Based on AISC oversize holes, the Structural Steel Educational Council recommendations, and concrete contractor anchor-bolt placement techniques, ASCC concrete contractors recommend the following toler-ance for each bolt location: 3/4- and 7/8-in.-diameter bolts: ±1/4 in.; 1-, 1-1/4-, and 1-1/2-in.-diameter bolts: ±3/8 in.; and 1-3/4, 2-, and 2-.