Apprentice question
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An off-center lower duct can twist the rods and strut. Rebalance the load or add an approved support rod on the heavy side.
['A two-tier trapeze needs the load carried inside the rod span. If one line hangs far off to one side, the whole assembly becomes a lever.', 'Check the load center, rod plumb, strut rotation, and duct clearances. Recovery may be re-centering the lower duct, adding a third rod, splitting the support, or building a separate trapeze.']