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    newbeei's Avatar
    newbeei Posts: 2, Reputation: 1
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    #1

    Dec 30, 2010, 10:25 AM
    I am dropping a ceiling in my house. I want to use 5/8' drywall.
    The room 13x13. What size rafter should I use?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Dec 30, 2010, 10:35 AM
    2X8 #2 hemfir or equivalent according to span tables. Why are you using 5/8 for a dropped ceiling? It's not a fire division. Noise control? It's a killer to hang overhead!
    newbeei's Avatar
    newbeei Posts: 2, Reputation: 1
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    #3

    Dec 30, 2010, 03:03 PM
    Comment on ma0641's post
    Part of the plaster latt has been removed for mold. So part of it is fire division. Thanks for the help.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Dec 30, 2010, 05:40 PM
    Comment on ma0641's post
    Thanks for the clarification. If it is a fire division, make sure you use X rated drywall and they may make you seal openings with fire retardant foam or caulk.
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