Safe Load Indicator (SLI): The Safe Load Indicator (SLI) is a fundamental safety device used in crane operations to prevent overloading. It constantly monitors the load being lifted, providing real-time feedback to the operator. If the load approaches or exceeds the safe limit, the SLI alerts the operator through visual or audible signals. To enhance safety further, operators should undergo thorough training on how to interpret SLI readings and respond appropriately to alerts. Additionally, regular maintenance and calibration of the SLI are essential to ensure its accuracy and reliability.

Automatic Safe Load Indicator (ASLI): The Automatic Safe Load Indicator (ASLI) builds upon the capabilities of the SLI by incorporating automatic adjustments based on load conditions. In addition to monitoring the load capacity, the ASLI can automatically adjust crane operations to maintain safe load handling. To maximize safety, operators should still remain vigilant and be prepared to override automatic adjustments if necessary. Regular inspections and testing of the ASLI's automatic functions are critical to ensure they operate correctly and do not compromise safety.

Load Moment Indicator (LMI): The Load Moment Indicator (LMI) is another crucial safety device in crane operations. It measures the crane's lifting capacity based on factors like load weight, boom length, and angle. The LMI warns the operator if the load moment approaches unsafe levels, preventing tip-overs and ensuring safe crane operations. To enhance safety, operators should undergo thorough training on how to interpret LMI readings and understand their implications for crane stability. Regular inspections and maintenance of the crane's structural components are also essential to prevent failures that could compromise safety.