The ore is carried in class Uad/Uadp hopper cars with 80 metric tons capacity and 20 tons tare weight. A loaded train headed by Dm3 typically carries 52 cars, giving a total weight of 5200 tons. Standing a few meters away from an train passing at good speed is an extraordinary experience...

Although taken from an empty train passing, get a feeling of the sound by listening to the sound clip at: http://web.telia.com/~u77503725/mp3/Kat-Bjf.MP3 (MP3-file approx 720k).