About Cast-in-Concrete Acoustic/Smoke/Fire Protection Sleeves
A circular metal collar with an intumescent lining, designed for setting into concrete and to allow any type of service (cable, pipe, etc) to be inserted or removed at any time.
Removable end-caps are made from acoustic sponge and fireproof card, and can be cut with a sharp knife to accommodate services up to 200mm internal diameter. They can be fitted into bored holes if new services are required after the concrete has been set.
Suitable for use in either domestic or industrial applications (such as computer rooms, hospitals, laboratories, etc).
For use around services in fire-rated concrete floors, the sleeve is fastened to the reinforcing mesh with wire ties and cast into the concrete. The enclosed ends prevent concrete from filling the inner part of the sleeve. After casting and before the concrete is set, the ends are simply wiped clean with a damp cloth.
When the concrete is set, the end caps are released by scoring around the rim tape with a sharp knife.
End-caps are then cut to fit the service and are placed back into the end of the sleeve. At any time, these end caps can be removed for maintenance, offering excellent versatility. In a fire, the intumescent liner expands to fill the gap around the services and blocks passage of smoke and fire.
Tested to BS475 Parts 20 and 22 (1987), giving up to 4 hours protection and sound insulation to Doc E of the UK Building Regulations and BS476 Part31/1.
Also tested at VNE to European Standard EN1363-1 (2000) Acoustic testing to BS EN ISO 717-1 (1999)
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