, heavier hinge |
| Door will not latch anymore | Hinge sag has dropped the latch out of line | Correct the hinges, then the strike |
A grinding or squealing door is the one people ignore longest, and it is usually the cheapest to catch early. Our post on why a commercial door makes a grinding noise walks through what that sound is telling you.
Repair or replace the hinges?
Not every hinge complaint needs new hardware. If the screws have simply worked loose, re-anchoring them (often with longer screws that bite into the frame or a repair plate) can bring a door back into line. Dry bearings can sometimes be cleaned and lubricated. Minor misalignment can be shimmed.
Replacement is the right call once the knuckles are visibly worn, the bearings are shot, the pin will not stay put, a hinge is bent, or the door has been sagging long enough that the hinges are no longer the right weight class for the abuse they are taking. The key is to replace with a hinge that matches or exceeds the original spec, in the same prep, so the door drops back into alignment. This is the same repair-or-replace logic we apply across doors and windows, laid out in our guide to deciding between repair and replacement.
How commercial hinge replacement actually works
On a hollow metal door, the frame and door edge are prepped for a specific hinge template, and the frame has internal reinforcement at each hinge location. A proper replacement matches that template so the new hinge lands on the existing holes and reinforcement. On a sagged door, the technician often has to address stripped screw holes or a tired frame at the same time, because a fresh hinge screwed into a blown-out hole will loosen again within weeks.
The sequence is usually straightforward for a specialist: support the door, remove one hinge at a time so the door stays hung, swap in the matched hinge, re-anchor into sound material, then check the swing, the gaps (reveal), and the latch. Where the frame itself is the problem, that gets sorted first, which is why hinge work and steel door frame repair often go together. On hollow metal doors especially, matching the hinge to the door and frame is what keeps the fix permanent. When a door needs this, our commercial door hinge replacement service handles the match and the install.
What drives the cost of hinge work
Hinge pricing varies with the door, the hardware, and the condition of the opening, so a walk-up quote is always more accurate than a number over the phone. These are the factors that move it.
| Cost driver | Why it matters |
|---|---|
| Hinge type and grade | A geared continuous or electrified hinge costs more than a standard butt hinge |
| Number of hinges and doors | More openings and more hinges per door add labour and parts |
| Condition of frame and screw holes | Stripped holes or a damaged frame add repair time |
| Fire or accessibility requirements | Listed hardware and code coordination take more care |
| Access and timing | After-hours or emergency work to avoid downtime |
If a hinge failure has your door stuck open, insecure, or unusable, that moves into commercial door repair territory rather than planned maintenance, and getting it stabilized quickly protects both security and the door itself.
Choosing hinges by property type
The right setup depends less on the industry name over the door and more on how hard the door gets used and what rules apply to it. Here is a quick orientation.
| Property or door | Sensible hinge choice |
|---|---|
| Retail or restaurant front entrance | Heavy-weight ball-bearing or continuous hinge, high cycle |
| Office interior doors | Standard-weight ball-bearing butt hinges |
| Warehouse or industrial personnel door | Heavy-weight or continuous, with NRP if exterior out-swing |
| Healthcare or institutional | Ball-bearing, swing-clear where clearance is tight |
| Labeled fire door | Steel, ball-bearing, per the door’s listing |
| Aluminum or glass storefront | Pivot or continuous geared hinge |
A simple hinge maintenance schedule
Hinges reward a little routine attention. A few minutes on a schedule prevents the slow sag that eventually damages frames and locks. Fold this into whatever you already do for the rest of your commercial doors.
| Interval | Task |
|---|---|
| Monthly (high-traffic doors) | Look and listen for sag, squeal, or a door that will not latch |
| Quarterly | Check and snug hinge screws, confirm pins are seated |
| Twice a year | Lubricate bearings, inspect exterior hinges for corrosion |
| Annually | Full opening check, including fire door hardware within its listing |
Talk to a GTA commercial door specialist
If a door in your building is sagging, dragging, squealing, or refusing to latch, the hinges are the first place to look, and the fix is usually far cheaper than the frame or door damage that follows if you leave it. Commercial Door Pros works with businesses and property managers across the Greater Toronto Area on hinge replacement, alignment, and the frame and hardware work that often comes with it. You can contact our team to book an assessment, or reach out about a full commercial door installation if the door itself has reached the end of the road.
Frequently asked questions
What type of hinges are best for commercial doors?
For most commercial doors, heavy-weight ball-bearing full mortise hinges are the best all-around choice. They handle the weight and the constant cycling that come with a closer and public traffic. For high-abuse or slammed doors, a continuous geared hinge lasts even longer because it spreads the load along the full height of the door.
What size is a standard commercial door hinge?
The common standard commercial hinge is 4-1/2 inches tall. Heavier or wider doors move up to 5 inch hinges, and oversized or industrial doors use larger sizes or a continuous hinge. Residential doors usually use 4 inch hinges, which are not built for commercial duty.
What is the 7-11 hinge rule?
The 7-11 rule is a placement convention: the top hinge sits 7 inches down from the top of the door and the bottom hinge sits 11 inches up from the bottom, with the middle hinge centered. Commercial and heavier doors often use 5 inches from the top and 10 inches from the bottom instead.
How many hinges does a commercial door need?
It follows height. Doors up to 60 inches take two hinges, doors over 60 up to 90 inches take three, and doors over 90 up to 120 inches take four, adding one more per additional 30 inches. Most standard commercial doors, at around 7 feet, use three hinges.
What are ball-bearing hinges and do I need them?
Ball-bearing hinges have small bearings between the knuckles so the door swings smoothly under load for many thousands of cycles. Any door with a closer, any heavy door, and any high-traffic entrance should use them. Plain-bearing hinges wear out fast in those conditions and start to squeal and sag.
Why does my commercial door sag at the latch side?
Sag almost always starts at the top hinge, which carries the most load. Worn knuckles, loose or stripped screws, or too few hinges for the door’s weight let the top corner drop, which pushes the latch edge down. Correcting or replacing the top hinge, and re-anchoring the screws, usually brings it back.
Can a door be too heavy for its hinges?
Yes. If the hinges are undersized or the wrong weight class, or there are too few of them, a heavy door overloads them. The result is fast wear, sagging, and screws pulling out of the frame. The fix is moving to a heavier hinge grade, adding a hinge, or switching to a continuous hinge.
What holds up a fire door and can I change its hinges?
Fire door hinges are part of a labeled assembly and must be steel, with heavy-weight ball-bearing hinges on rated doors that carry a closer, per NFPA 80 and the applicable codes. You can replace them, but only with listed hardware that keeps the door within its rating. Using the wrong hinge can void the label.
What is a non-removable pin (NRP) hinge?
An NRP hinge has a set screw that locks the pin in place so it cannot be tapped out. It is used on out-swinging exterior doors, where the hinge pins are exposed outside and could otherwise be removed to lift the door off. A security stud does a similar job by interlocking the two leaves.
How long do commercial door hinges last?
It depends on the grade and the traffic. A quality heavy-weight ball-bearing hinge on a well-maintained door can last many years and hundreds of thousands of cycles. An undersized or plain-bearing hinge on a busy door with a closer can wear out in a fraction of that time. Traffic, weight, and maintenance decide it.
Can I just replace one hinge or do I need to replace all of them?
If one hinge is clearly failed and the others are sound and matched, a single replacement can work, as long as the new hinge matches the spec of the rest. On an older door where all the hinges have seen the same wear, replacing the full set keeps the door balanced and avoids a repeat call within months.
Why do my hinge screws keep coming loose?
Usually the screw holes have stripped out, the frame material is thin, or the door is overloading the hinges. Longer screws that reach solid material, a repair plate, or a move to a heavier hinge fix it. If the frame itself is failing, that has to be addressed, or the new screws will loosen again.
What are swing-clear hinges for?
Swing-clear hinges rotate the door completely out of the opening when it is open, so the door slab does not eat into the clear width. They are used where every inch of opening matters, such as accessible routes and paths where wheelchairs, stretchers, or equipment need the full frame width.
Do storefront and glass doors use the same hinges as steel doors?
No. Heavy aluminum and glass storefront doors usually ride on pivot hinges at the top and bottom, or on a continuous geared hinge, rather than three butt hinges down the edge. The weight and the frame design call for a different system, and repair or replacement is handled accordingly.
My door squeals every time it opens. Is that a hinge problem?
Most often, yes. A squeal usually means dry or worn bearings or dirt in the knuckles. Lubrication can quiet a hinge that is still in good shape, but a hinge that keeps squealing after lubrication is worn and due for replacement. Ignoring it lets the wear accelerate and the door start to sag.
How do I know whether to repair or replace my hinges?
Loose screws, a bit of dryness, or minor misalignment can often be repaired. Visibly worn knuckles, dead bearings, a bent hinge, a pin that will not stay put, or long-term sag point to replacement with a properly matched hinge. A specialist can tell you quickly which side of that line your door is on.
Do you service hinges outside Toronto?
Yes. We work with commercial properties across the Greater Toronto Area, including Mississauga, Oakville, Vaughan, Barrie, and Newmarket, on hinge replacement, door alignment, and the related frame and hardware work. Reach out with your location and the type of door and we can advise on next steps.
What else fails on a door alongside the hinges?
Hinges wear as part of a system, so a sagging door often shows up with a misaligned strike, a struggling closer, and a worn threshold or weather seal. It is worth checking the threshold, the closer, and the lock at the same time so the whole opening is set right rather than only the hinges.
Editor note (images). Three images generated with Higgsfield (marketing_studio_image, 16:9), converted to optimized JPEG (quality 82), stripped of extra metadata on re-encode, and sideloaded into the media library.
- Hero / featured: commercial-door-hinges-ball-bearing-hero.jpg, 1376×768, JPEG, ~103 KB. Title: Commercial door hinges on a hollow metal door. Alt: Heavy-duty ball-bearing commercial door hinges on a hollow metal door in a GTA office entrance. Caption: Heavy-duty ball-bearing hinges carry the weight and wear on a commercial entrance door. Prompt: professional commercial architectural photography, extreme close-up of heavy-duty stainless steel ball-bearing butt hinges on a dark bronze hollow metal commercial door within a steel frame, modern GTA office entrance blurred behind, natural daylight, no text or logos or people, 16:9. Placement: featured image.
- Inline 1: installing-full-mortise-ball-bearing-hinge.jpg, 1200×669, JPEG, ~75 KB. Title: Installing a full mortise ball-bearing hinge on a commercial door. Alt: Technician installing a full mortise ball-bearing hinge on a commercial hollow metal door. Caption: A full mortise ball-bearing hinge being fastened to a hollow metal door edge. Prompt: realistic skilled-trade photography, gloved hands using a screwdriver to fasten a full mortise ball-bearing hinge on a gray hollow metal door edge, no visible face, no text or logos, landscape. Placement: The main types of commercial door hinges section.
- Inline 2: continuous-geared-hinge-storefront-door.jpg, 1200×669, JPEG, ~75 KB. Title: Continuous geared hinge on an aluminum storefront door. Alt: Aluminum continuous geared hinge on the edge of a storefront glass door. Caption: A continuous geared hinge spreads the load along the full height of a storefront door. Prompt: realistic commercial hardware photography, close detail of a full-height aluminum continuous geared hinge on an aluminum storefront glass door edge, brushed aluminum, no text or logos or people, landscape. Placement: What size hinge do you need section.
Suggested designer graphics (AI image models are unreliable for labeled technical art): a labeled hinge-anatomy diagram (leaf, knuckle, pin, bearing), a hinge-count-by-door-height infographic, a side-by-side ball-bearing vs plain-bearing cutaway, and a 7-11 versus 5-10 hinge placement diagram.
