Where is the signal chart required to be posted according to OSHA?

The signal chart is required to be posted on the equipment or in the work area to ensure that all personnel involved in the operation can easily reference it. This placement is critical because it allows signal persons, operators, and ground crew members to have immediate access to the necessary signals used for safe communication during the lifting and handling of loads. Having the chart in the work area promotes safety by minimizing misunderstandings and miscommunications, which can lead to accidents and injuries. It ensures that everyone is aware of the signaling system being used, facilitating a coordinated and efficient response during lifting operations.

The other options, while they might seem logical in some contexts, do not provide the same level of accessibility for all individuals involved in the operation. For instance, posting the chart in a control room or operator's cabin may limit visibility for ground personnel or those directly working in the vicinity of the equipment. Similarly, a site office location would not be practical for real-time operations taking place in the field.