Gantry crane is also A gantry crane working level A: it reflects the crane in the state of load and the use of two aspects of the busy working characteristics.
The division of working level is determined by the utilization grade U and load state Q of the crane.
They are divided into eight levels, A1 ~ A8.
The working level of the crane, that is, the working level of the metal structure, according to the lifting mechanism, divided into a1-a8, if compared with the crane work type stipulated in China, roughly equivalent: a1-a4-light;
A5 - A6 -;A7- heavy, A8- extra heavy.