Fire Curtains

Automatic Fire Curtains — BÖLDT FC-A240

Compartmentation on Demand, Invisible Until Needed

EN 1634-1EN 13501-2TÜV SÜD VERIFIEDGRAVITY FAIL-SAFE
BÖLDT automatic fire curtain deployed across an opening

Overview

Concealed Until the Moment It's Needed

Engineered to EN 1634-1 / EN 12101-1 · Manufactured in Jaipur

Automatic fire curtains remain fully concealed within a powder-coated steel head box, preserving open-plan sightlines, daylight and architectural intent in atriums, malls, offices and large-volume spaces. On receipt of a signal from the building's fire alarm system — or on loss of mains power — the curtain fabric descends under gravity along steel side guides to form a continuous fire-resistant barrier across the opening, with no reliance on compressed air, springs or standby power for deployment.

How It Works

BÖLDT Fail-Safe Descent

  • Fabric is wound onto a barrel within the head box, held in the open position by an electromagnetic brake
  • On a fire alarm signal or loss of power, the brake releases and the Fail-Safe Descent mechanism deploys the curtain under its own weight
  • Side guide channels maintain alignment and seal across the full height of the opening
  • A weighted bottom bar ensures the curtain seats firmly against the floor on full deployment

Application

Where This Curtain is Specified

Atrium voids in shopping malls and office towers, open-plan retail floor plates that span fire compartment boundaries, reception and lobby areas connecting multiple fire zones, and any large opening where a fixed wall or door would compromise the architectural design intent of the space.

System Components

Four components, one tested assembly

Project widthConcealed head boxPowder-coated steelFire-resistant fabricGlass-fibre compositeSteel side guideFull-height channelWeighted bottom barSeats to floor
FIG. 02Assembly components — deployed elevationBÖLDT · Not to scale

Full Specification

FabricFire-resistant glass-fibre composite
Head boxConcealed, powder-coated steel
DeploymentAutomatic on fire alarm signal
Closure mechanismGravity fail-safe
Side guidesSteel channel, full height
Bottom barSteel, weighted
Max widthProject-specific, multi-bay capable
Fire ratingUp to 240 minutes
Test standardEN 1634-1
CertificationTÜV SÜD verified
Power dependencyNone for closure
ClassificationEN 13501-2

How It Deploys

Gravity fail-safe deployment

01

Standby

Fabric concealed in the head box; opening clear during normal use.

02

Deployment

On alarm or power loss, the curtain descends under gravity along steel guides.

03

Sealed

Weighted bottom bar seats to the floor, forming a continuous fire barrier.

FIG. 01Gravity fail-safe deployment sequenceBÖLDT · Not to scale

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