Final answer:
A pre-work shift visual inspection of cranes must be performed by a qualified individual, usually a crane operator or a designated competent person with relevant knowledge and experience.
Step-by-step explanation:
A pre-work shift visual inspection of cranes must be performed by a qualified individual. This individual is often referred to as a crane operator or a designated competent person who has the necessary knowledge, training, and experience to identify potential hazards. The inspection includes checking for any malfunctioning parts, wear and tear, the integrity of the crane structure, and ensuring that all safety devices are functioning properly. The goal of this inspection is to ensure operational safety and to prevent workplace accidents. It's crucial for maintaining safety standards and is typically required by occupational health and safety regulations.