There are multiple Structural Steel, Conductive Coils and Industrial Adhesive articles in your Warehouse during the Train Yard Event because there are different quality types (e.g., base Structural Steel, Structural Steel Star 1, Structural Steel Star 2, Structural Steel Star 3).

Some Jobs might require Structural Steel of higher quality than players have available in their Warehouse. To produce Structural Steel of higher quality, please proceed to your Logistics Center Event Factory (found in your Station) and Upgrade your Factory. The Upgrade button will show you the necessary requirements for the upgrade so that you know what you need to progress forward.

When completing Export Jobs and you do not see your produced items in the Warehouse, please make sure you have produced the required items for the Export Job (e.g. Conductive Coils - base quality - are not the same as Conductive Coils Star 1.
To produce upgraded items in the factory, please upgrade the factory by completing Missions and earning Hydraulic Grapple.

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