Why Lockdown And Fire Egress Clash — And How A Logic Matrix Resolves It
Imagine a secondary school: an intruder lockdown is declared while a kitchen fire trips the alarm. Staff must keep pupils safe without locking them into a burning corridor. If you manage facilities, security or estate planning, this article gives a practical route map — what to record for every door, wiring priorities, and the tests you must run to prove it works.
In our experience, ambiguity in door behaviour creates the biggest risk. A door logic matrix removes that guesswork by stating exactly how each door behaves in Normal, Fire, Lockdown, Power Loss and Local Override. Read on for practitioner tips, a compact checklist and wiring priorities you can use at your next stakeholder workshop.
Also useful: align access control with fire strategy and choose locks after reading fail-safe vs fail-secure emergency egress.
Core Principles: Fail-Safe, Fail-Secure And Life Safety First
Fail-safe hardware unlocks on power loss; fail-secure stays locked. Life safety must always override security. If you’re in the UK, ensure the matrix forces fire alarm release to take precedence over lockdown and normal modes.
A common issue we see is relying on a single device to do two jobs. Pair lock type with escape hardware and documented override paths so mechanical egress is always available where needed.
The Components That Set Door Behaviour
Operators, controllers, locks, panic hardware, request-to-exit devices, fire interfaces and PSUs all affect behaviour. In practice, maglocks, strikes and operators behave differently on alarm and on power loss, and your wiring must reflect that.
For typical operator and safety layouts used in mixed-use entrances, see our guidance on automatic swing doors.
This image was generated with AI and may not always represent the product or service exactly.
The Entrance Logic Matrix: What To Record
At minimum record: door ID/location, door type, escape-route status, lock and operator type, inputs (fire, lockdown, RTE), and explicit behaviour for Normal, Fire, Lockdown, Power Loss and Local Override. Specify who can override, and what alarms and indicators activate.
Set a clear hierarchy: Fire > Life Safety Inputs > Lockdown > Normal. Label devices and include reference wiring diagrams so technicians and fire contractors can verify the implementation.
See practical priority wiring for alarms and doors in our fire alarm integration with automated doors guidance.
Step-By-Step: Build Your Door-By-Door Matrix
1) Walk the building and map every door and escape route. 2) Confirm the building’s fire strategy and lockdown policy with stakeholders. 3) Choose locks and operators to match route function and DDA needs. 4) Define behaviour for all events and overrides. 5) Simulate scenarios and witness test with contractors. 6) Finalise the matrix and train staff.
Keep drawings, wiring schedules and device datasheets with the matrix so any change triggers a formal review.
Quick Checklist
- Door ID, route class and final exit status
- Lock and operator type with fail mode noted
- Inputs: fire, lockdown, RTE, local override
- Override authority and labelling
- Commissioning witness test and sign-off
What Most People Get Wrong
Most teams assume a single unlock action equals safety. In practice, unlocking without controlled egress, signage and verified emergency routes simply shifts risk. Document behaviour, not intentions.
When This Doesn’t Apply
Very small premises with a single open-plan escape may not need a complex matrix, but you still must document who does what on alarm and power loss. The matrix is scaled to complexity, not size.
Door Type Rulesets: Practical Examples
Exterior automatic sliding or swing doors typically use fail-safe maglocks that release on alarm and power loss, combined with DDA-compliant timings and touchless entry where required.
Corridor fire doors use hold-open magnets tied to the fire alarm so they release and close on alarm. High-security rooms may be fail-secure with mechanical egress; these require clear documented overrides and monitored escape paths.
Sector Scenarios: Schools, Healthcare, Offices And Industrial
Schools: zone lockdowns that keep corridors secure while classrooms allow free egress. Ensure staff have local key overrides and training. Healthcare: balance touchless activation with controlled releases and check delayed egress only after risk assessment. Offices and industry: link turnstiles and machinery interlocks so fire alarms and emergency stops always prioritise safe egress.
This image was generated with AI and may not always represent the product or service exactly.
Control Wiring And Integrations That Work In Practice
Use supervised PSUs with battery backup and monitored outputs. Fit a fire relay that drops power to fail-safe devices on alarm while providing a separate controller input for lockdown. Label release devices and test monitored outputs regularly.
A common practical fix is separating the fire-release circuit from the security unlock circuit so a single fault cannot compromise both functions.
Compliance, Accessibility And User Flow
Follow BS EN 16005 for forces, speeds and sensor coverage and design for inclusive access under the Equality Act. Document how each door remains accessible during lockdown and power loss and include alternative routes for mobility-impaired users in the matrix.
For commissioning and safety checks, use our BS EN 16005 automatic door safety audit checklist to confirm operating speeds and detection fields.
Maintenance, Testing And Documentation
Do weekly fire-release checks and keep logs. Run lockdown drills termly or quarterly depending on risk. Service automated doors at least annually or per usage and record each activity in the handover pack.
Hold a handover pack with the matrix, drawings, wiring schedules, device datasheets and training records. Use change control so any alteration triggers a matrix review.
Implementing Your Matrix With Access Automation
Access Automation begins with a site assessment and stakeholder workshop, drafts the matrix, selects hardware, and then installs and commissions. We witness tests with your fire alarm contractor and provide training and clear documentation.
If you need integrated solutions, talk to us about commercial access control that follows the matrix from day one.
FAQs
How Do I Choose Fail-Safe Or Fail-Secure For Each Door?
Match the lock mode to the door’s route class and escape function. Use fail-safe on escape and final exit routes; consider fail-secure for low-occupancy secure rooms only if mechanical egress and monitored overrides are provided.
Who Needs To Sign Off The Matrix?
Sign-off should include facilities, fire strategy lead, security and the installing contractor. Keep the signed matrix with drawings and wiring schedules.
How Often Should We Test Door Releases And Lockdown?
Weekly checks for fire-release devices and quarterly or termly drills for lockdown scenarios, adjusted to your risk assessment and occupancy patterns. Record and act on failures immediately.
Can Touchless Entry Be Used During Lockdown?
Yes. Controllers can enable or disable touchless sensors per state so entry can be restricted while safe egress remains available.
How Long Does A Retrofit Typically Take?
Times vary by building complexity. Small sites can be done in days; larger, multi-zone buildings need staged workshops, installation and witness testing over weeks. Always schedule commissioning with your fire alarm contractor.