An electrically operated active fire curtain barrier assembly used to form a virtually continuous barrier as a fire-separating element.
Active fire curtain barrier assemblies which comprise of a fire resistant fabric which is wound onto a steel roller, with 1:600 deflection performance to BS 6323-5, powered by an internal electric motor. They are enclosed within a 1.2 mm (0.047 inches) galvanized carbon steel box. A bottom bar to suit the deflection performance requirements of the project and the desired ceiling configuration is fitted to the bottom edge of the fabric curtain.
Barrier assemblies are required to meet the requirements of BSI PAS 121 (where appropriate) and be tested for impact to BS EN 949, and BS 5234-2 to 'double' the severe duty, be tested for controlled speeds in all modes including fail-safe by gravity on total power failure (must not be reliant on secondary power supplies to provide the ‘braking effect’), be tested for self-closing and mechanical resistance to BS EN 12605, be tested for fire resistance to BS EN 1634-1 (BS EN 1363-1 and -2), be classified to BS EN 13501-2 and be tested for smoke leakage to BS EN 1634-3.
Operation commences to their fire operational position in a controlled manner when all consumable primary and auxiliary power sources are removed, in the event the wiring, open or short circuit, or system corruption, or any combination thereof with site specific adjustable and synchronized velocities within the range of 0.06–0.15 m/s using the unique VarioSpeed™ function.
In the event of mains power failure, they remain retracted using their own dedicated battery back-up power supply for a pre-determined period (nominally 30 minutes). If signalled to descend during this period, they fail-safe by gravity in a controlled manner to their fire operational position. At the end of the pre-determined time delay they fail-safe by gravity in a controlled manner. This safety feature is essential to avoid dangerous guillotine/ free-fall deployment.
The ability to deploy to a partial drop position prior to moving to their fire operational position under both mains, and emergency power is also available. Once retracted or in the ‘stalled’ position they have all power removed from the motor(s) to prolong motor life. A 'soft ascent facility' ensures no damage to the surrounding ceiling interface when retracting. Also includes built-in protection in the event that they are prevented from ascending to their retracted position, or descending to their fire operational position.
Fabric type is EFP™ 2/1000/SS a glass fibre, stainless steel wire reinforced, fabric coated with an micronized aluminium filled fire retardant silicone elastomer 870 g/ m² (0.178 lbs/ ft²) -5% +10%. Fabric in compliance with the requirements of Class 0 to meet the statutory guidance in Approved Document B (Volumes 1 and 2) 2006 Edition ‘Fire Safety’ to the England & Wales Building Regulations 2010.
The fabric material shall be tested as part of the complete assembly in the orientation and standard use of the application and installation in accordance with the fire resistance test in accordance with BS EN 1363-1 and -2 as required by BS EN 1634-1 in accordance with PAS 121.
Motor drive unit:
The motors contain the necessary drive mechanisms, a mechanical epicyclic gearbox retarder, automatic overload protection and both automatic and manual distance travel positioning, linked to an internal 24 V d.c electromagnetic brake with regenerative braking system.
When retracted their internal drive motor shall be isolated from all power and the barrier shall be held in position by an internal electromagnetic brake. This ensures the barriers do not drift upward or downward. Additionally, the motor is tested for operation at temperatures of 300°C (572°F) as required by BSI PAS 121.
Fail-safe release device:
The barrier assemblies operate with fail-safe by gravity, using patented true TOTAL (TGFS), in accordance with BSI PAS 121, and are able to move to their fire operational position even in the event of open or closed circuit wiring, or total system corruption, with controlled braking system and drive mechanisms. All working parts shall be totally enclosed and protected within the steel roller and shall be tested as part of the complete assembly for fire resistance.
Control units are custom made to be fully compatible with both existing alarm systems and the number of barrier units installed, whether single or multiple roller assemblies. Compliant to the Machinery Directive, EMC Directive, Low –Voltage Directive. CE Marked to BS EN 12101-10:2005 as required by the Construction Products Regulations (CPR).
Encloses the fabric and barrel assembly, manufactured from 1.2 mm galvanized steel.
Tested to use a range of heavy bottom bar weights with a minimum standard weight of 3 kg/ m (2.015 lbs/ ft) with the facility to increase this weight to 10 kg/ m (6.719 lbs/ ft) to ensure positive operation when subjected to pressure.
The barrier assemblies have the ability to operate with the barrier retained in side channels to resist pressure (as standard 20 Pa (0.08 in water) and impact (Double Severe Duty) and remove edge gaps.
Insert requirement, width up to 30 m, height up to 6 m.
L20/610 Roller shutters/ curtains
Insert requirement, width up to 30 m, height up to 6 m.
Recommended 5 mm gap between side guide and building material.
Available upon request, insert colour requirements.
Suspended ceiling with recessed shallow gap
Suspended ceiling with patented SLAT™
Self levelling access trim.
Suspended with unistrut fit
Beam protection and obstruction warning
Beam obstruction detector.
Touch button retract facility.
Split drop delay
Partially deploys to pre-determined level to permit escape and initial smoke containment.
Visual alert system
Light warning system when mains or emergency power is available.
Audio or spoken multi message facility when mains or emergency power is available.
Standard product features
120 minutes (two hours) integrity.
Period of radiation:
27 minutes <15 kW/m².
Air permeability to BS EN 1634-3:
<3 m³/ h/ m (105.944 ft³/ h/ ft) head and jambs only at ambient temperature at 25 Pa (0.1 in water) in accordance with PAS 121. The fabric material shall have a leakage rate <0.2 ± 0.2 m³/ h/ m² (7.062 ± 7.062 ft³/ h/ ft²).
Standards and testing:
- Complete barrier assemblies shall be tested for (as required by BSI PAS 121):
Approved for spans 30 m wide (1181.102 inches) and height up to 6 m (236.220 inches) maximum.
Side channels seal the curtain fabric and the building. Fire can cause extreme positive or negative pressures (up to 20 Pa). Side guide channels are constructed from galvanized steel (available in standard RAL colours) that can be either surface mounted or recessed into the wall structure to give a flush finish.
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