Crane main performance parameters indicators: The main parameters characterizing crane crane main technical performance indicators parameter 20 t cranes for sale, is based on a crane design, but also the heavy machine safety technical requirements of an important basis. Starting weight: Starting weight lifting weight refers to the weight of the unit is kg or t. It can be divided into nominal weight, maximum weight, from the total weight, effective from the weight and so on. Crane main performance parameters indicators: starting weight. Total lifting weight: from the total weight of the crane can lift the material along with the spreader and can be divided into long-term fixed on the crane spreader and drama (including hooks, pulley blocks, hoisting rope and the crane trolley following other lifting objects ) The total mass.