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Im_A_Model OP t1_j9xzhwz wrote

Reply to comment by RexiReddit in Hanging heavy oak shelf on aerated concrete by Im_A_Model

Thanks for the advice. Just went and bought some epoxy for the job and went with the first option to put the plug into the hole. Now I'm just waiting for it to cure and then I will try to mount it again

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electricskywalker t1_j9yf20m wrote

Hilti HY-200A adhesive with threaded rod. You can get threaded rod to match whatever anchor the shelves came with. For aerated concrete you should get the mesh sleeve as well. If its outdoor get the hot dip galvanized threaded rod.

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onlym3 t1_j9yqwi6 wrote

For oak I was always told to go for stainless rather than galvanised (idk if it's a US/UK nomenclature thing) as the oak will corrode anything other than stainless, particularly if there's likely to be any water involved. I have also confirmed this through slightly painful experience!

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nsa_reddit_monitor t1_j9yzwde wrote

Stainless steel is stainless steel, galvanized steel is steel with a zinc coating. Stainless is much more expensive but also more resistant to corrosion than galvanized, which costs almost the same as normal steel.

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LancsMak t1_j9z6dla wrote

Sort of. The tannins in oak will react with iron which is why stainless is recommended. You'll get unsightly black marks on the steel and the oak surrounding it.

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electricskywalker t1_ja196g3 wrote

TIL! Thanks that's great info. I really only deal with metal, but this could definitely be good to know in the future.

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GodlyLeach t1_j9zq3vo wrote

This, but I recommend something other than Hilti if you want to save some money. There are plenty of alternatives that will do the same thing without the Hilti brand premium you pay $$$.

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electricskywalker t1_ja353d5 wrote

You're not wrong that its expensive. I order pallets of it regularly for work and I've used it in this exact condition and had the connection engineered. I almost always go with what our engineer recommends, he is excellent.

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Familiar_Result t1_j9yc6bu wrote

If that isn't enough, you can try adding more brackets as well. If they are really heavy, you might just have to build proper supports that go to the ground.

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