Highlights

  • Test Standards: BS EN 12101-1, BS EN 1634-1 and BS EN 1634-3, UL 10 D & DS, Can be provided with UL 1784 and NFPA 105 compliant models for smoke leakage.
  • Fire Resistance: Up to 1 hours at 1000 degrees (UL 10D) and 2 hours at 600 degrees (BS EN 12101-1)
  • Fire Insulation: N/A
  • Operation: Motorized
  • Min. Box Size: 150mm (d) x 150mm (h) - motor is within the box
  • Max. Curtain Size: Contact us
  • Activation: Fire Alarm Signal
  • Finishes: Steel components are powder-coated, fabric color is grey.

Scenarios where Smoke Curtains are used

Elevator / Smoke Stop Lobbies

Sometimes a protected lobby needs to be created in from of a bank of elevator doors. In the absence of curtains, this would have required the designers to incorporate a physical fire and smoke compartment to be built. Using curtains however, you can create an open lobby design as the curtains will deploy to create a smoke sealed partition where and when it is required.

 

Atrium Chimney

Shopping centers, hotels, office buildings and most new projects these days have large open atria spanning many floors. To prevent the spread of smoke and fire from one floor to the other and to facilitate the rapid extraction of smoke, many of these use a roof level access system complemented by an inlet make up air facility. The perimeter of the floors overlooking the atria are protected by curtains that deploy to ensure that smoke and hot gases can be channeled directly up the atria.

 

Smoke Compartmentalization and Channeling

Smoke compartments are formed to prevent the spread of smoke and hot gases throughout a building as they can cause chaos, cause bodily harm and block view of vital exits. The curtains forming these compartments need to be impermeable to smoke leakage within a set criteria and also offer a high level of resistance to heat. Smoke channels can also be designed in conjunction with large extraction systems to direct smoke into zones.

 

Escalators and Stairs

Both of these create a permanent breach in the compartment between floors. Using smoke curtains around the lower level creates a deep reservoir depth to prevent or slow down the smoke and gases from flowing  to the upper stories.

 

Construction and Operation

Basic Components

1) Roller - The fire curtain fabric is wound onto the roller which remains completely enclosed by the head box.

2) Headbox - The rollers and motors come fully enclosed in a small head box profile (made from 1.2mm thick steel) starting from 150mm x 150mm, making them compact and convenient.

3) Fabric - Weighing approx. 435g/m2, this glass cloth is coated with a micronized aluminum coating and stitched together using stainless steel thread. This high tensile fabric has excellent heat resistance and low smoke permeability.

4) Bottom bar - Aluminum extruded angles encased in a polycarbonate cover that is finished to suit the aesthetics of the false ceiling.

Normal Storage

Under normal conditions, the curtain remains retracted in the compact head box installed above the false ceiling. It is held in place by an extra low voltage supply with the bottom bar resting against the underside of the headbox or below the box depending on the application.

Curtain Activation

1) Via the fire alarm signal
2) Via other detection systems like heat / smoke detectors
3) During a power outage (a back up battery will hold the curtain in position for 60 minutes before it descends)
4) Turning the test key switch for regular safety testing

Curtain Descent

The group control panel (GCP) removes the power supply to the motor control circuit (MCC) and the extra low voltage to the motor is suspended. Since the brake has been released, the weight of the bottom bar pulls the curtain down to its operational position. When the signal is reset, the GCP restores power to the MCC which retracts the curtain up and back to its normal position.

True Gravity Fail Safe

Our Gravity Fail Safe ensures that under any scenario, the curtain will descend by gravity. The curtain does not fall like a guillotine but descends at a controlled and constant. This is because the voltage generated by the rotating motor feeds the electronic speed monitoring system which ensures that the speed is within safe limits as set by International Standards.


SINGLE BARREL ASSEMBLY (UP TO 5.5M WIDTH)

Maximum recommended span width for a single roller is 5.5m. Larger widths use multiple roller assemblies with overlapped curtains and a conjoined bottom bar.

 

MULTIPLE BARREL ASSEMBLY (LONGER THAN 5.5M WIDTH)

We can achieve unlimited widths by overlapping the curtains via a multiple barrel assembly. No intermediate posts are needed. The overlapped curtains descend together and shared a conjoined bottom bar.


Overview

The Automatic Smoke Curtain consists of fire resistant fabric curtain mounted on a steel roller and powered by an internal, electric, tubular geared motor. All working parts are totally enclosed and protected within the steel roller. The complete system is tested for true fire resistance, and controlled gravity fail-safe on total power failure which is not reliant on secondary power supply.

Certifications & Documentation

Ferco’s Smoke Curtain has full testing and certification to BS EN 12101-1, BS EN 1634-1, 1634-3, UL 10 D & DS. We can provide models that are compliant with smoke leakage standards set out in UL 1784, NFPA 105, BS EN 1634-3. 

Fabric

Fabric is woven with glass threads in grey color and tested as part of the complete assembly with OVERLAPPED  and CONJOINED curtains in the orientation and standard use of their application and installation comply with the requirements of the FR test for BS EN12101-1 and BS7346 Part 3 1990. In addition, fabric achieves 60 minutes integrity at a 1000 C according to the time temperature curve of BS476 Part 20 1987 and UL 10D, Weighs about 470 grams / m2 and fabric meets the requirements for Fire Propagation of BS476 Part 6 1989 and has Nil spread of Flame, achieving Class 1 according to BS476 part 7 1987.

A special panama weave provides 10% more tensile strength than competitors which means we can provide larger sizes in safer systems. An aluminized coating protects the fabric, improves performance and ensures longevity.

Operation

Under normal conditions the curtain is retracted in the head box and is held in position by an extra low voltage supply from the semi conductor regulator in the motor control circuit (MCC). The bottom bar will be resting against the underside of the box or below the box if a stopping bar is installed, the stopping bar will then rest against the box. In the event of a fire condition or operation of the test key switch, the group control panel removes the power to the MCC’s and the extra low voltage supply to the motor is isolated. The curtain descends by using the weight of the bottom bar to rotate the tube and deploy the fabric at a controlled rate. Ferco’s Smoke Curtain operates with mains power and is also operable with emergency power source. If both mains and emergency power fail, the system will descend, under gravity with a controlled rate of descent after a time delay of 60 minutes, as a safety feature to avoid dangerous guillotine/fall descent. The system is operated by alarm / control signal and / or specified fail-safe functions

Construction

The steel roller. Complete with internal tubular motor, curtain, bottom bar and all associated fittings, is fully enclosed within a 1.2mm galvanized mild steel box. Motor contains the gearbox, braking system and drive mechanism. Curtains are contained within 1.2mm galvanized mild steel boxes whose end plates are brackets are made of minimum 2mm galvanized mild steel.
Multiple units will have rollers overlapping (400mm) one over the other. The fabric on the upper roller will descend immediately adjacent to the fabric on the lower roller,  and both fabrics would be linked with a conjoined bottom bar. All operating speeds are fully adjustable to ensure synchronization of units with conjoined bottom bar.

M&E Requirements

Power

230V, single phase, 50Hz, 13A power supply 

Fire Alarm Signal

24V DC, 400mA, normally closed fire alarm signal.

Options

  1. Audio / visual alarms
  2. Monitoring the fire curtain through a BMS system or remotely with dedicated monitors.
  3. Powder-coated bottom bar and guide rails.
  4. Emergency Retract Buttons
  5. Oversize certification
  6. Fire alarm override facility

Controls

Ferco’s Fire Curtain operates through Group Control Panel (GCP) located adjacent to the units with the Main Fire Alarm Panel (MFAP), Motor Control Panel/s (MCP) located adjacent to motors, have appropriate access panels. The system is fully protected and failsafe to avoid fire rated cabling. In case of temporary power interruption, curtain will be in raised position for a time duration of 60 minutes, after which the curtain will descend if power is not returned. GCP has audio and visual power failure warning system as an optional which is operable with both mains and emergency power. Optional facility is available for partial descent to predetermined position – delay- followed by full descent (applicable for full power failure).