Used to establish a safe passage between the platform and the tanker. Consist of the step, handrail, spring cylinder balance system and so on. Steps are made of dentiform grid plate, preventing the operator from falling while raining, snowing or in greasy condition, the structural is very solid, designed to bear more than 300 kg. Different types of two-step ladder, three-step ladder, four-step ladder and five-step ladder according to the specific size of the site could be chosen.