An electrically operated active smoke barrier used to form a virtually continuous barrier against fire effluent.
The SmokeStop® DH60 Concertina™ is an active smoke barrier assembly which comprises of a folded/ pleated fire resistant fabric mounted inside a headbox and fixed to a bottom tray which is fixed either side to steel pulley tapes which are wound on to a 15 mm diameter drive shaft. The drive shaft is powered by an external 24 V.d.c electric motor(s) via a chain and sprocket. They are enclosed within a 1.6 mm galvanized carbon steel box. A bottom tray suits the deflection performance requirements of the project and the desired ceiling configuration in fitted to the bottom edge of the fabric curtain.
Motors shall meet all applicable safety standards. Motors shall 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 motors are 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.
The barrier assemblies shall operate with fail-safe by gravity, using patented true TOTAL (TGFS), in accordance with BS EN 12101-1:2005+A1:2006, and be 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.
The barrier assemblies must show the tested ability to use a range of heavy bottom bar weights in order to meet the critical anti-deflection performance requirements, as required in design guides BS 7346-4, BR 368. The bottom edge of the smoke barrier shall incorporate a heavy bottom bar with a minimum standard weight of 3 kg/m with the facility to increase this weight to 10 kg/m to ensure positive operation when subjected to pressure.
The barrier assemblies type ASB1 and ASB3 for 'Life Safety' shall move to their fire operational position in a controlled manner when all consumable primary and auxiliary power sources are removed, in the event of wiring, open or short circuit, or system corruption, or any combination thereof.
The barrier assemblies shall fail-safe by gravity, using patented true TOTAL (TGFS), and 'drive up' with mains power available. In the event of mains power failure, they shall 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 shall fail-safe by gravity in a controlled manner to their fire operational position. At the end of the predetermined time delay they shall fail-safe by gravity in a controlled manner. This safety feature is essential to avoid dangerous guillotine/ free-fall deployment.
The barrier assemblies must commence movement upon initiation or any initiation, power or system failure and move to the fire operational position, in all operating modes, at site specific adjustable and synchronized velocities within the range of 0.06–0.30 m/s using the unique VarioSpeed™ function. Barrier assemblies which are located in critical areas of the project, e.g. escape routes, stairways etc. have site specific synchronized velocities within the range of 0.06–0.15 m/s using the VarioSpeed™ function. Operating speeds shall be site adjustable without altering bottom bar mass. Speeds may be dictated by those authorities having jurisdiction for 'safety in use' according to the location, nature or function of each unit.
The barrier assemblies have the facility to deploy to a partial drop position prior to moving to their fire operational position under both mains and emergency power. Barrier assemblies in their retracted or 'stalled' position have all power removed from the motor(s) to prolong motor life. Barrier assemblies that require multiple overlapping barriers have a continuous bottom bar system conjoining the run with mutual operation, i.e. one down - all down (handshaking).
The barrier assemblies have a 'soft ascent facility' to ensure no damage to the surrounding ceiling interface when retracting. The barrier assemblies shall have a built-in protection in the event that they are prevented from ascending to their retracted position, or descending to their fire operational position. This ensures they are always in their required position and avoids damage to the barrier assemblies' mechanism and surrounding ceiling finishes. Any combination of the alarm/ control signal provided by the electrical subcontractor, and/ or the specified fail-safe functions will activate the system.
The barrier assemblies must prove the ability to operate within edge gaps between 20, 40 and 60 mm, height dependent, in all other situations unless the fabric edge interfaces with a retention system, i.e. side guides to resist pressure (as standard 25 Pa).
If side guides are provided they shall have formed part of the complete system test in accordance with BS EN 12101-1:2005+A1:2006.
The fabric material shall be tested as part of the complete assembly with overlapping barrier panels in the orientation and standard use of the application and installed in accordance with the fire resistance test in BS EN 1363-1, as required by BS EN 12101-1:2005+A1:2006.
The fabric material (part of the original test specimen) shall be tested for permeability to BS EN 1634-3 with a rate < 25 m³/h/m² at ambient temperature at 25 Pa.
The fabric material shall be tested independently to reaction to fire tests in accordance with BS EN ISO 1716 and BS EN 13823 to achieve an A1 classification in accordance with BS EN 13501-1+A1.
One year warranty from date of commissioning
Coopers SmokeStop® Concertina™ DH60 Active Smoke Barrier
Beam protection and obstruction warning
Split drop delay
Visual alert system
Standard product features
Period of fire resistance:
60 minutes integrity.
Standards, certification and testing: