Few names are taken in vain more often on job sites than architects' and designers'. And more often than not, these works are spoken while staring at a set of blueprints. So we turned to experienced framing contractors for their views on plans and the people who draw them. The wide-ranging question-and-answer session below features the comments of Enfield, New Hampshire's Fitzgerald Brothers (Jody, John, and their foreman, Wayne Findholt), who bring over 25 years experience to the job. Plans JLC: What percentage of plans that you deal with are free from error and can be built as drawn? Fitzgerald Brothers: "No plans are ever free from error, Can't be." JLC: What kinds of errors do you see the most? Fitzgerald