Question for Metal Experts

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Hi,

My goal is to mount two 1" x 1.5" Aluminum Tubes to
the back of my tv stand. A lcd wall mount would then
mount to the tubes. the tubes would act like the studs
in the wall.

the wall thickness of the standard aluminum tube is
0.125". the bolts would go through both sides of the tube.

My tv is about 45lbs. My question is if the aluminum is strong
enough to hold this weight. It does not seem like a lot of
weight for the aluminum but I could be seriously under
estimating. I'm trying to avoid steel since it costs drastically
more and much harder to work with.

thanks!
 
My goal is to mount two 1" x 1.5" Aluminum Tubes to
the back of my tv stand. A lcd wall mount would then
mount to the tubes. the tubes would act like the studs
in the wall.

How long are the tubes? maybe best to show a quicky sketch.
If they are longer, then sg steel would be advised. They are not that expensive unfinished, if you have a metal supply house nearby.
 
AndrewT said:
Hi,
if the tubes are vertical then the length of the tubes is irrelevant to strength.

Long tubes will deflect more due to the eccentric load and once they deflect they are no longer vertical. This will increase the eccentricity of the load.


That's the theory but unless he balances a top heavy load (under all conditions) there will be a bending force. As for conditions using only 2 vertical poles is not too stable to begin with. So use a tripod structure or get more strength to bending.
 
thanks!

I think the aluminum will work since the bolts will
go through both sides of the tube. I bought some .75" sq.
I'll be using steel washers on both ends so that should
re-inforce it some more. bottom end will be bolted down to the metal frame of my tv stand.

Now I'm wondering how many inches I can extend the mount forward since the tv is now towards the back of the stand.
I'm going to look for 6' spacers if there is such and use long
1/4" bolts.

I bought a flat lcd tv mount on ebay for $30shipping
and the tubes were $22. It sure beats the $700 TV floor stand.
The prices for those this are nuts! :bigeyes:

It will be nice to have the center channel higher up. Much better sound :D
 

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Mountain bikes have wall thicknesses less than 1/32 inch in some cases and can withstand hundreds of pounds of rider jumping off an obstacle - the secret, very little bending moment.

As others have alluded to, it all depends on geometry. Sketch your design and someone can answer your question.
 
I can imagine the particle board(?) TV stand being the weak link.

it mounts to the metal frame. the wood shelves just sits on top
of the metal frame. it's a VTI TV Stand. I like this design, very
light weight, easy to move and setup.

concept works great. just need to fine tune. unfortunately
the aluminum tubing at .125" thick is still not thick enough
since it flexes. It's holding up a 46" tv. Also, I'm going
to lower it another 3.5". I overshot a lot. I'm not a mechanical savy guy. all done with a cordless drill. would be nice with a drill press for straight holes.

I'm going to get some angle iron to re-inforce the aluminum.
that plus lowering it a few inches more should help.

other than that, I'm really glad I did this so the center can
now sit on top of the tv stand instead of in front of it.
 
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