TinnerFlow™3rd YearYELLOW · Check FirstParallel Offset Layout
Parallel offsets do not always use identical travel pieces. The outside run travels a longer centerline path, so spacing has to be laid out from pipe centerlines, not copied by eye.
When two parallel round runs offset around the same obstruction, the outside run has to take a wider path. If both travel pieces are cut the same, the runs can pinch together or collide at the turn.
Lay out both pipe centerlines, preserve the required spacing through the offset, and adjust the outside travel length to match the larger path. Check hanger positions before fastening so the two runs stay parallel.
Do not copy the inside travel length onto the outside run without checking centerline geometry.
Parallel offsets that pinch together cause clashes, bad clearance, and awkward rework after the line is already hung.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.