World War II[edit]
During World War II, the
Australian Army used containers to help more easily deal with various
breaks of gauge in the railroads. These non-stackable containers were about the size of the later
20-foot ISO container and perhaps made mainly of wood.
[11][
need quotation to verify]
During the same time, the
United States Army started to combine items of uniform size, lashing them onto a pallet,
unitizing cargo to speed the loading and unloading of transport ships. In 1947 the
Transportation Corps developed the
Transporter, a rigid, corrugated steel container with a 9,000 lb (4,100 kg) carrying capacity, for shipping household goods of officers in the field. It was 8 ft 6 in (2.59 m) long, 6 ft 3 in (1.91 m), and 6 ft 10 in (2.08 m)" high, with double doors on one end, mounted on skids, and had lifting rings on the top four corners.
[12][13] During the
Korean War the Transporter was evaluated for handling sensitive military equipment and, proving effective, was approved for broader use. Theft of material and damage to
wooden crates convinced the army that steel containers were needed.