I’m not sure what size wedge anchor I’ll need.Īs a rule of thumb, the space for the nut and washer is equal to the diameter of the wedge anchor being used. The 3/16″ Tapcon® concrete screw requires a 5/32″ bit, whereas the 1/4″ Tapcon requires a 3/16″ bit. Tapcon® concrete screws are threaded screws that tap into a predrilled hole in concrete, brick, or block. For a 1/4 Tapcon, what size hole do you drill? Concrete sleeve anchors can be used in concrete, brick or block but their holding values are less in terms of shear and pullout values. The wedge anchor, drop-in anchor and concrete strike anchor can only be used in solid concrete and have the highest & most consistent holding values in concrete. What makes a sleeve anchor different from a wedge anchor? Wedge Anchor Technical Specifications Size Every plate portion must also have an anchor bolt within 12-inches of the ends.įor a 3/8 concrete anchor, what size hole should I drill?Īnswers to Related Questions For a 3/8 wedge anchor, what size drill bit do I need? Similarly, what size anchor bolt do I require?Īnchor bolts should also be spaced 6-feet on center, with at least 2 anchor bolts per plate segment, according to the IRC. How much weight can a 3/8 drop in anchor support here?ģ/8″ Zinc Plated Drop-In Anchor, 100/Box, 10 ft./lbs.Īside from that, what is the minimum hole diameter for a female anchor? Because the authorized diameter of a female anchor is identical to the inner, or bolt diameter, utilized with the anchor, the diameter of the hole needed in the concrete is equal to the outer diameter of the anchor being placed. The answer will depend on the thickness of your concrete, but typically, you will need a 1/2-inch bit.ĭrop-In Anchor Technical Specifications Size The “1/2 drop in anchor drill size” is an important question to ask when you are installing a 3/8-inch anchor into concrete. This will be 3/8 inch in diameter, so you would use what’s called a “3/8 drop” drill bit. You need a drill bit that is the size of the anchor shank.
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