What must the crane assembly area be?

The crane assembly area must be a firm and level surface to ensure the stability and safety of the crane during operation. A firm surface provides the necessary support for the weight of the crane and prevents it from sinking or shifting under load, which could lead to equipment failure or accidents. A level surface helps maintain the crane's balance, reducing the risk of tipping or swinging loads unexpectedly, which can pose serious safety hazards to workers on site.

Other characteristics, such as being well-lit or spacious, are certainly beneficial for operations but do not directly address the foundational stability required for crane assembly. A rugged or sloped area would introduce unnecessary complications and risks, as these conditions can lead to instability and increased potential for accidents. Similarly, while being within a protected zone is important for site safety, it does not directly contribute to the physical support and balance of the crane itself. Thus, the requirement for a firm and level surface is essential to ensure the safe operation of cranes.