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Metal Ceilings - Bridging??

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  • 06-03-2009 3:47pm
    #1
    newname
    Closed Accounts Posts: 139 ✭✭


    Hi,

    Does anyone have any advice on how best to bridge for heavy lights with metal floating ceilings (under bison slab).

    Thanks


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    #2
    newmills
    Closed Accounts Posts: 473 ✭✭newmills


    Hi Newname,

    Any MF ceilings that i have done and where grounds were needed, we cut 12.5mm ply and laid it above the MF5 making sure it spanned at least 3 MF5's. Screw up into the ply from the small overhangs on the mf5. This should be sufficient grounds for any lighting etc.


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    #3
    Qwerty?
    Registered Users Posts: 1,246 ✭✭✭Qwerty?


    How much of a void are you talking about?


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    #4
    newname
    Closed Accounts Posts: 139 ✭✭newname


    Hi,

    Newmills, would you attach the ply to the bison slab or just attach directly to the metal.

    Querty, there is about 1 foot gap between each metal strip/length


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    #5
    Qwerty?
    Registered Users Posts: 1,246 ✭✭✭Qwerty?


    newname wrote: »
    Querty, there is about 1 foot gap between each metal strip/length

    I mean between the hollowcore slab and the ceiling?


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    #6
    newname
    Closed Accounts Posts: 139 ✭✭newname


    Hi,

    6 inches gap


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    #7
    newmills
    Closed Accounts Posts: 473 ✭✭newmills


    newname wrote: »
    Hi,

    Newmills, would you attach the ply to the bison slab or just attach directly to the metal.

    Querty, there is about 1 foot gap between each metal strip/length

    Newname i would screw the ply directly to the metal mf5 channel but make sure it spans at least 3 mf5's - ideally near where the metal hanging angle is attached to the mf7 (carrier bar).


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    #8
    Qwerty?
    Registered Users Posts: 1,246 ✭✭✭Qwerty?


    I had a 4" gap to fill. i cut a square of 1" thick Plywood about 350mm square. I screwed two pieces of 3x2 onto this, and then fixed this into the hollowcore slab. Then I screwed another square of ply onto the bottom of the 3X2, which ended up just above the plasterboard slab. You would need to add a layer or two of ply, or use 4x2 to make up the 6"s you need.

    Hope you catch the drift of this.
    P.M. your email and I'll send a pic.


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