Precision Core Drill of Charlotte

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What type of concrete anchor to use? Every once in a while on a construction site here in North Carolina we come across some other persons that also operator core drilling machinery and like all people, we are nosey so we stick around to catch a glimpse of how other core drillers use various core drilling anchoring methods and how they differ from our own when performing the same type of work. To our amazement, we have witnessed just about every type of machine that will run a wet or dry core drill bit. this includes the standard stand up rig, wall-mounted rigs, stair mounted rigs, directional rigs that core at almost any angle, and the handy but nevertheless efficient 4 1/2" grinder that a fellow was using one day that I swore could almost knock out 3-inch core drill holes in a 3rd story concrete floor as fast as we could with a stand-up rig. Without trying to argue with anyone we would ask why they used drop-in anchors instead of wedge anchors when mounting the base of the coring unit to the wall or floor. The most common reply was because that was what was supplied by the contracting company that employed them. Having met over 300 people in our line of work we don't mind sharing what we believe to be the best and safest way to make a small or large hole in the concrete. Wedge anchor vs Drop-in anchor In our opinion the pros of using wedge anchors over drop-in anchors is obvious. A 7-inch by 1/2 inch wedge anchor as pictured is driven into the concrete at least 4-inches. A drop-in anchor, which is not pictured because the boss man...