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Fire door step into garage

Discussion in 'Building' started by 23vc, 18 Jun 2020.

  1. 23vc

    23vc

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    Only got about 80mm step down From house into garage and no floor slope on garage, due to bad planning. Any tips on what to use to raise threshold? It’s a tiled floor so just more tiles? Is a wood strip a no no?
     
  2. noseall

    noseall

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    We have just done something similar!

    The customer wanted the utility room tiles to step down into the garage conversion. It got me thinking that the tile trim would take a battering and look unsightly. So I had an oak threshold made with a bullnose edge that protruded like a step.

    In my scenario there is an internal door right on the step. I had the oak made so that it was the same depth as the casing and wide enough to be let under the casing legs (to prevent cupping). It was thin enough (15mm) to allow for just the thickness of floor tiles to butt up to it.

    On the low side I allowed the archies to go down to the floor and neatly filled between them (below the step) with a fillet of MDF trimmed skirting, that was set back deep enough (I didn't plaster beneath the step) so that its face lined up with start of the archies.
     
    Last edited: 19 Jun 2020
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  4. 23vc

    23vc

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    Yours wasn’t a fire prevention issue though presumably if it was a conversion? Not sure where I stand with using a nice bit of oak in terms of combustible materials .... but then the fire check lining is wood...
     
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  5. ^woody^

    ^woody^

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    It's one of the antiquated requirements from the time when you could actually get your Austin 7 in a garage and people stored drums of parafin for their lamps and front room heaters.

    Who stores flammable liquid in the house garage in quantities that would fill a typical garage floor to a depth of 105mm to breach a step - that's about 1.5 - 1.7m3 of liquid - 1500-1700 litres! I think there is 65 litres in my car tank. And how does a garage floor actually fill up to 100mm depth without the liquid soaking into the floor, evaporating away, draining between the gap under the garage doors, or just blowing the house up?

    There is even a nonsense BRE study on the performance of a 100mm step. Not a 50mm step or a 150mm step just a 100mm step. The study has more holes in it than a typical garage floor. But has some nice pictures.

    Anyway, just hope that your inspector is a bit clued up and pragmatic. 20mm is nothing in context of the risk a step is supposed to guard against - how will the floor fill up with liquid, where is the door, where is the garage door that this hypothetical liquid will drain under.

    Jeez I was hoping for a calm Friday.
     
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  7. 23vc

    23vc

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    Yeah I did think that, but one of the BcOs made a point of it last time he was on site
    I can get 85mm anyway without any built up up threshold so I’ll cross my fingers and hide the tape measure
     
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