Mall Smoke Control: 7 Checks for Atrium Projects

A smoke curtain can be correctly manufactured and still sit in the wrong place for the atrium smoke calculation.

This project guide connects smoke-reservoir geometry with extraction, make-up air, escape routes and tenant-change control.

Shopping Malls Create a Smoke-Movement Problem

Large malls combine open atria, multiple levels, interconnected shopfronts and changing tenant layouts. Smoke can rise through the atrium and spread laterally beneath roofs or balcony soffits before extraction reaches a stable condition. The design task is therefore to define smoke reservoirs, limit spill between zones and preserve tenable escape routes for the period assumed by the fire strategy.

Smoke curtains help form reservoir boundaries. They do not replace extraction calculations or make-up air design. A barrier that is too shallow, interrupted by a sign or placed on the wrong side of an extract point may not support the intended flow pattern even if the product itself has valid evidence.

Tenant Fit-Out Is Part of Fire-Safety Governance

Mall systems are exposed to continuous change. New kiosks, bulkheads, digital screens, sprinkler branches and decorative ceilings can enter a curtain drop zone or alter a reservoir boundary. The landlord’s technical rules should identify protected zones, require coordinated drawings and include a fire-strategy review before fit-out approval.

Acceptance testing should use realistic sequences, including occupied-mode controls, alarm zoning, fan start-up, curtain deployment and status feedback. A repeatable test record gives facility teams a baseline for future inspections and makes it easier to detect when later changes have compromised the original design.

Seven Questions for the Atrium Workshop

Ask where each smoke reservoir begins and ends; what design fire and clear-layer objective support it; where extract and replacement air enter; whether balcony spill is considered; which curtains are fixed or deployable; what happens during power loss; and how tenant changes are controlled. If the team cannot answer these questions on one coordinated drawing, the package is not ready for procurement.

Deployment timing deserves particular attention. A curtain may need to reach its design position before the smoke layer descends, but its movement must not create an unmanaged hazard for occupants. Control logic, audible or visual warnings where required by the strategy, fail-safe behaviour and status monitoring should be documented rather than left to default factory settings.

After installation, test more than the curtain. Initiate the relevant alarm zone, observe barrier deployment, verify fan and damper states, confirm replacement-air paths and record panel feedback. Repeat representative scenarios after major fit-out work. The result should be a traceable record linked to the zone and approved cause-and-effect matrix.

What a Useful Technical Enquiry Contains

A useful enquiry identifies the project country and authority, building use, opening schedule, plans and sections, required classification and duration, mounting substrate, ceiling constraints, control cause-and-effect and programme. Include the relevant specification clauses and any preferred evidence format. This information allows the manufacturer to flag application limits, interface risks and missing decisions before price becomes the only comparison. If requirements are still being developed, mark assumptions clearly and assign the design team to confirm them; a supplier proposal should not silently become the project fire strategy. State whether installation, access equipment, power wiring, alarm interfaces, commissioning, witness testing and operator training belong to the curtain package so quotations remain technically comparable.

Coordinate the Reservoir Before the Ceiling Is Frozen

Show every reservoir edge, barrier drop, extract point and replacement-air path on coordinated drawings. Use the smoke curtain system as one component of the engineered strategy, not as a substitute for it.

Specifier and Project-Team Checklist

• Record the adopted code basis, authority requirements and project-specific fire-strategy objective before selecting a product.
• Define the required classification, duration, dimensions and field of application for every curtain location.
• Coordinate structure, head-box space, guides, finishes, services, power, controls and safe maintenance access on shared drawings.
• Verify that test and classification evidence covers the proposed assembly rather than a similar marketing name.
• Write the alarm, power-loss, manual-control, delay, reset and status-feedback logic into the cause-and-effect matrix.
• Witness integrated tests, close deviations and hand over as-built drawings, evidence, test records and maintenance instructions.

Common Coordination Mistakes

Treating a catalogue as the design

Product literature can describe a system, but it does not establish the project objective, authority acceptance or application limits.

Reviewing disciplines in isolation

A curtain package touches architecture, structure, electrical controls, fire alarm, smoke control and operations. Late coordination creates avoidable risk.

Accepting evidence by headline only

A test duration or certification logo must be traced to the exact assembly, classification, dimensions and installation arrangement.

Official References and Currency Note

A catalogue statement is not a project approval. Confirm the adopted code, the current standard edition, the approved fire strategy and the exact scope of the product evidence.

• BSI — BS EN 12101-1 smoke barriers
• NFPA — NFPA 92 Smoke Control Systems
• ISO — Smoke and heat control committee

This article is general technical guidance, not a project-specific compliance decision. The authority having jurisdiction, appointed fire engineer, approved fire strategy and current product evidence govern the final design.

Frequently Asked Questions