In vehicles only partially loaded, horses and cattle were to be taken as 508 kg each, calves as 101 kg each, sheep as 38 kg each and pigs as 51 kg each. Therefore, if a train was scheduled to convey, say, 20 M wagons loaded with cattle and 20 L wagons loaded on both levels with pigs, plus a Z guards van, the total weight of the train would be (9+6)*20+(7+10)*20+(13+5) = 618 tonnes.