Apprentice question
Verify first
Verify before you commit. Cheap to catch now.
A bowed trapeze means the support span is not stiff enough for the load. Upgrade the support or add approved intermediate support before it distorts the duct.
['Wide duct on light strut can turn the trapeze into a sagging cradle. When the strut bows, the duct corners and bottom skin can distort.', 'Check span, duct size/weight, rod locations, and clearance. The usual recovery is heavier/deeper strut, back-to-back channel, shorter spans, a center rod, or a separate engineered support.']