In your initial survey of crane operations, look for crane stability, physical
obstructions to movement or operation, and proximity of electrical power lines,
as well as the following:
Leveling Has the crane operator set the crane up level and in a position for safe
rotation and operation?
Outriggers Are the outriggers, where applicable, extended and being used in accordance
with manufacturer's recommendations?
Stability The relationship of the load weight, angle of boom, and its radius (the
distance from the cranes center of rotation to the center of load) to the center
of gravity of the load. Also, the condition of crane loading where the load moment
acting to overturn the crane is less than the moment of the crane available to
Structural Integrity The crane's main frame, crawler, track and outrigger supports,
boom sections, and attachments are all considered part of structural components
of lifting. In addition, all wire ropes, including stationary supports, help determine
lifting capacity and are part of the structural elements of crane operations.