1. Bolt too close to edge and contributes significantly to capacity of bolt group. Investigate possibility of planing for small error. For significant error, check vertical bolt spacing to determine if bolt(s) can be added within splice plate. May need to revise splice.
2. Bolt too close to edge and near neutral axis so it primarily carries only vertical shear. Consider planing edge for small error. For larger errors, check design loads on bolts to determine if the errant bolt can be neglected before revising entire splice.
3. Interior bolt. Check if spacing still satisfies AASHTO requirements to leave as is. If it is too close to adjacent bolt, consider leaving hole unfilled (in web) and adding a hole as close as possible to correct location. If holes overlap (looks like a snowman) in web only, splice plates will cover like a hardened washer. Consider as an oversize hole and check allowable vs. calculated load.