Concrete is everywhere and while the professionals use many methods to connect with concrete, concrete bolt anchors are basic and simple enough for the do-it-yourself application at home. If your home is built with concrete block you know the problems this creates. Something as simple as hanging pictures can be frustrating. A basic anchor — a small version — can do the job. These anchors are also commonly used to fasten lumber to concrete walls.

If you have a project requiring concrete bolt anchors, here is how to proceed:

1. Determine the thickness of the stock you are using. If it is a treated 2×4, for example, you will need a bolt anchor with a length of about 3″ inches.
2. Are you going into solid concrete? If so, use a concrete bolt with a wedge anchor. If you are going into block you may use one with a sleeve anchor. Both serve to secure themselves in the concrete when the bolt is tightened.
3. Drill a full-sized hole in the board first and mark your placement holes on the concrete.
4. Using a masonry bit, drill a pilot hole in the concrete with a small bit — say 1/8″, preferably with a hammer drill.
5. Next, move up in size and continue with drilling until the hole is the correct diameter for the bolt you are using. BE SURE to go the proper depth as well!
6. Now you are ready to attach the 2×4. Have a helper hold it in place while you lightly tap the bolts into their holes and then tighten them with a good socket wrench.

One very common use of concrete anchor bolts is for attaching bottom wall plates to the foundation. In nearly all of these cases, the anchor bolts are set in the footer or pad when still wet. Then holes are drilled in the plate, it is set over the anchors and fastened into place.

Concrete anchor bolts have many good uses and a variety can be found at any good hardware or lumber store.

Note: For a variety of lighter applications and more convenient use, try using a Tapcon screws.

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