How well does glued joint pine hold?

[oas]

A safety wire usually refers to a wire attached to the speaker, so it won't fall down if the shelf gives way. Like how you can secure TVs that stand on a base to the wall, so they don't tip over due to pets/children.

 

[snowjim]

By safety wire you usually mean a wire attached to the speaker, so that it doesn't fall down if the shelf gives way. Kind of like how you can attach TVs that stand on a stand to the wall, so they don't topple over due to pets/children.

Aha, but if a shelf disappears completely, the wire should be able to hold 10 KG plus a bit more when it falls down, it would require a very large screw in the speaker and the wall and probably also a heavy-duty line. It would be different for something standing on something where you just want to prevent it from tipping forward, that force is likely not anywhere near that.

 

[hsd]

You screw wire onto the back of the speaker and into the wall, just in case the cat gets the speaker sliding

 

[oas]

As hsd wrote, it's mostly to prevent it from sliding off the shelf or tipping over (like a TV, for example).

Steel wire holds a lot, for small garage doors (<160 kg) 3 mm wire is used to lift the entire door. On the larger doors I've installed (~700 kg for the door, ~1200 kg for the entire construction) 6 mm steel wire is used. But yes, it requires a good fastening that can withstand the jolt that occurs if what's tied down falls...

By the way, the shelf doesn't just disappear, it probably folds, and then the speaker ends up hanging in the wire (if it's not too long, that is).

 

[snowjim]

1 year later...

I’ve noticed that the speaker in the living room (the one mounted in plaster) is tilting slightly downward, so I took a closer look. My first thought was that the Biltema brackets had given up, but it turns out the glue board has bent!!!?



Didn’t someone say it should hold for anything?

I'm actually considering mounting the brackets directly to the speaker now.

 

[ZipLock]

It seems common for glued board to warp/bend.

Biltema stores their glued board panels standing with the result that they are already bent in the store.

 

[snowjim]

It seems common for glued-laminated boards to warp/bend.

Biltema stores their glued-laminated boards standing up, resulting in them being bent already in the store.

Aha, however, this one was not bent from the beginning.

 

[oas]

Turn it upside down for a year and maybe it'll straighten out again.