From 1950, it was found that more capacity was required for cement powder transport from Fyansford to Bandiana for the Kiewa Hydroelectric scheme. To answer the call, a class of wagons was constructed and it became known as the CJ class. Deliveries occurred at a rate of roughly 1-2 wagons per month until CJ 20 was delivered in mid-July 1952. Further wagons were delivered in two batches, with 21-30 arriving 1954–1955, and 31-97 arriving 1957–1961.http://victorianrailways.net/freight/freight%20pages/cj/cj.html
