Does anyone else find it odd that AISC wants an AISC Certified Fabricator to provide Objective Evidence that the "period of effectiveness" has not been exceeded for welder, welding operator and tack welder qualifications?
According to AWS D1.1 a tack welder is eligible to perform tack welding indefinitely unless there ia specific reason to question the tack welder's ability.
How much Objective Evidence does some one need to prove to some one else that the indefinite "period of effectiveness" has not been exceeded?