1. When gantry crane lifting the heavy objects for the first time in each duty (or the max load weight), lifting the heavy objects tp 0.5m above ground, lower and put down the object to check the brake performance, confirm the reliability, and then perform normal operation .
2. During the operation, the gantry crane operator should press the alarm button under the following operation
* Lifting, landing heavy objects; start driving the crane traveling machine.
* Gantry crane operator sight is not clear, to continuous ringing alarm;
* Gantry crane travels closer to another gantry crane.
* When lifting heavy objects close to the staff.
3. The gantry crane operation should be unified command signal.
4. When a sudden power failure, all gantry crane controller handles should be placed in the "zero" position and should check for proper movement before returning to work.
5. When gantry crane and its trolley in normal operation, if need to change the working direction, should wait the gantry crane totally stop then press the reverse direction button.
6. If the gantry crane has two hooks, the main and auxiliary hook must work alone, so as to avoid the collision. Double hook gantry cranes are not allowed to hook two objects hanging at the same time.
7. Do not allow to use position limiter to park the gantry crane, strictly prohibit adjust hoist brake in the case of a load.
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