How deep should a concrete anchor go?

When installing a wedge anchor, it's important to have a minimum of 2-1/2 inches embedded into the concrete. There should also be at least an inch exposed, enough for the attaching material to grab onto.

albanycountyfasteners.com - How To Install Wedge Anchors - Albany County Fasteneres

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Installing Wedge Anchors in Concrete

Wedge anchors are fasteners designed for use in masonry materials (most commonly concrete) and used to secure materials and equipment. Concrete wedge anchors are designed to go into a pre-drilled hole and expand, creating a grip so they cannot be “pulled out” or removed. Today we will be reviewing the proper installation of a post base into a concrete floor.

What will you need?

Before we begin let’s make sure we have the proper tools for the job.

Step One

The first thing you need to do when installing a wedge anchor is choose the proper anchor material. Wedge anchors come in many materials and all serve different purposes. Stainless steel and hot dip galvanized are two very popular wedge anchor materials, but the correct material varies by application. Not sure what material you need? Check out our Material Guide to learn about all the different materials available.

Step Two

Once you’ve chosen a material, its time to get your drill ready. When installing a wedge anchor, it’s important to have a minimum of 2-1/2 inches embedded into the concrete. There should also be at least an inch exposed, enough for the attaching material to grab onto. To measure ours, we placed the wedge anchor about an inch below the tip of the SDS drill bit and then used blue painters tape to mark off the drill where we should stop drilling. Marking the stop point with blue tape will allow you to drill consistent holes and prevent you from over/under drilling.

Step Three

Now that we’ve applied our drill bit with tape, its time to begin the drilling. BUT NOT SO FAST. First we need to put on our safety goggles and gloves, always wear safety gear when cutting. Now that you are safe and ready to work, simply apply pressure to the place you want to drill and let the bit begin to do its work. Once your drill bit reaches the blue painters tape, you will know that the hole has reached the necessary depth and you can stop drilling.

Step Four

Carefully brush away any of the debris from drilling to clear the hole and begin installation of the anchor. The next step is to insert the masonry anchor into the hole. It should be a very tight fit and will need to be hammered into place. The end result should leave about an inch (or more depending on how much room you need) above the surface to allow for anchoring. Now that the anchor is installed we can apply the post base, square washer, and nut to the wedge anchor. After placing them on, you screw the nut onto the wedge anchor creating a strong, sturdy anchoring station. Now that you’ve completed the installation, take a step back and admire your handiwork. This post base is now ready for the next step in your building project.

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