Split drives in concrete
#1
11-29-13, 11:47 AM
Split drives in concrete
I am using 3 inch split drives on a basement slab. I put tape at the 3 inch mark on the bit when drilling through a 2x4 and slab. In a few places I felt the bit go right through the bottom of the slab or at least I think I did in some spots. Hammering these split drives in they are very tight in the hole and you really have to whack them in. I have a walkout basement and don't expect water under my slab but wondering are the 1/4 inch split drives water sealed?
#3
11-29-13, 02:34 PM
Banned. Rule And/Or Policy Violation
Might want to share what it is your really trying to do.
If your trying to set bottom pressure treated bottom plates no way would I be using what your calling split drives.
Tap-Cons or Ram sets will work and not go through the slab.
If your trying to set bottom pressure treated bottom plates no way would I be using what your calling split drives.
Tap-Cons or Ram sets will work and not go through the slab.
#4
11-29-13, 06:36 PM
Yes I was anchoring sill plates. I was pre drilling the 1/4 inch hole and felt the bit go through. Then hammered the 1/4 inch fastener in the hole. The anchor didn't go through it was the bit that drilled through.
#5
11-30-13, 12:57 AM
Member
I suspect your "split drives" in through-holes are not designed to resist any amount of water pressure, when the water table under the slab rises due to a plumbing leak or other factors you won't have control over. Install a stop sleeve on your masonry bit the next time you drill any slab holes, and more importantly, don't use fasteners that require close to 4" of embedment.
There's also the possibility that your basement slab has a lot of depth variation, with portions being considerably thinner than the 3-1/2" to 4" normally called for. I've removed portions of slabs that ranged from only 2-1/2" to 6" thick, when 4" was the code-specified value.
There's also the possibility that your basement slab has a lot of depth variation, with portions being considerably thinner than the 3-1/2" to 4" normally called for. I've removed portions of slabs that ranged from only 2-1/2" to 6" thick, when 4" was the code-specified value.
#6
11-30-13, 02:41 AM
Thank you for the response. I had a 3 inch piece of tape marked on the bit but as I drilled the tape slid up the bit. I should be good. Water table is low. I don't even have a sump pump because being a walkout the slab is even with outside grade. I learned a lesson though.
