Tapcon+ Screw Anchor - Technical Data Characteristic Symbol Units Nominal Anchor Diameter (inch) 1/2 Location of installation - - Lower Flute Upper Flute Minimum hole depth hhole in. 2 1/2 4 1/2 2 1/2 Nominal embedment depth hnom in. 2 4 2 Minimum effective embedment depth hef in. 1.32 3.02 1.32 Characteristic pullout strength, uncracked concrete over metal deck Np, deck,uncr lbf 1,720 4,950 2,405