GB/T 4857.11-2005 is part 11 of the basic test standard for transported Encasement parts, which is aimed at the horizontal impact test method. The standard aims to simulate the horizontal impact of Encasement parts during transportation and evaluate the protection performance of Encasement. It specifies the test equipment, such as pendulum Impact Tester, etc. It specifies the test steps, covering the preparation of Encasement parts, the setting of test parameters, the impact operation and the result analysis. Testing according to this standard can provide the basis for the optimization of Encasement design, to ensure that Encasement effectively protects the contents in a horizontal impact environment, reduces the damage caused by Impact during transportation, and ensures the smooth flow of goods.