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cowboyro
Premium Member
join:2000-10-11
CT

cowboyro to TheMole

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to TheMole

Re: How much weight can a standard stud wall hold?

It all depends if and how the sheathing and drywall are anchored to it and how lousy the framing was done.
I would assume you anchor the mount to 2 studs, not just 1. It should hold without any issue. I'd be more worried about the screws holding in crappy wood.
Also you are incorrectly assuming a 400lb of weight. It's 400lb of pull from the top screws.

AVD
Respice, Adspice, Prospice
Premium Member
join:2003-02-06
Onion, NJ

1 recommendation

AVD

Premium Member

you have to mount directly to the studs

TheMole
join:2001-12-06
USA

TheMole to cowboyro

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said by cowboyro:

It all depends if and how the sheathing and drywall are anchored to it and how lousy the framing was done.
I would assume you anchor the mount to 2 studs, not just 1. It should hold without any issue. I'd be more worried about the screws holding in crappy wood.
Also you are incorrectly assuming a 400lb of weight. It's 400lb

4 lag bolts, mounted to two studs (two bolts per stud), studs are 16 inches on center and we're using studs immediately next to each other.

yes - i agree, i'm concerned the bolts will not hold to the studs, too.
said by cowboyro:

Also you are incorrectly assuming a 400lb of weight. It's 400lb of pull from the top screws.

right you are -- it's 400lbs of pull from the top. total weight is 145 (85+60).
TheMole

TheMole to AVD

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to AVD
said by AVD:

you have to mount directly to the studs

the mount is connected to two studs, with four lag bolts.

AVD
Respice, Adspice, Prospice
Premium Member
join:2003-02-06
Onion, NJ

AVD

Premium Member

are they wood studs?
interior or exterior wall?

cowboyro
Premium Member
join:2000-10-11
CT

cowboyro

Premium Member

Looks like a 3/8" lag bolt going 2" deep has a pull force of 1900lbs.
Go 1/2" at 3.5" deep and you have a pull force of 3500lbs.
Should be fine
Now if you keep moving the arm that may be a different story...

TheMole
join:2001-12-06
USA

TheMole to AVD

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to AVD
said by AVD:

are they wood studs?
interior or exterior wall?

wood studs, interior wall. wall is load-bearing, i believe.
TheMole

TheMole to cowboyro

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to cowboyro
said by cowboyro:

Looks like a 3/8" lag bolt going 2" deep has a pull force of 1900lbs.
Go 1/2" at 3.5" deep and you have a pull force of 3500lbs.
Should be fine
Now if you keep moving the arm that may be a different story...

EXCELLENT. this is what i was looking for and hoping for. Thanks. The bolts are exactly: 5/16 x 3 Lag Bolts -- smaller than your spec, but probably effective. (i needed the key word "pull force" from your post... perfect. Here is a good URL on this: »www.kineticsnoise.com/Se ··· rews.pdf

The arm will only be moved occasionally. To watch TV, I have to have the arm extended -- I watch a lot of TV -- so it'll likely always be in the same spot.

I'll push the TV back to the wall when i have formal gatherings at my house - where I care that the TV set up looks neat and not like a movie theater..