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What size opening and lintil for standard size fire door

Discussion in 'Building' started by mrbg07546, 29 May 2016.

  1. mrbg07546

    mrbg07546

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    hi we are fitting a standard size door from hallway to garage.

    What is the size opening required.

    Some one said door size plus 80mm. That makes 918 which means a 1200 lentil would be just short to for a 150mm bearing. So I'm thinking 1300? Thoughts?

    Also white should the height be
     
  2. kazuya

    kazuya

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    my thoughts are measure the door frame you fitting and use those sizes
     
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  4. ^woody^

    ^woody^

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    No one makes a 1300 lintel.

    A 1200 lintel is standard for many of the standard single doorsets though.

    The height should be to match your other door head heights, unless you want odd heights

    Don't listen to that someone again for any building advice.
     
  5. noseall

    noseall

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    There are small variations in frame sizes in terms of external, fire etc. I'd go and buy the frame and build the opening to suit. If you are doing a knock through then I'd allow at least 25mm up each side extra then line the opening out with dabbed plasterboard then fix your frame to the nice straight surfaces.
    Don't forget to mark off your fixing points before dabbing.
     
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