What’s the notice during the operation of MG Double Girder Gantry Crane?

Precautions：
At the job site, when the MG double-girder gantry crane stops working, the user should lock the crane in time. There are no wires above the main switch of the crane. It is strictly forbidden to be used for dangerous operations such as lifting high-temperature molten liquid, flammable, dry, corrosive, overloaded, and dusty. The total length of the overhang of the door machine is less than 1/3 of the total span, and the limit of the overhang is Gn90%, and the heavy objects can only be operated by moving the heavy objects inside the outriggers. The Gn of the heavy objects that must be run on the cart outside the legs is reduced by 10~20%. When the overhang exceeds 1/3 of the mid-span, the Gn is reduced in stages. In the above cases, the heavy objects can only be operated close to the outrigger cart. Small spans are not suitable for running outside the legs, and the wind pressure is less than 150Pa.