Fire Detection around Escalators and Moving Walkways
Escalators and moving walkways do something a wall never does: they leave a permanent hole between floors. Convenient for people, that opening is also a ready path for smoke to climb from one level to the next. Around these openings, detection and the wider fire strategy have to reckon with vertical smoke spread — and much of the response sits with specialists, not the fire alarm alone. This guide covers how detection around escalators and moving walkways is approached and where the engineer's part lies.
The central point is that escalators and moving walkways create openings that can spread smoke between floors, so detection and the fire strategy must account for them, coordinated with specialist measures.
Who this is for
This is for competent fire alarm engineers working around escalators, moving walkways and similar floor openings. The experience level assumed is competent engineer. Use it for the principles; the fire alarm's detection around these areas follows the fire risk assessment and BS 5839-1, coordinated with any smoke-control measures, which are a specialist matter. The engineer provides detection and proven interfaces, not the design of the smoke-control or separation strategy.
Openings between floors
Escalators and moving walkways create openings between floors, which can let smoke spread vertically between levels, so the openings and the areas around them are a genuine consideration for detection and the fire strategy. How such openings are protected — by detection, by smoke control, by separation, or by a combination — is part of the building's fire strategy rather than a fire alarm decision alone. The fire alarm's detection around these areas follows the fire risk assessment and BS 5839-1, coordinated with any smoke-control measures. The starting point is recognising the opening as a route smoke can take, which shapes both detection and the wider strategy around it.
Managing smoke spread
Because openings between floors can let smoke pass upward, buildings may rely on smoke-control or separation measures around escalators and similar openings, and detection may interface with those measures. The management of smoke spread through these openings is a fire strategy and smoke-control matter beyond the fire alarm alone — it is about keeping levels usable and escape routes clear. The fire alarm's part is its detection and any interface to those measures, following BS 5839-1 and the cause and effect, coordinated with the smoke-control design where it applies and actuation following BS 7273-4 where relevant. The alarm supports the strategy; it does not constitute it.
Where the engineer's remit sits
It helps to be clear about the boundary. The strategy for protecting openings between floors — smoke control, separation or other measures — is a fire strategy and specialist matter, not the fire alarm engineer's to design. The fire alarm's role is detection in the relevant areas and any agreed interface to the smoke-control or separation measures. From field experience, the useful contribution an engineer makes is ensuring detection genuinely accounts for the opening and that interfaces are actually proven, while flagging anything about the wider measures for the specialists. The engineer coordinates with, rather than owns, the strategy, working within BS 5839-1 and the cause and effect.
Servicing detection around openings
On service, detection around these openings deserves a deliberate look, along with any interfaces. Confirm detection around escalators and openings suits the layout, that any interface to smoke-control or separation measures works per the cause and effect, and that changes to the openings or their surroundings have been considered. From field experience, detection that does not account for the openings, and interfaces never fully proven, are the recurring findings. Record what you find, and flag anything beyond the fire alarm — the smoke-control or separation measures themselves — for the building's specialists rather than judging them yourself.
Common points to check
Recurring issues include detection not accounting for floor openings, interfaces to smoke-control or separation measures not proven, and changes around the openings not considered. Confirming detection suits the openings and interfaces are proven is the essential check.
When not to rely on this alone
When not to use this article: do not use it to design smoke control or separation around floor openings. Those are fire strategy and specialist matters; the fire alarm's detection and interfaces follow BS 5839-1 and BS 7273-4 where relevant, applied by competent professionals.
Relevant standards
Detection and any interface sit within BS 5839-1, a code of practice, with actuation following BS 7273-4 where relevant, coordinated with the smoke-control and fire strategy. The legal duty for fire precautions in most relevant premises sits under the Regulatory Reform (Fire Safety) Order 2005. Separate the legal duty from the recommended methods, and always work to current editions.
Professional disclaimer
This is an educational and workflow resource for competent engineers and does not replace the current British Standards, the fire strategy, the smoke-control design, or competent judgement. Verify detection and interfaces around openings against current documentation.
Related documentation
Use this with the current BS 5839-1 and BS 7273-4, the fire risk assessment and fire strategy, and any smoke-control design. Record detection and interfaces around escalators and openings, and refer smoke-control and separation measures to the appropriate specialists.