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SOS, Mount projector to ceiling, meet metal rather than wood

post #1 of 5
11/14/12 at 10:51pm
Thread Starter 
Used stud finder and found where the ceiling stud (joist) is, and start drill a pilot hole, once the drill bit go the drywall, it suddenly stop and I tried drill it further, and only get some small piece metal, which is eaten by the bit.

So I certainly be hesitate on continue, and I found another place (16" away) and drill thru it, it's the same, still get metal!

Any idea, BTW, it's a single family home, should be normal structure, I had successful install a wall mount for my LCD tv

And also, is it possible to just mount it into drywall with some strong anchor
The projector is pro8200 and with the mount it weight 13lbs

Thanks
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post #2 of 5
11/15/12 at 12:32am
The metal could be a few things... duct work if the metal is thin and flexible, but it would be between studs. If you are sure you are actually on a stud (see drywall screws?) itmight be a nail protection plate like this:

Don't drill through it.

Anchor bolts or toggle bolts are rated for the weight, but I would be nervous with only 5/8" of chalk and paper holding 13lbs (and $800) above my head.. They also extend thru the drywall into the void behind to work, which doesn't solve your metal problem.

Depending on how DIY capable you are, and your cable/power routing plans, you can just carefully keep drilling pilot holes or even open up a 4x4 window and see what you have to work with. Make sure your wife is gone for the day smile.gif
Maybe someone else will have easier suggestions.
Edited by DragonSixGolf - 11/15/12 at 12:41am
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post #3 of 5
11/15/12 at 9:38am
Thread Starter 
I used the stud finder and it do show up a 16" spaced structure, so I think it's highly possible a stud, and my stud finder also can tell AC wire and detect metal, when I go thru the stud, the metal indicator do light up, showing there is metal along the stud, but there is no AC indicator, means it shouldn't the power wire. but it likely some cable (weak electric wire).

I think very likely the picture you showed is the situation I'm facing, I will try to look up the ceiling thru the furnace area and understand the structure first, and then maybe I will use metal detector to find out where the metal sheet ends, with that I can probably still find some place I can drill thru and then I will need to buy some MDF to bridge it.

thanks!
Quote:
Originally Posted by DragonSixGolf View Post

The metal could be a few things... duct work if the metal is thin and flexible, but it would be between studs. If you are sure you are actually on a stud (see drywall screws?) itmight be a nail protection plate like this:

Don't drill through it.
Anchor bolts or toggle bolts are rated for the weight, but I would be nervous with only 5/8" of chalk and paper holding 13lbs (and $800) above my head.. They also extend thru the drywall into the void behind to work, which doesn't solve your metal problem.
Depending on how DIY capable you are, and your cable/power routing plans, you can just carefully keep drilling pilot holes or even open up a 4x4 window and see what you have to work with. Make sure your wife is gone for the day smile.gif
Maybe someone else will have easier suggestions.
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post #4 of 5
11/15/12 at 5:36pm
Thread Starter 
Unfortunately, today I checked it again with my stud finder, it turns out the whole stud is metal or metal covered, every where I find the stud, I find metal

What can i do and how can all the stud is cover by metal, for a wood structure home, damn it!

Any help now will be highly appreciated!
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post #5 of 5
11/16/12 at 6:48am
Quote:
Originally Posted by vincentxw View Post

Unfortunately, today I checked it again with my stud finder, it turns out the whole stud is metal or metal covered, every where I find the stud, I find metal
What can i do and how can all the stud is cover by metal, for a wood structure home, damn it!
Any help now will be highly appreciated!

How familiar are you with your home? Did you build it or did you buy it already constructed?

Take a look at this link.

http://homeguides.sfgate.com/tell-ceiling-joist-metal-33285.html
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