Fire-rated staff ducts EI 60 to EI 120 for ventilation and smoke extraction. Certified EN 1366. Public buildings (ERP), high-rise buildings (IGH), residential.
EXTHAMAT shells designed for the protection of enclosures and staff ducts. Made from fibre-reinforced plaster, they offer up to 4 hours of protection and can be assembled inside or outside. Available from stock.
A fire-rated staff duct is a rigid conduit used in passive fire protection to compartmentalise the technical shafts of buildings. Made from fibre-reinforced plaster, it provides fire resistance up to EI 120 (two hours of stability and resistance to flames and hot gases).
Staff ducts are one of the most reliable solutions for protecting ventilation ducts, smoke extraction ducts, cable trays and pipework passing through building walls and floors. They are specified in the majority of Public Buildings (ERP), High-rise Buildings (IGH) and residential buildings subject to fire regulations.
For over 40 years, EXTHA has manufactured its staff ducts at its factory in Groslay (Val-d'Oise). This industrial expertise allows us to control every stage of production: raw material selection, plaster formulation, board casting, drying and quality control.
Our factory produces the entire range of EXTHAMAT boards, the base material that makes up our staff ducts. This mastery of the production chain allows us to guarantee consistent quality and offer bespoke solutions tailored to each project.
The vertical integration of our business, from manufacturing to on-site installation, is a decisive advantage for our clients. A single point of contact for the entire project, from specification to acceptance of works.
EXTHA staff ducts are tested and certified in accordance with the most demanding European standards:
These certifications guarantee that our staff ducts meet French and European regulatory requirements. Each product comes with its fire test certificate and detailed technical datasheet, available in our downloads section.
Public buildings of all categories are subject to strict fire protection obligations. Staff ducts allow technical shafts to be compartmentalised while meeting the fire resistance requirements imposed by regulations. Hospitals, schools, shopping centres, hotels — each type of public building requires a specific approach that our teams master perfectly.
In high-rise buildings, regulations impose particularly high levels of fire resistance. EXTHA staff ducts, rated up to EI 120, meet these requirements and ensure the compartmentalisation of technical shafts throughout the height of the building.
Multi-family residential buildings are also concerned by passive fire protection. Staff ducts protect risers, ventilation shafts and pipe penetrations between different apartments and common areas.
The choice between an EI 60 (one hour resistance) and EI 120 (two hours) staff duct depends on several regulatory and technical factors. As a general rule:
The installation of EXTHA staff ducts follows a rigorous process that guarantees compliance of the installation:
Our installation teams are continuously trained and hold recognised expertise in the implementation of fire-rated systems. This competence is the result of over four decades of experience on French and European construction sites.
EXTHA guarantees a single point of contact, from design to acceptance, for all your passive fire protection projects.
Our experts analyse your project free of charge and propose the solution adapted to your regulatory requirements.
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