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    Seperation wall question

    Seperation wall question

    New postby Marc M on Mon Mar 28, 2011 7:30 pm

    Jerry, I just want to confim that plastic laundry utility boxes (used to house drain+water) are NOT allowed in the seperation wall between garage and house.
    And, how do plastic electrical boxes or coverplates play a role in this wall?
    R302.4.2 Membrane penetrations.
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    Marc M
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    Re: Separation wall question

    New postby Jerry Peck - Codeman on Mon Mar 28, 2011 10:18 pm

    Presuming that this is on the garage side, this is not good, but how 'not good' depends on the answer to the next question.

    Question: Does California require actual "fire walls" between a garage and a house, or only separation? Or maybe even something in between the two?

    A true fire wall is fire rated from both sides (one example may be 5/8 inch Type X on both sides of the wall, taped, opening protectives, etc. - on both sides of the wall).

    Some areas only require the garage/house separation wall to be fire resistant (not truly fire rated) on the garage side (Type X on the garage side only, 1/2" gypsum on the other side, no opening protectives either side, but maybe Type X covering the washer box in your photo as a five sided box around the back side of the washer box).

    Other areas, most areas now, do not require Type X on either side of the wall, and thus no opening protectives, however, those areas would require 1/2" gypsum or equivalent on the garage side, which means that plastic box would need a five sided box made from 1/2" gypsum enclosing that plastic box.
    Jerry Peck - CodeMan

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    Construction Litigation Consultants, LLC.
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    Return to Fire-rated assemblies: Fire walls, fire partitions, smoke barriers, ceiling-floor, ceiling-attic; Separation of garages from dwelling unit; Separation between structure's exterior walls and property line

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