This standard specifies the types and basic parameters of electric hoist gantry cranes. This standard is applicable to cranes with working levels A2 to A5, the lifting mechanism (electric hoist) trolley runs on the lower flange of the main beam, and the retrieval device is a hook, grab bucket or electromagnetic suction cup. This standard does not apply to cranes that work in environments with flammable, explosive and corrosive gases and lift hot items above 300°C and other dangerous items.