Door hardware determines whether an access-control decision becomes reliable physical security. The reader identifies a credential, the controller applies a rule, and the opening must then unlock, close, latch and permit the required egress. This reference explains the main hardware options and the records needed to choose them for commercial properties in Pennsylvania and the Mid-Atlantic.
Begin with the condition and function of the complete opening. A reader cannot repair a dragging door, misaligned frame, failed closer or unsuitable exit device. The actual assembly, occupancy and adopted requirements govern the design; hardware must be selected and installed within its listing and manufacturer instructions.
Compare the main locking options
| Option | What it changes | Useful evaluation context | Key limitations and checks |
|---|---|---|---|
| Electric strike | Releases the frame-side keeper to allow entry while working with a compatible latch. | Retrofits retaining suitable mechanical door hardware. | Latch geometry, frame preparation, preload, voltage, monitoring and fire-door suitability. Egress depends on the complete lock arrangement. |
| Electrified cylindrical or mortise lock | Controls the entry-side lever or locking function within the door. | Openings needing conventional lock operation and electronic entry control. | Correct lock function, mechanical egress, power transfer, door preparation and compatible monitoring. |
| Electrified exit-device trim | Controls exterior entry while the exit device provides its designed inside operation. | Doors with compatible panic or fire-exit hardware. | Exact trim/device compatibility, listing, door handing and power path. Do not assume all trim functions behave alike. |
| Electric latch retraction | Retracts the latch of a compatible exit device for authorized opening or an approved operating sequence. | Entrances coordinated with automatic operators or scheduled access. | Inrush current, power supply, timing, listed configuration and fire-door relatching requirements. |
| Magnetic lock | Uses energized magnetic attraction to secure the opening. | Only openings where a permitted release arrangement can be designed and approved. | Loss of magnet power releases the magnet. Required release devices and interfaces depend on the applicable arrangement; a reader and magnet alone are not a complete design. |
| Wireless electronic lock | Combines electronic control at the opening with battery power and supported communications. | Suitable interior doors where cable work is difficult or disruptive. | Battery maintenance, coverage, permission-update timing, event latency, mechanical override and exact platform support. |
| Motorized or specialty locking hardware | Provides a defined locking or movement function for a particular opening. | Special doors and approved applications with a documented sequence. | Product-specific listing, mechanical behavior, emergency operation and maintainability require individual review. |
For terminology and opening functions, consult Allegion’s door hardware education. For examples of separate strike, magnetic-lock and power-supply families, see ASSA ABLOY’s hardware reference. These are product references, not blanket approvals for a particular building.
Fail safe, fail secure and free egress
Fail safe and fail secure describe the secure-side response of an electrified locking device when its electrical power is removed. They do not, by themselves, describe how a person exits. A correctly selected fail-secure electromechanical lock can retain mechanical egress from inside. A magnetic lock releases when its power is removed, but the complete opening still needs the required release arrangement.
Do not write “all access-controlled doors unlock on a fire alarm” as a universal rule. The required response depends on the locking arrangement and applicable requirements. Fire-rated assemblies also need their required closing and latching functions. See Allegion’s explanation of fail-safe and fail-secure operation, then have the project team document the approved sequence for each opening.
Survey the whole opening
- Identity: unique door number, location, use, owner and responsible tenant.
- Construction: door and frame material, handing, dimensions, glazing, existing preparations and labels.
- Mechanical operation: hinges or pivots, closer, latch alignment, threshold, seals and condition under normal use.
- Existing hardware: lock function, exit device, trim, keying, automatic operator and any hold-open equipment.
- Life safety: fire-rated assembly, required egress path, accessibility needs and proposed emergency interfaces.
- Infrastructure: cable route, power supply, secure controller location, network and service access.
- Environment: exposure to rain, salt, dust, temperature, washdown, impact or corrosive conditions.
Photographs should show the complete opening and relevant hardware details. Record problems before attributing an intermittent failure to the electronic system. Door alignment and pressure differences can change how a strike or latch behaves.
Supporting hardware is part of the design
Closers, hinges and latching
The door must close and latch reliably under the expected operating conditions. An access event is not proof that the door secured afterward. Check the opening with normal air pressure, seals and traffic conditions. Changes to closers, hinges or fire-door preparations must be coordinated with the responsible hardware professional.
Power transfer and cable protection
Door-mounted hardware needs an appropriate pathway through the moving opening, such as a compatible electrified hinge or listed transfer device. The selection depends on conductor needs, movement, door construction and the hardware instructions. Exposed loops need suitable protection and should not create snag or maintenance problems. Identify all terminations and leave an accurate cable schedule.
Power supplies and standby power
Calculate the actual operating and inrush loads, voltage drop, controller requirements and standby duration. A relay’s contact rating is not a power-supply rating. PoE availability does not establish that a particular controller can power every connected lock. Coordinate batteries, chargers, supervision and any fire-alarm interface with the approved design. Retain the calculation and the tested result.
Door contacts, latch monitoring and request to exit
A door-position contact reports whether the door is open or closed; it does not necessarily prove the latch is engaged. Latch or lock-status monitoring reports a different condition. A request-to-exit input may be used for event handling or an approved unlocking sequence, depending on the arrangement. Label these signals accurately so operators do not mistake “door closed” for “door secured.”
Special opening conditions
Pairs of doors
Document both leaves, active/inactive operation, coordinators, flush bolts, mullions and exit devices. Determine which leaf provides authorized entry and which leaves must be available for egress. Do not assume the single-door detail can be copied to a pair.
Fire-rated doors
Verify labels and the compatibility of the complete assembly. Field preparation, hardware substitutions and electronic dogging or latch-retraction behavior may affect the listed arrangement. Preserve required positive latching and closing behavior through the approved sequence. Uncertain existing conditions need qualified review rather than a generic hardware substitution.
Automatic operators and accessible entrances
Coordinate credential acceptance, unlocking, operator activation, door movement, dwell time and relocking. The accessible route must work for the intended users during normal and required emergency conditions. A successful reader beep does not prove that the operator sequence is usable. Test the actual door with the responsible accessibility and hardware team.
Exterior doors, gates and industrial openings
Check weather ratings, corrosion resistance, cable exposure, traffic patterns and physical protection. Vehicle gates and powered equipment introduce separate operator and entrapment-safety requirements; access authorization does not replace the gate’s safety system. Pedestrian and vehicle circulation should be planned separately.
Write an opening sequence before installation
For every door, describe the starting state, triggering event, expected hardware action, event record and return to normal. Include valid entry, denied entry, authorized egress, door held open, forced opening, scheduled operation, communications loss, power loss and any applicable emergency interface. Identify which behavior is mechanical, which is local to the controller and which depends on software or communications.
For example, a conventional credential-controlled office entry may release compatible entry hardware for an authorized credential while preserving its specified inside egress function. After use, the closer returns the door and the latch re-engages. The test must confirm the entire sequence, including a door that is held open. This example does not define the correct arrangement for a fire door, magnetic lock, healthcare controlled-egress door or other special application.
Hardware record and acceptance checklist
| Record | Information to retain |
|---|---|
| Door schedule | Door ID, function, rating, handing, existing condition and approved hardware set. |
| Equipment | Manufacturer, exact model, function, voltage, load, finish, listing and approved substitutions. |
| Connections | Cable IDs, terminals, controller I/O, power supply and interface references. |
| Sequence | Normal, outage, emergency and restoration behavior with responsible approvals. |
| Commissioning | Witnessed results, deficiencies, corrective action and retest date. |
| Maintenance | Inspection procedure, battery responsibilities, spare parts and change history. |
- Verify mechanical closing and latching before electrical tests.
- Check authorized entry, denied entry and required egress using the installed hardware.
- Confirm door-position and lock-status events match the physical conditions.
- Test the approved outage and emergency sequences with the responsible parties.
- Verify accessible and automatic-door operation where applicable.
- Resolve deficiencies and retain as-built records before final acceptance.
Continue planning
Use the complete system planning guide, manufacturer comparison, commissioning and maintenance guide, and regional planning directory. Hardware selection and code review must use the actual building and opening conditions.
Publisher’s related applied reference: magnetic-lock hardware and egress.