Always stay within the rated capacity. Operators must reduce th load capacity under adverce field conditions until, it is determined, the machine can safety handle the lift. Loads shall not be allowed to exceed rated load capacity and working radius. Do not use counterweights heavier than the manufacturer's recommended weight. Even a light wind can blow the load out of control, collapse booms, or tip machines.
Winds aloft can be much stronger that at ground level.
Proper precautions shall be taken when the velocity of wind exceeds 20 mph. Crane capacity can be adversely effected when the machine set is not level. Do no lift loads when winds create an unsafe or hazardous condition. Booms should be lowered, if possible, under high wind conditions. Foot pedal brake locks are furnished on some cranes to allow the operator to rest his legs when suspending the load for short periods of time.