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Fireproof cable supports, suspended ceilings & 521.10.202

Former Community Member
Former Community Member
Hi all


Where a cable is secured to a ceiling with non fireproof fixings but above a metal grid suspended ceiling and in a communal escape route would this be in breach of 521.10.202? The cable is not resting on the ceiling grid but fixed to the concrete ceiling above it with plastic ties and blocks. Note 3 of 521.10.202 implies this only applies to cables "clipped direct to exposed surfaces". I have no idea if such a suspended ceiling (5 years old) has any fire resistance at all btw.


Tom
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    wallywombat:

    It boils down to whether you think cables could end up dangling down to head height before the suspended ceiling itself collapsed.


    Agreed - it's a bit like the argument about letting cables rest on the ceiling grid and whether the grid is capable of taking the weight. A small T&E at a few grams per metre isn't likely to be an issue, a bunch of several 50mm² 3-core armoureds might be a bit different.


    Most of the suspended grids I've seen have been held up with steel wires from all-steel knock-in fixings in the concrete (or directly from the structural steelwork) so itself unlikely to be prone to premature collapse just to fire I would have thought.

       - Andy.


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  • 0
    wallywombat:

    It boils down to whether you think cables could end up dangling down to head height before the suspended ceiling itself collapsed.


    Agreed - it's a bit like the argument about letting cables rest on the ceiling grid and whether the grid is capable of taking the weight. A small T&E at a few grams per metre isn't likely to be an issue, a bunch of several 50mm² 3-core armoureds might be a bit different.


    Most of the suspended grids I've seen have been held up with steel wires from all-steel knock-in fixings in the concrete (or directly from the structural steelwork) so itself unlikely to be prone to premature collapse just to fire I would have thought.

       - Andy.


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