Standard Hole size for Anchors Ask HILTI
Under sized drill hole Hello I have an anchor installation with 1 3 8 quot bars that had 1 1 2 quot holes I could not find the hole diameter recommended for bars larger than 1 1 4 quot in the technical guide for larger diameter anchor rods I am assuming that the recommended hole would be 1 5 8 quot Is there an approach for determining reduced bond capacity