RFID tags are used for shipping, receiving, stock control, received goods, storage yard locations, etc. Tags are read directly off the transport without workers having to unload and sort through the shipment. On construction projects, the gate person reads the cards and directs the driver to the assigned lay-down / storage area. When it is time to withdraw the items for construction, the driver drives down the lane-way, identifies the items by RFID and loads them up to deliver them to the prescribed location. It includes all types of building and construction materials.
Likely, their RFID reader is more powerful than what is used at checkouts, but it is all the same principle of reading and recording data.
On a side note, I have been told if you put 2 RFID cards together in your wallet, the reader gets confused. Whether this is true or not, I can't verify it. Someone should do a test and report back.