this post was submitted on 29 Dec 2024
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DIY

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submitted 7 months ago* (last edited 7 months ago) by deathbysnusnu@lemmy.world to c/diy@lemmy.world
 

Hello all,

I have been tasked by the wife with putting up her new mailbox. It weighs in at a hefty 40 kgs. It came with a base plate with 4 holes to attach it to something on the bottom. I was going to make up a quick concrete slab but is a complete newb in that regard.

Please help;

Should I put some bolts in the concrete before it cures or should I drill the concrete after it's cured and put some bolts in then?

There is some existing concrete in the spot from the post of our previous mailbox, is it ok to just cover that over with the new concrete?

Will it be enough to just make a box shape with some scrap wood for the form or should I get something else? Being a 40 kg monster, how thick should I make the slab?

Any other advice?

Thank you in advance!

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[–] MysteriousSophon21@lemmy.world 1 points 2 weeks ago

Definitely go with anchor bolts set BEFORE the concrete cures - just position them where you need em, let the concrete set around them, and you'll have a much stronger connection than drilling afterwards (plus it's waaay less work than messing with epoxy or concrete screws).