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Television Wall Mounting - Torque Considerations

  1. May 11, 2007 #1

    I'm considering the purchase of a 100 pound LCD television. I anticipate mounting it with an articulating mounting system. The mounting system will allow the television to extend ~27 inches from the mounting wall (thereby creating a considerable torque load on the wall studs used). The mounting system requires anchoring it to 2 wall studs (2" X 4") approximately 16" apart. The wall mounting plate is only about 18" wide - to span 2 studs with a little horizontal location flexibility. The area I would like to use for the installation has only 2 wall studs available but they are approximately 24 inches apart.

    I am considering:
    1. bolting a couple of 1/2" thick steel rectangular pieces (maybe 4" tall) between the 2 wall studs
    2.then mounting the system's wall bracket to the steel pieces through drilled holes using bolts and nuts or through threaded holes using only bolts

    I really don't have any understanding of the torque implications of the above described mounting scheme as compared with the 'acceptable' torque situation in the 2 stud (16" apart) mounting.

    Will the wall stud and steel bar system safely support the 100 pound television when it is 27 inches from the wall?

    Do I gain anything by attaching one end of the wall mounting bracket through the steel pieces and into one of the wall studs?

    Do I gain anything if I can also have the wall mounting bracked welded to the steel bars?

    Any other options to safely overcome this problem installation?

    I really don't want to pull the 2 wall studs through the wall board and maybe cause the wall (and maybe the house) to collapse. Less critical, but still highly unacceptable - I would't want the LCD television to come crashing to the floor. I don't think this would be covered by the manufacture's limited warranty.

    In advance, thank you one and all for your suggestions.

  2. jcsd
  3. May 11, 2007 #2


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    Staff: Mentor

    Draw a picture (a free body diagram). The system is a truss and each member is either in compression or tension and it isn't difficult to analyze.
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