Drilling bottom plates, hole through concrete?

Old 10-27-14, 04:13 PM
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Drilling bottom plates, hole through concrete?

Hi everyone,

I'm in the process of developing my basement. I've been installing bottom plates over the past few days. I have a question about the implications of drilling a hole completely through the concrete basement floor when anchoring the bottom plates. To begin with, I was reasonably confident that my bit would not make it all the way through the 2x4 and the concrete. However, as I drilled some of the holes, they did feel somewhat "soft" at the end of the hole, and this now has me wondering.

I'm going to do some investigation into how thick my concrete floor actually is, but for now I'm curious: what are the short / long term implications if I did, in fact, drill some of my holes right through?
Old 10-27-14, 04:58 PM
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It could be a problem is there is a high water table. There is no reason to drill that far to anchor bottom plates.
Old 10-29-14, 09:13 AM
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pins resist lateral force,,, sole plates are also held in place by pressure of the 2x4's between the top & sole plate,,, there's no need to drill clear thru the conc floor,,, some guys drill a 1/4" hole & use 2 16p nails + const adhesive,,, we use lead drop-in's every 4'
Old 10-29-14, 11:26 AM
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Only need some Tap-Cons or even a Ram Set using the nails with built in washers will work.

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