Which organization prohibits storing anything on top of the elevator car?

The organization that prohibits storing anything on top of the elevator car is ASME, which stands for the American Society of Mechanical Engineers. ASME sets forth safety standards and guidelines for the design, construction, and maintenance of elevators and escalators. These guidelines ensure the safety of both the equipment and the individuals who use or service it.

The prohibition against storing items on top of an elevator car is rooted in safety concerns, as any additional weight or loose items could lead to equipment malfunction, pose a risk during operation, or endanger personnel working on or around the elevator. By adhering to ASME standards, professionals can create a safer work environment, reducing the risk of accidents related to elevator operation and maintenance.

The other organizations mentioned each focus on different aspects of safety and engineering regulations in various fields, but it is ASME's specific standards regarding elevator operation that address this particular safety issue.