Durasteel Fire Barriers
What can happen?
During a major fire large compartment, walls or enclosures may be subjected to extreme conditions and impact damage due to falling debris, leading to failure and in some cases total collapse.
In circumstances of extreme fire it is vital both materials and construction are capable of sustaining their design function. When subjected to these extreme conditions, Invicta Durasteel achieved a fire rating of 240 minutes and together with its ability to withstand impact gives it the strength to protect in the harshes of fires.
This was clearly illustrated when fire broke out at the Bass Charrington Runcorn Brewery. It rapidly spread through the roof insulation devastating everything in it's path.
A durasteel barrier stopped the fire from spreading tio the bottling plant, saving buildings, equipment and plant valued at £10 million and anabling production to continue on a limited scale.
The Durasteel barrier acted as an external wall during the re-construction of the fire damaged site, withstanding all the elements.
Features
- Four Hour Fire Resistant
- Impact Resistant
- Moisture Resistant
- Lightweight - No foundations required
- Space-Saving, with excellent Structural Strength & Integrity
- Demountable / Remountable
- Maintenance Free
- Suitable for Internal and External Locations
- Can be Prefabricated - offsite
- Purpose Built to meet Individual Requirements
- Vibration Resistance
Construction and Manufacture
Typical barrier construction:
Durasteel partitions provide vertical fire barriers to meet the requirements of BS 476: Part 22: 1987.
Durasteel partition and barrier systems combine superior levels of fire resistance and high surface impact resistance.
They will withstand the wear and tear of industrial and commercial environments and resist the forces of high pressure hose streams encountered during fire-fighting.
These outstanding characteristics provide a durable and fire safe method for the construction of vertical barrier systems to maintain compartmentation in industrial environments.
When designing the Durasteel framing system, consideration must be made for expansion, deflection, windloading and loadbearing requirements.
The constructions have been tested to both fire and impact resistance in accordance with BS 476: Part 22: 1987 and similar international standards with the construction subjected to impact of 3000Nm both prior and after the fire test.
Typical Mechanical Properties
| Flexural strength F | 9.5mm | Average, dry | N/mm2 84 |
| Modulus of elasticity E | 9.5mm | Average, dry | N/mm2 40,000 |
General Technical data
| Material class | Non-combustible |
| Surface spread of flame | Class 1 |
| Building Regulations classification | Class 0 |
| Alkalinity (approximately) pH (core) | 10-13 |
| Thermal conductance (approximately) at 20°C W/m2K | 60 |
| Coefficient of expansion (20-100°C) m/mK | 15 x 10-6 |
| Nominal moisture content (air-dried) % | 6 |
| Moisture movement (ambient to saturated) % | - |
| Thickness tolerance of standard boards | +1.0 to -1.0 |
| Length x Width tolerance of standard boards mm | ±2.0 |
Board Format Data
| Thickness (mm) | Length x Width (mm) | Approx. Weight (Kg/m2) | |
| Dry | With approx. 6% moisture | ||
| 9.5 | 2500 x 1200 | 19.8 | 21.0 |
Construction Details
| Specific Applications Required | Primary Performance | Fire Performance (minutes) |
| Public and service corridors | Impact resistance | E120 |
| Warehousing | Impact resistance | E240 |
| Industrial buildings | Impact resistance | E240 / I60 |
| Mass transit systems | Impact resistance | E240 / I120 |
| Manufacturing facilities | Impact resistance | EI 240 |
| Other areas subject to abnormally rough use | Impact resistance | |
| Offshore facilities | Blast resistance | H120 |
| Petro-chemical industry | Blast resistance | H120 |
| Gas processing plant | Blast resistance | |
| Other areas subject to projectile or explosion risk | Blast resistance |
System Performance
| Type | Building & Construction | Offshore Constructions |
| Single-skin Constructions | E60, E120, E240 or E360 | Marine Classification A0 (A and B class), H0 |
| Double-skin Constructions | EI 60, EI 90, EI 120, EI 180 or EI 240 | Marine Classification A60 for standard fire tests H60 and H120 ratings for hydrocarbon fire tests. |
| Special | Invicta Durasteel has designed and installed many purposebuilt fire walls, which provide special performance characteristics beyond fire resistance. All structures can be independently assessed to ensure the required performance is achieved. |
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Technical Data
1. Durasteel, 9.5mm thickness.
2. Steel sections forming framework, usually comprising 80mm x 60mm x 3mm channels thick located at 1200mm centres or at every board vertical edge. These framing centres may vary depending on the size and performance requirements of the system.
3. Steel sections forming top and bottom tracks of framework, usually comprising 80mm x 60mm x 3mm channels, fixed to substrate using steel expansion bolts at nominal 500mm centres.
4. Horizontal framing members comprising steel channels, 80mm x 60mm x 3mm, at 2500mm centres or at every board horizontal edge.
5. Durasteel fillets 100mm wide, thickness and number required depend on the fire resistance of the system.
6. Mineral wool, thickness and density in accordance with the required fire resistance performance.
7. Steel angle cleats, minimum 60mm x 120mm x 3mm. Alternatively, joints between framing members can be welded (8).
8. Welded joint.
