Can You Install A Lag Screw Into Concrete?
The short answer is Yes! You can install a Lag Screw into concrete. Installing a lag screw into concrete is not a difficult process but it does require an anchor to install properly.
Lag shields are concrete anchors that expand near the bottom to hold the shield inside of a drilled hole. They are made specifically for the installation of lag screws into masonry materials.
To install a lag shield into concrete first drill a hole that is the same diameter as the outside diameter of the lag shield. Before drilling you will also want to measure the length of the lag shield and drill down the length plus a little extra space .
Next take a hammer and tap the lag shield down into the hole you’ve drilled until its flush with the surface. Since the hole is the same size as the outer diameter, this should create a snug fit for the anchor.
Next make sure you have a lag screw long enough for the installation. For example, if you wanted to install a 2 x 4 to the lag shield, you would need to make sure the lag screw had 1-1/2″ of clearance and then about another 1″ to 1-1/2″ to install into the shield. This means you would need roughly a 3″ lag screw to complete this installation.
Once you have the proper lag screw, begin fastening the lag screw into the installed shield. This will push the lag shield apart in the hole creating a strong hold to keep your installation in place.