FIRE RESISTING DUCTWORK
Fire-resisting ventilation or extraction steel ductwork is designed using proprietary materials and fixing techniques to contain fire and the products of combustion in a manner that does not allow passage to other parts of the building from the compartment of origin for a stipulated time period. Fire-resistant ductwork can also be constructed without a steel lining duct using self-supporting board and casing systems made from calcium silicate and cement based products.
Areas of application include:-
• smoke extract systems
• dual ventilation/smoke systems
• pressurisation systems
• car park extract systems
• kitchen extract systems
(links to images for each of above)
Fire-resistant ductwork systems must be fully tested or independently assessed to the requirements of EN 1366-1. This must include the method of support and the type of seal used around the ducts where it penetrates a wall or floor. Ductwork should be tested for both fire outside and fire inside both in horizontal and vertical orientations, unless the end use conditions are to be restricted.
Seven people have been killed and 11 seriously injured by a fire in a nine-storey hostel housing immigrants in the eastern French city of Dijon
