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Smoke Curtains

SD60 Automatic Smoke Curtains

Originally the primary use of smoke curtains was for smoke containment and smoke channelling, particularly in complex buildings such as airports and shopping centres.

Smoke sealing and smoke permeability are now important considerations and in both cases Guardian have a suitable curtain solution.

The SD60 Smoke Curtain has been utilised by architects and fire engineers in buildings all over the world. It is a highly regarded for its lightweight robustness and quality engineering. Accredited to the following standards

EN 12101 B Reliability Test
EN 12101 C Air Leakage Test
EN 12101 D FR & Integrity Test
UL 10D Fire Protective Curtains 60 mins
UL 10D S Smoke Sealing
UL864 Releasing Devices
EN1634-3 Assembly Leakage
BS476 – 6 & 7 Fire Propagation / Surface Spread
BS7346 - 3
Fabric Type: X32K
Fabric Rating: 60 minutes
Fabric Weight: 540gr/sq. metre
Curtain Descent: Gravity fail-safe

 

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SD60 smoke curtains are totally gravity fail safe and incorporate the latest in electronic technology. As a result SD60 is one of the most advanced, yet cost effective systems on the market.

Limit switch control has been replaced with current-limiting systems to determine the upper position of the curtain. The 24v motor will retract the curtain until the bottom bar pulls against the underside of the head box. The current drawn by the motor will begin to rise, this will be detected by the motor control circuit and the supply will be stepped back to a holding voltage of approximately 4 volts.

Upon receipt of a fire or test signal the holding voltage will be removed to the motor. The weight of the bottom bar will force the motor windings to return generating a back EMF. This facility ensures a controlled descent of the curtain even in the event of total power failure.

This method of operation should be used to deploy the system at all times. A curtain that is powered down under normal test conditions from either mains power or the battery supply is only proving that it can deploy when powered. This does not confirm the ability to fail safe.

The curtain fabric has a “Panama” weave which offers a more even surface and allows a tighter interlacing of the fabric edges. The tensile strength of Panama weave fabric is 10% greater than other fabrics due to the constant thread tension. The extra strength helps the curtain to keep its shape whilst retracting onto the roller.

 

Specification

Guardian Doors Smoke Curtains

 Guardian Doors moke Curtains

Head Box Specification:

Material: 1.2 mm galvanized steel

Finish: Optional powder coating, optional stainless steel

Access: Removable cover plate

Dimensions: (Up to 3 m drop)

Type A: 150 mm x 150 mm

Type B: 250 mm wide x 150 mm high

Type C: 150 mm wide x 250 mm high

Professional Installation - FIRAS

The installation of a fire door or shutter is a complex procedure requiring a detailed understanding of the role played by each individual component. It therefore needs to be installed by someone with the correct training and expertise.

As approved Firas Registered Fire doors and shutter installers we ensure a certified and traceable process from manufacture to installation.

firas.jpg

FIRAS is a certification scheme for companies installing fire protection products and systems.

No matter how good a product is, poorly installed its fire protection performance can be severely reduced.

We are certified installers of fire doors and shutters. Proper installation of fire shutter assemblies and door sets is fundamental to their overall performance.

FIRAS

 

Maintenance Packages

Planned preventative maintenance

See our maintenance section or contact us for more information.

Guardians repair and maintenance services and engineers are accredited to the DHF's TS004 Repairs and maintenance standardand

Click here for more information.

Why have your door and shutter systems maintained?

  • It is a legal requirement - as failure to show evidence of maintenance could mean prohibition & enforcement notices being served and fines up to £5000 and imprisonment for 2 years. 'Safety In Use', the New European CEN Standards legislation - States that all types of door should be maintained in an efficient state, in efficient working order and in good repair. For further clarification visit www.dhfonline.org.uk.
  • Routine maintenance prolongs the operational life of the installation and ensures that the installation is kept in good working order.
  • It ensures that the door is working in a safe and efficient condition - helping to prevent accidents and damage which in turn results in down time, effecting work flow, productivity and resulting in loss of revenue.
  • It assists in identifying potential problems which can easily be rectified.

 

Why Choose Automatic Curtains?


Smoke is the greatest threat to life safety in a fire situation, graphics 1 and 2 indicate one of the many problems smoke can cause in large buildings. In the event of a fire at a lower level, smoke will rise and enter the upper floors. This smoke will reduce visibility and cause occupants to be disorientated, and could result in deaths. By using Smoke Curtains with Smoke Ventilators and fresh air intake it is possible to ensure that the unaffected floors are protected.

Why Choose Automatic Curtains?



This graphic shows the result of installing an automatic smoke control system. The smoke detections system would activate and the Smoke Curtain system would be deployed on all floors with the exception of the floor on which the fire has been detected. In turn the smoke extraction system would operate. Smoke is restricted to the fire floor leaving the remainder of the building free from smoke allowing safe egress for the occupants.

Why Choose Automatic Curtains?

Fire compartmentation is a requirement of Building Regulations, access routes through fire compartment walls need to be protected to provide the required fire integrity. A cost effective solution is to install Automatic Fire Curtains which are a lightweight compact and convenient alternative to fire shutters.

This image shows an access door between 2 areas in a storage warehouse, the doorway is in constant use from pallet trucks and employees, however the doorsinstalled would not provide an adequate fire barrier.

Upon activation of the fire alarm system the fire curtain would descend and a compartment with a fire rating of 4 hours would be created. Fire curtains can be manufactured to various widths using single or multiple roller systems.

SD60 Smoke Curtain

Save Specification

Product reference: GUARDIAN SD60 SMOKE CURTAIN

Description: SD60 is an electrically operated automatic smoke barrier, to be used to form a continuous barrier against smoke produced in a fire.

Approved Standards: BS 7346: Part 3: 1990, BS 476: Part 6: 1989, BS 476: Part 22: 1987, EN 12101-1, UL 10 C, BS EN 1634 – 1:2000, BS EN 13501-2: 2007 classified E60

Product Performance: Complete product tested to (BS) EN12101-1:2005 and BS7346: Part 3, and achieved a rating of DA (600°C, above 120 minutes) and isSB 1 and 3 classified.

Designed to operate for 2000 cycles at normal ambient temperatures in the range of 0°C to 60°C and to withstand hot air and smoke at temperatures up to 600°C for over 120 minutes once only.

The fabric has a class 1 surface spread of flame when tested to BS 476: Part 7 and a fire propagation index I =1.4 when tested to BS 476: Part 6. It is therefore rated Class 0 to the UK Building Regulations Approved Document B 1991.

General Description: The curtain head box is manufactured from 1.2 mm galvanised steel, the enclosure is rated at the same temperature as the curtain fabric. Removable cover plates are incorporated to allow access to the curtain rollers. Standard head box sizes are 150mm x 150mm for single rollers (maximum width 5.5m) and 250mm x 150mm for multiple rollers (over 5.5m wide). Larger head boxes may be required where the curtain drop is in excess of 3 m. A suitably  weighted bottom bar is provided to prevent deflection and ensure correct operation under gravity. A polycarbonate extrusion is supplied as standard, this locates into the profile formed in the bottom of the box. The roller is constructed from an octagonal tube, each of which incorporates a 24volt d.c. motor & gearbox and a sealed heavy duty ball bearing assembly. A motor control circuit housed in a steel enclosure is mounted onto the motor end of the head box. The fabric curtain is manufactured from X32K woven glass fibre cloth incorporating a “Panama” weave for increased stability.

Fabric: The fabric has a nominal weight of 540g/m² and is tested to withstand temperatures of up to 1000°C for a period of 60 minutes. The curtain fabric has a “Panama” weave which offers a more even surface and allows a tighter interlacing of the fabric edges. The tensile strength of Panama weave fabric is 10% greater than other fabrics due to the constant thread tension. The extra strength helps the curtain to keep it’s shape whilst retracting onto the roller.

Control System: The system must be proven to fail safe to the operational position on total loss of primary and auxiliary power. Under normal operating conditions the curtains would be held in the retracted position via the motors operating at low voltage. The manufacturer must be able to confirm that the motor windings used are suitable for this type of operation. Upon activation of the fire alarm the control panel will remove the supply voltage and the curtain will descend under the power of gravity in a controlled manner. A dynamic braking system housed in the motor control circuit controls the speed of descent of the curtain, this is electronically synchronised on overlapping curtains with a common bottom bar.

To retract the curtain the control panel supplies 24v to the motor control circuits and the motors drive the curtains to the upper position. As the bottom bar or stopping bar hits the curtain head box a current limiting circuit steps back the voltage and current and holds the bottom bar in the retracted position. The system must have the facility to allow the position of the bottom bar to be reset from the control panel to overcome the problem of the bottom bar “creeping” down. Limit switches are not to be used to control the upper position of the curtain.

Should the mains power fail to the group control panel the supply is automatically switched to the integral standby battery. The curtain remains in the retracted position for 1 hour (fully loaded system). The curtain will remain fully operational until the battery low voltage cut off facility reads a voltage of 21v, the curtains will then safely descend under the power of gravity to the operational position.

Optional Extras:

Split drop delay:

An optional braking system is available to allow a two stage descent during gravity deployment. Partial descent to a predetermined level to permit preliminary escape and initial smoke containment, after delay the barrier descends to full operational position.

Voice warning:

Audio or spoken multi message facility.

Beam protection and obstruction warning:

A beam detector, with delay timer which will sound in the event of any obstruction being placed in the barrier drop line.

Visual alert system:

Standard localized light or strobe light.

Emergency retract:

Hold on retract facility for multi escape and emergency service access.

Walk through escape:

Passage through the barrier.

Monitoring:

Monitoring relays can be installed in the group control panel to provide BMS contacts for mains failure and curtain zone deployment. Monitoring relays can be installed in the motor control circuits to provide BMS contacts for individual curtain deployment.

Manufacturing:

All equipment will be manufactured and pre-assembled to approved drawings.

Consult with Guardian Industrial Doors Ltd technical literature for details. Guardian Doors can also provide a design and specification advisory service and it is recommended that they are consulted early in the design process.

Manufacturer: GUARDIAN INDUSTRIAL DOORS 45 Progress Road Leigh On Sea Essex, SS9 5PR Tel: 01702 512424. Fax: 01702 510015.

Email: mail@guardiandoors.com Web: www.guardiandoors.com

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