Car Park Extract
Car Park extract should be tested for Type A (fire outside) and Type B (fire inside) to BS476- part 24 for a specified time for Stability, Integrity and Insulation (if required). The Building Regulations specify what is required to maintain safe conditions, in particular Approved Document B and Approved Document F
- Mechanical ventilation must provide 6 air-changes per hour in normal conditions.
- For smoke clearance 10 air changes per hour is required.
The regulations for smoke clearance state that the system should have an extract facility which is split into two parts, each part capable of providing 50% of the required duty and extracting from both high and low level
The use of a coated or boarded systems in Car Parks can lead to their fire rating being compromised if the coating is damaged.
Air Extraction must be maintained and Fire Dampers must not be used.
|System Description||Material||Stability & Integrity||Insulation|
|Car Park Extract||Galvanised Mild Steel||Up to 4 Hours||Up to 2 Hours*|
*Insulation values are obtained through the application of specific insulation
Trusted by the trade
Our professional approach and continual investment in the training of our staff, technology and manufacturing methods ensure you receive the very best product and service. We are ISO 9001 and Investors in People accredited and manufacture to a high DW144 standard by our own skilled and experienced sheet metal fabricators.
Non Coated galvanized ductwork has significant commercial and environmental savings on systems using intumescent or flame retardant coatings that require energy and chemicals to degrease, etch, prime , paint and dry but also alleviates the inherent problems of damaging these coatings during assembly and installation and compromising the fire resistance of a coated system.
Fire rated ductwork:
- 2 hour ductwork
- 4 hour ductwork
- Kitchen Extract Duct
- Smoke Extract Duct
- Fume Extract Duct
All fire rated ducting is manufactured to the Caswell Firesafe specification. See our About Caswell Firesafe page for further information.
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