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Old 2012-12-02, 07:21 PM
Mark & Lynda Mark & Lynda is offline
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Lag bolts are overkill and not necessary. Even today's 55" LED TVs are only 36lbs. (Samsung 7500). Check the specs for your TV to find the weight.

I mounted a 55" LED using four large shank, 3.5" wood screws. 3" into the stud, .5" drywall. A sufficient sized wood screw driven 3" into the stud will support up to 200lbs each x 4 is 800lbs. Predrill first.

If you use lag bolts you have a greater chance of splitting the 2x4 and weakening it ruining any chance of securing the mount properly.
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