Enginerdad t1_j9ybi03 wrote on February 25, 2023 at 1:33 PM

FYI, the 16 kg rating is for shear (the anchor pushing sideways on the wall) loads. Mounting a shelf puts a lot of tension (pulling out of the wall) on the anchors, which almost none of them are rated for.

KruppeTheWise t1_j9zlpab wrote on February 25, 2023 at 7:01 PM

Nicely explained. I just get apoplectic with rage watching new AV technicians trying to justify mounting an articulated bracket with drywall plugs

"but each is rated to 75lbs I'm using 4 and this all weighs less than 100lbs! I've done it before bro chill out"

I won't chill, you're going to fucking kill a child, do not show up tomorrow if this isn't fixed in the next 30 minutes.

Enginerdad t1_j9zvrk5 wrote on February 25, 2023 at 8:09 PM

Maybe even worse, an articulated bracket is subject to being moved and wiggled around, which drywall anchors also suck for.

particlemanwavegirl t1_ja0si0u wrote on February 26, 2023 at 12:03 AM

What do you mean, sideways? Do you mean downwards? Or into the wall, opposite of outwards? Why would they be rated for sideways force? How and when would sideways force be applied? Literally cannot figure out what it means in the context.

Enginerdad t1_ja0zi5d wrote on February 26, 2023 at 12:57 AM

Sideways as in in the plane of the wall. Up, down, left, right, or any angle in between those. Usually the load is down because well, gravity. Just not in toward the wall or out away from the wall.

particlemanwavegirl t1_ja19zzh wrote on February 26, 2023 at 2:20 AM

So you meant lateral? Why not say that? You've broken like three conventions at once, it's very confusing.

Enginerdad t1_ja1dpjt wrote on February 26, 2023 at 2:50 AM

Because a bunch of laypeople may not know what lateral means, and I'm trying to make the information as accessible as possible. That's also why I explained shear and tension.

But also because lateral is no more accurate or precise than sideways. Lateral loads are horizontal, as made distinct from vertical loads. The most correct terms are shear and tension loads, or possibly in-plane and out-of plane loads.