Apprentice question

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Why do trapeze hangers need lock/jam nuts?

Single nuts can walk under vibration. Use the proper support nut and lock/jam-nut setup at the rod/strut connection per shop standard.

['You assemble a dual-rod Unistrut trapeze hanger bracket on the ground, threading the lower nuts tightly onto the bottom of the strut rail, but you forget to install the secondary top backing jam-nuts against the channel face.', 'Single nuts can walk under vibration. Use the proper support nut and lock/jam-nut setup at the rod/strut connection per shop standard. The likely recovery is to check the condition, correct prep/setup if it is within your assignment, and bring the foreman clean information before the work creates rework overhead.']

Hangers, Supports, Rods & Trapeze 1st Year YELLOW

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