1. The altitude of the place where the crane device is used shall not exceed 2000 meters. If the altitude exceeds 1000 meters, the motor capacity shall be checked.
2. The ambient temperature for normal operation of the crane shall be within - 20 + / - 40 ℃, and the average temperature within 24 hours shall not exceed 30 ℃.
No inflammable, explosive or corrosive gas is allowed during operation
4. The radiant heat of lifting objects on the crane hook shall not exceed 300 ℃ < br / >
5. When the crane is not in operation, the wind pressure shall not be greater than 150 PA inland and 250 PA coastal < br / >
6. The wind of crane in non operation state shall not be greater than 800 PA < br / >
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7. Master the operation site environment, determine the transportation route, level the operation site and remove the surrounding obstacles. At the operation site, it is necessary to ensure that the rigger and crane driver can clearly observe the operation site conditions. If the construction is carried out at night, sufficient lighting conditions shall be ensured.
8. The ground of the operation site should be solid and not sunken, and the soft ground should be padded with wooden boards or sleepers under the legs. After the outrigger is stretched out and padded, the crane shall be kept level.
9. Carry out safety inspection on the cranes and lifting tools in use. The safety devices, alarm devices and brakes must be sensitive and reliable.
10. The range of possible movement (rotation) of crane, boom and counterweight, and the range of possible falling of lifting objects are all dangerous areas. Fences or warning signs shall be provided.
