As you tighten the nut it draws the bolt upward and spreads the anchor out which makes a very tight fit in the concrete.
How to secure half wall to concrete floor.
Be sure to wear safety goggles when hammering masonry nails into concrete.
They can be used in concrete block and brick.
I m using 3 8 diameter bolts that are 3 long.
Choose a length that will penetrate the concrete at least 1 inch.
Both hex head and phillips head styles are available.
I use tapcon concrete screws to secure the wood to the floor.
Setting up a wall on a concrete floor presents a bigger challenge than merely nailing into a wood subfloor.
In this video i show you the method that i use to attach basement framing to a concrete floor.
One half inch of penetration prevents shifting so drive 2 inch nails.
Concrete screws come in 3 16 and 1 4 inch diameter in lengths up to 3 3 4 inches.
Some concrete nails are the cut nail design shown in the photo with a thick flat shank and a tapering v profile.
One method that works extremely well if the floor joists and half wall line up to install 1 2 plywood over the wall and down past the subfloor and onto the floor joist.
Another method is to run the half wall 4 4 outer post down into the framing and to bolt it to a joist or similar blocking and use 2 1 2 through bolts to attach 4 4.
Fortunately there are plenty of solutions.
The idea is to drill a hole in the cement then drive these down.