GB/T 21583-2008 "Dangerous goods, large Encasement stacking test method" stipulates the equipment, sample preparation, test steps and test report of the large Encasement stacking test of dangerous goods, and is formulated with reference to the relevant documents of the United Nations. Applicable to the stacking test of various types of dangerous goods large Encasement, it can evaluate the safety and Reliability of large Encasement in the case of stacking, provide a technical basis for ensuring the mass of Encasement during the transportation and storage of dangerous goods, and help to standardize the stacking test operation of dangerous goods large Encasement.