In the heavy lifting industry, a gantry crane is often defined by its maximum capacity—the bold tonnage figures painted on its girders. However, for a facility manager or an engineer, that number is only a baseline. The true measure of a crane's value lies in its Duty Class . Whether you are following ISO 4301-1 or GB/T 3811 standards, the classification from A3 to A8 represents the machine's "DNA." It determines how many hundreds of thousands of cycles the crane can perfo
