The load weight is known before the pick.
The chart or the marked capacity covers this load and this configuration.
One signal person is named and the operator can see that person.
A tag line is used and nobody stands under the load.
Wind is inside the limit written on the lift plan.
A lift over 75 percent of capacity, a two-crane lift, or a lift over people is on the critical lift plan.
The lift stops when the load, the radius or the path is not what the plan says.