AZ ROC C-45 Sheet Metal Practice Questions - Arizona ROC C-45 Sheet Metal Examination Exam

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When installing flexible air ducts, what is the maximum allowable sag permitted per foot of distance between support hangers according to SMACNA and IMC guidelines?

1/2 inch per foot 1 inch per foot 1/4 inch per foot 2 inches per foot

Correct Answer:

1/2 inch per foot

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