TinnerFlow™1st YearDuct AssemblyYELLOW · Check First
Lay the duct on a flat floor. Measure diagonally from corner to corner in an 'X' pattern. * If the measurements aren't equal, apply controlled body weight or mechanical pressure to the long diagonal corners while tapping the Pittsburgh seam with a mallet to reset the metal's memory back into square.
Lay the duct on a flat floor. Measure diagonally from corner to corner in an 'X' pattern. * If the measurements aren't equal, apply controlled body weight or mechanical pressure to the long diagonal corners while tapping the Pittsburgh seam with a mallet to reset the metal's memory back into square.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.