MSWE-42284 regarding indicating the usage rating

A chart showing load capacities for digger derrick use is near the lower controls or on the pedestal. Use this chart when lifting a load with personnel in the platform. A range diagram is also near the lower controls. If the unit is specified for platform use or combined digger derrick and platform use, a capacity chart and a boom angle indicator are visible from the platform. Use this chart when lifting loads with personnel in the platform. Sample placards and associated notes are shown in Figure 3.1. Refer to the placards on the unit for actual capacities.

The values on the load capacity charts reflect vehicle stability. The rated working load of the winch line may limit the loads lifted by the unit. The load capacity values show the maximum loads that may be lifted at regular intervals of load radius, through the full range of boom elevation, extension, and rotation, and still maintain vehicle stability. The operator can use the load capacity chart for digger derrick use or the boom raise capacity test to determine whether a load can be lifted.

Stability will be maintained if the values listed in the charts are not exceeded and the outriggers are properly positioned to level the unit as described in Section 6 under Outriggers. Use the load capacity chart as a guide when lifting a load and refer to other considerations listed in Section 3 under Capacity when using the capacity chart. The rated hydraulic capacity of the derrick only includes hydraulic and structural limitations and does not include stability factors. Some units may be able to lift loads exceeding the load capacity chart values and could become unstable. If this is the case, stability must be considered first. Position the unit as necessary for maximum stability.