Parallel 45-degree offsets collide because both travel pieces were cut the same
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.
Do not copy the inside travel length onto the outside run without checking centerline geometry.
Check
Mark both pipe centerlines through the obstruction.
Measure centerline spacing between the parallel runs.
Lay out inside and outside travel lengths separately.
Check clearance between elbows before locking joints.
Verify both runs stay parallel after hangers are tightened.
Steps
Mark both pipe centerlines through the obstruction.
Measure centerline spacing between the parallel runs.
Lay out inside and outside travel lengths separately.
Check clearance between elbows before locking joints.
Verify both runs stay parallel after hangers are tightened.
Say this to your foreman
The two parallel spiral runs are colliding at the 45 offset because the travel pieces were cut the same. I laid out the centerline spacing and outside travel correction. Do you want me to recut the outside spool?