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Old 05-13-2013, 02:24 PM   #1
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Cure time before fastening


I just had a 6 inch curb added to my garage pad. I'm going to be fastening the walls with ramset nails. How long should I wait for the concrete to cure before adding weight and fastening?

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Old 05-13-2013, 03:37 PM   #2
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Cure time before fastening


You'll hear everything from a few hours, upward. I prefer to see at least a week... even two weeks, if time is not pressing, before ANYTHING is done on the slab.

Actual truth: My block people set several cubes of blocks on a two day-old slab, and before they could get set up and laid them, the weight had actually caused full 1/2" deep indentations in the slab.

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Old 05-13-2013, 05:28 PM   #3
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Cure time before fastening


If the concrete is quality, you'll see 75-80% of strength in 7 days. Since its often overspec'd anyway, and you won't be putting the full weight of the structure on it until well after that, go for it.
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Old 05-13-2013, 05:47 PM   #4
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Was poured this morning and was hoping to put the walls on it this weekend. Sounds like I should wait until at least next Monday...
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Old 05-13-2013, 06:48 PM   #5
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Cure time before fastening


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Was poured this morning and was hoping to put the walls on it this weekend. Sounds like I should wait until at least next Monday...

You'll be safe doing it on the weekend.
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Old 05-14-2013, 11:29 AM   #6
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Cure time before fastening


If you're just wanting to frame the walls this weekend, go for it. The concrete "could" likely support the entire structure in 7 days. Anything two dudes can lift into place won't put enough strain on it to cause any damage.
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Old 05-14-2013, 11:42 AM   #7
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Is it safe to ramset so soon? Don't want to blow chunks off.
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Old 05-14-2013, 11:55 AM   #8
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Is it safe to ramset so soon? Don't want to blow chunks off.
See? This is one of many reasons I don't suggest getting on a slab prior to at least a week passing. You never know WHAT the questioner has in mind doing. While anchor bolts should have already been installed in the concrete, this is not the case... and none of us knew that.
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Old 05-14-2013, 12:19 PM   #9
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Cure time before fastening


no anchor bolts for your sill plate?
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Old 05-14-2013, 12:33 PM   #10
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No anchor bolts. Mentioned in the first post I was going to do this.
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Old 05-14-2013, 12:47 PM   #11
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Cure time before fastening


didn't see anything about no anchor bolts in #1, I did read the comment on ramset. I've always seen ramsets used to fasten interior walls to a slab.

if it was mine I'd use something like the Simpson Titen Masonry Screw, but then that's me, this is yours and you can surely do it however you want. I'd do a test drill to see how the concrete was setting up first. Concrete cure times are not just based on time, but also temperature and humidity. Experienced concrete guys can look at it and know if it's set.

Good luck!
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Old 05-14-2013, 01:20 PM   #12
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Best thing now is to drill and epoxy bolts in, you don't say how large a structure this is,but ask your local building department how many are required and how far apart.
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Old 05-14-2013, 01:24 PM   #13
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This is a perfect example of why anchor bolts should be poured in place.

I was putting up walls 3 days after mine was poured...but I also had a 6" wide stem wall with the anchor bolts embedded....

By the time you finish those ramsets, all the walls could have been raised.
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Old 05-14-2013, 01:28 PM   #14
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Anchor bolts suck to lift large walls presheeted on top of. Best hold though.
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Old 05-14-2013, 01:32 PM   #15
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It wasn't that hard for me....I did most of mine by myself....and they were 2x6 walls.

Click on the Garage link in my signature for pics....

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