Dust, humidity and a second lift
Open cabinets take mill dust on the floor. Year-round humidity wets unpainted ferrous overnight. If a restow is confirmed in the booking, the cover has to survive a second crane, not only the factory lift. The survey records cleanliness of the hall, photographs of cabinets and bases, expected terminal time, and the handling that is actually booked. Preservation is written after those facts.
Electronics and control racks are candidates for a sealed wrap before timber is cut, so shop dust does not travel with the cabinet. Ferrous frames still take VCI where bright metal is exposed. Electronics and exposed ferrous equipment are packed separately where their cleanliness and corrosion-control requirements conflict. Whether a full barrier and desiccant belong in the pack depends on dwell and whether the box will sit in Tuas air. A compact load that stuffs the same day into a dry receiving hall may need less. That is a survey call.
Aisle width, dock height and floor loading set crate size as much as the machine does. Fork pockets and lift points are checked against the handling that is actually booked, including a terminal restow when that is known.