Author: Site Editor Publish Time: 11-08-2026 Origin: Site
Installing a commercial door hinge correctly determines how well a door operates, how long it lasts, and whether it meets fire and building code requirements. This guide covers the three most common commercial door hinge types—butt hinges, pivot hinges, and electrified pivot hinges—with step-by-step installation instructions, a pre-installation checklist, common mistakes to avoid, and guidance on when to call a professional.
Whether you're outfitting a new commercial build or replacing worn hardware, this resource gives you the technical detail needed to get the job done right the first time.
The three hinge types differ primarily in their mounting location, load distribution, and electrical capability:
Butt hinges mount on the face of the door edge and door frame using mortised cutouts (recesses). They are the most common commercial hinge type.
Pivot hinges mount at the top and bottom of the door, transferring weight through vertical pivot points rather than along the door edge. This makes them ideal for heavy or oversized doors.
Electrified pivot hinges function like standard pivot hinges but include internal wiring to pass low-voltage electrical current through the hinge—typically to power electric strikes, magnetic locks, or access control readers mounted on the door.
Choosing the wrong hinge type for a given door and frame configuration is one of the most common (and costly) commercial hardware mistakes.
Before beginning any commercial door hinge installation, gather the following tools and confirm the items on the checklist.
Tape measure and pencil
Chisel and mallet (for mortising butt hinges)
Power drill with appropriate bit set
Screwdriver (flathead and Phillips)
Hinge template or door hardware jig
Level (24" or longer recommended)
Wire stripper and voltage tester (for electrified pivots only)
Safety glasses and work gloves
Confirm door weight and dimensions against hinge load rating
Verify hinge hand (left- or right-hand swing)
Check that door and frame materials are compatible with selected hinge
Confirm fire rating requirements for the opening (UL-listed hinges required for fire-rated doors)
For electrified pivots: confirm power supply voltage and amperage before installation
Review local building codes and ADA requirements
Butt hinges are installed using a mortise-and-screw method. The door edge and the door frame (jamb) are each routed or chiseled to receive a hinge leaf flush with the surface.
Standard commercial door hinge placement is:
Top hinge: 5 inches from the top of the door to the top of the hinge
Bottom hinge: 10 inches from the finished floor to the bottom of the hinge
Middle hinge (if required): Centered between the top and bottom hinges, or positioned per door weight specifications
Use a hinge template or jig for precise, consistent placement across both the door and the frame.
Using a sharp chisel and mallet (or a router for production work), cut mortises on both the door edge and the door frame jamb. The mortise depth should match the hinge leaf thickness precisely—typically 1/8 inch for standard commercial butt hinges—so the leaf sits flush with the surface.
A leaf that sits proud (above the surface) will cause the door to bind. A leaf that sits too deep will create a gap and misalignment.
Set each hinge leaf into its mortise and mark the screw hole locations with a punch or awl. Pre-drill pilot holes to prevent wood splitting or frame damage, then secure each leaf with the provided screws. Use all screw holes—not just alternating ones—to ensure maximum holding strength under repeated use.
With the frame leaves installed, align the door leaves and insert the hinge pins. Open and close the door several times to test for binding, racking, or uneven gaps. Adjust mortise depth or shim as needed before finalizing.
Pivot hinges use a top header mount and a bottom floor or threshold mount to carry the door's full weight through vertical pivot points. This mounting method makes pivot hinges suitable for doors that are heavier, taller, or wider than standard butt hinge capacity allows.
The bottom pivot (floor pivot or base mount) is the primary load-bearing component. Install it at the centerline of the door's bottom rail, set back from the face of the door per the manufacturer's specification—typically 3/4 inch to 1 inch from the face.
Anchor the bottom pivot plate securely to the floor substrate using the specified fasteners. For concrete floors, use appropriate concrete anchors rated for the door's full weight.
The top pivot (header pivot or soffit plate) mounts in the door frame header directly above the bottom pivot. Align the top pivot precisely with the bottom pivot along the same vertical axis. Misalignment between the top and bottom pivot points—even by a small margin—will cause the door to bind or lean.
Most commercial pivot systems allow vertical adjustment of approximately 3/16 inch to fine-tune door height and gap clearance after installation.
With both pivots in place, carefully lift the door into position, engaging the top pivot pin first, then seating the bottom pivot. Check vertical alignment with a level and make adjustments using the built-in vertical adjustment mechanism.
Open and close the door through its full swing arc. Check that the door maintains consistent clearance at the head and sill throughout the swing. Pivot doors do not behave identically to butt-hung doors—the door swings both inward and outward from the pivot point, so adequate clearance on both the push and pull sides must be confirmed.
Electrified pivot hinges carry both the mechanical load of the door and low-voltage electrical current through an internal conductor. They are commonly used to power electric locks, electromagnetic holders, or access control devices on doors where running exposed wiring is impractical or not permitted.
Important: Electrified pivot hinge installation involves low-voltage electrical work. Always confirm power is off before handling wiring. Consult local electrical codes and engage a licensed electrician where required.
Before mounting any hardware, plan how power will be routed from the power supply to the electrified hinge. The wiring typically runs through the door frame, entering the hinge at a concealed location. Determine entry and exit points and confirm the conductor gauge matches the current requirements of the connected device.
Electrified pivot hinges are designed to be used in combination with a separate, load-bearing pivot—not as standalone structural pivots. The electrified middle pivot (also called an intermediate pivot) is a non-structural component that carries the wiring only.
Install the electrified pivot at the mid-height of the door, following the same positioning guidelines as a standard pivot. Ensure the wiring leads are accessible and correctly oriented before securing the mounting plates.
Install a standard heavy-duty top pivot and bottom pivot to carry the door's structural load. The load-bearing pivots handle the weight; the electrified pivot handles only the electrical pass-through. Never rely on the electrified pivot to carry the door's weight.
Route the conductors through the hinge body and connect them per the wiring diagram provided by the manufacturer. Use a voltage tester to confirm continuity before and after installation. Test the connected device (lock, holder, or reader) to verify correct operation through the full range of door movement.
Even experienced installers make errors that lead to poor door performance or premature hardware failure. The following are the most frequent mistakes seen in commercial hinge installation.
Mistake: Using too few hinges, or hinges rated below the door's actual weight.
How to avoid it: As a general rule, commercial doors require one hinge for every 30 inches of door height, with a minimum of three hinges for doors taller than 60 inches. Always confirm the hinge's rated load capacity against the door's actual weight before specifying hardware. Keyman's UL Hinges and Pivot Hinge Offset Pivots include load specifications to guide correct selection.
Mistake: Cutting mortises that are too shallow, too deep, or inconsistent in depth.
How to avoid it: Use a hinge template and router with a depth stop for consistent mortise depth. Test-fit each leaf before fastening and adjust as needed.
Mistake: Installing the top and bottom pivots on slightly different vertical axes.
How to avoid it: Use a plumb line or laser level to confirm that both pivot mounting locations are perfectly aligned before drilling. Small misalignments that appear minor during installation will amplify once the door is hung.
Mistake: Relying on the electrified pivot hinge to support the door's weight.
How to avoid it: Always use the electrified pivot as a middle, non-load-bearing component alongside a dedicated load-bearing top and bottom pivot set. Keyman's Heavy Duty Electrified Middle Pivot Hinge is designed specifically for this configuration.
Mistake: Assuming a standard hinge set is sufficient for oversized or heavy doors without checking specifications.
How to avoid it: Calculate the door's actual weight (including glass panels, fire door cores, or decorative elements) before selecting hardware. For doors exceeding standard weight thresholds, upgrade to a heavy-duty pivot system.
DIY installation is reasonable when:
The door is a standard commercial size and weight
No electrical components are involved
The installer has experience with mortise work and frame preparation
Local codes do not require licensed installation for the specific opening type
Professional installation is strongly recommended when:
The door is fire-rated (incorrect installation can void the UL listing)
Electrified hardware is involved (licensed electrician may be legally required)
The door exceeds 150 lbs or is over 96 inches tall
The project involves a high-traffic or life-safety-critical opening
The building is subject to ADA compliance review
For complex commercial projects, engaging a certified door hardware consultant or a licensed commercial hardware installer ensures code compliance and long-term performance.
Q: How many hinges does a commercial door need?
A: Most commercial doors require a minimum of three hinges. As a standard guideline, one hinge is needed for every 30 inches of door height. Heavier doors—particularly those exceeding 200 lbs—may require additional hinges or an upgrade to a pivot hinge system to distribute weight adequately.
Q: Can pivot hinges be used on fire-rated doors?
A: Yes, pivot hinges can be used on fire-rated doors, provided they carry the appropriate UL listing for the specific fire rating of the opening. Always verify that the hinge's fire rating matches or exceeds the door assembly's fire rating before installation.
Q: What is the vertical adjustment range on a commercial pivot hinge?
A: Most commercial pivot hinges offer a vertical adjustment range of approximately 3/16 inch after installation. This allows the installer to fine-tune door height and maintain consistent clearance at the head and sill without removing and repositioning the hardware.
Q: Do electrified pivot hinges work with any access control system?
A: Electrified pivot hinges are compatible with most low-voltage access control systems, including electric strikes, magnetic locks, and card readers. However, the hinge's conductor gauge and amperage rating must match the current draw of the connected device. Always confirm compatibility with both the hinge manufacturer and the access control system supplier before specifying.
Q: What is the difference between an offset pivot and a center-hung pivot?
A: An offset pivot positions the pivot point slightly offset from the door face, causing the door to swing clear of the frame on the pull side. A center-hung pivot places the pivot directly at the center of the door's thickness, creating a symmetrical swing. Offset pivots are more common in standard commercial applications; center-hung pivots are often used for heavy, frameless glass doors or double-acting door assemblies.
Keyman Lock has manufactured ANSI/UL-certified commercial door hardware since 1996. The Keyman hinge range includes:
UL Hinges — UL-listed butt-style hinges for fire-rated commercial openings
Pivot Hinge Offset Pivots — Heavy-duty pivot sets for oversized and high-traffic doors
Heavy Duty Intermediate Hand Pivot — Mid-door pivots for added support on large door assemblies
Heavy Duty Electrified Middle Pivot Hinge — Electrified pass-through pivots for access control integration
For product specifications, load ratings, or custom hardware inquiries, contact the Keyman team directly.
