Crane operation process to prevent jostling

Hoist equipment process to prevent telescoping crane safety rules regulations,  rope hoist  hanging objects through the center of gravity and perpendicular to, that allowed oblique oblique hanging. If the oblique hanging, not only will cause overload rope to pull off, and make heavy swing jostling objects and people,

Causing personal injury and  Wire rope hoist  accidents.
Assuming the weight lifted from the ground as Q of objects, vertical lifting, rope tension is equal to Q S as long as or slightly larger than Q, the weight can leave the ground.
However, if the oblique, and the ground wire to the vertical at an angle. According to mechanics, the role of the tension on the rope S, so that the object can be decomposed into a vertical upward force P and the horizontal movement of the force F, to make the object hanging from the ground, P at least equal to Q.
F same as the angle increases. That is, the larger the angle oblique hanging in the lifting heavy objects the same time the greater the force rope. So, if a full load when lifting heavy objects vertically, then diagonally hanging inevitable when overload occurs even pulled off rope Accidents.
In addition, the oblique hanging horizontal force generated when the F, when the heavy left front also subject to the effects of friction. After leaving the ground a moment, would object to the vertical center of the swing, it is possible and hang hanging personnel, operations personnel, or other objects around the jostling caused by accidents.