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Lateral Fire Shutter: Main Structure & Special‑Purpose Construction for Large‑Span Application

Unlike vertical shutters closing by gravity, lateral fire shutters achieve horizontal closure via travelling carriages, horizontal guide rails and energy‑storage mechanisms. Anti‑deformation, anti‑derailment and sealing are core control points for large‑span conditions.

Ⅰ.Shutter Curtain System

For large spans, priority shall be given to Class‑A insulated super inorganic composite double‑track‑double‑curtain with fire resistance EI 2.00 h / EI 3.00 h. Steel‑wire mesh reinforcement improves tensile strength; staggered joints prevent smoke penetration under high temperature. Steel lateral shutters apply to non‑occupancy zones requiring only fire integrity, and shall be equipped with water‑spray protection.

Ⅱ.Guide Rails & Travelling Mechanism (Key for Large‑Span)

Reinforced galvanized steel guide rails with anti‑derailment flanges avoid curtain disengagement induced by wind pressure and thermal deformation.

Increase curtain‑embedding depth of guide rails with opening width to reduce smoke‑fire leakage.

Dense embedded fasteners; bolt spacing ≤ 200 mm for large spans to enhance rigidity and restrain thermal distortion.

Tune synchronization for dual‑opening travelling assemblies to prevent closure misalignment and excessive gaps..

Ⅲ.Passive Energy‑Storage Closing Mechanism

Lateral shutters cannot close by gravity; spring‑powered energy‑storage units are mandatory. Springs are compressed and charged during motor‑driven opening. Upon fire trigger, the locking assembly releases, and spring thrust drives horizontal curtain closure. Equipped with 73 ℃±0.5 ℃ fusible link for power‑free actuation, independent of power supply or fire‑alarm signals. Manual emergency release cables on both sides enable mechanical unlocking and on‑site shutdown under power failure.

Ⅳ.How does sprocket size affect torque?

The standard of sprockets can be determined according to different application requirements. The difference between metric sprockets and sprockets built to ANSI standards is that they use different units of measurement for chain specifications.

Ⅴ.Sealing System

Fire‑expandable sealing strips are fitted at side, end and bottom positions to fill gaps under fire exposure. Joints between guide rails, housing and walls are tightly filled with fire‑stop materials to limit smoke leakage.

Product Features & Application Scenarios of Lateral Fire Shutter

Core Advantages

‑ Suitable for large‑span openings; single unit provides fire separation for openings from tens of meters, available in dual‑direction bi‑parting closure.

‑ No vertical overhead space required. Ideal for steel‑structure workshops, atriums, transport hubs, logistics warehouses and large vehicle passages.

‑ Super Class‑A insulated models satisfy both fire integrity and insulation (EI) requirements, no additional water curtain needed.

‑ Three closing modes: electric fire‑alarm linkage, temperature‑triggered passive closing, and local manual release. Ensures fire safety backup during power‑off or fire‑control panel failure.

Applicable & Restricted Conditions

✅ Applicable: Fire separation for atriums, extra‑large workshop passages, long vehicle openings in underground garages, large‑equipment openings and irregular corner openings.

❌ Not suitable for primary personnel evacuation exits. Where installed on heavily‑used evacuation routes, two‑step‑down linkage logic and on‑site warning signs are mandatory.

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Horizontally‑translating Fire Shutter

Lateral Fire Shutter: Main Structure & Special‑Purpose Construction for Large‑Span Application

Product Features & Application Scenarios of Lateral Fire Shutter

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