Reply to thread

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Message: <blockquote data-quote="binky" data-source="post: 558945" data-attributes="member: 490">Right, so now we know what the real concerns are. I would think that is more to do with construction standards, and fire detection. A school I work in has a new build block with web joists, above suspended ceilings. All voids have fire detection in them, all electrical fittings are standard stuff. Each void has concrete fire partitions between them ( basically one void per classroom) the issue then is any services penetrating a fire wall are suitably sealed with intumescent materials - something I understand didn't happen in Grenfell. No electrical items such as junction boxes or cable runs are fitted to the wood in any of the voids, they are mounted to the concrete or cable tray ie non flammable surfaces where ever possible. The whole point of fire rated downlighters etc etc is to prevent fire in a room penetrating the voids, ie not be the weak point in a fire rated ceiling, so spec of those, in my mind, is nothing to do with fire travelling through the voids, they just have to match the fire raring of the surface they are mounted to. Eg 90 min ceiling needs 90 min fire rated downlighters.</blockquote>