What is a required feature for all telescopic boom cranes?

For telescopic boom cranes, having a load chart is essential because it provides operators with crucial information regarding the crane's lifting capacities at various boom lengths and angles. This chart is a fundamental safety tool designed to prevent overload situations, which can lead to accidents or failures. Understanding the load chart helps ensure that operators do not exceed the crane’s rated capacities while lifting different loads in various configurations.

In addition to the load chart, it’s important for operators to be aware of other features such as boom angle indicators or remote controls, but these are not universally required for all telescopic boom cranes. The load chart, however, is a mandatory feature as it directly relates to the safety and operational effectiveness of the crane, ensuring that risks are minimized during lifting operations.