Where is the least capacity of a typical truck-mounted crane without a forward outrigger observed?

The least capacity of a typical truck-mounted crane without a forward outrigger is observed over the front of the crane. This is due to the configuration and engineering of the crane, which is designed to have its maximum lifting capacity when the load is positioned over the rear or the side, where the outriggers provide additional stability and support. When a load is lifted directly over the front, the crane relies solely on its rear stability, which is not as supportive as when the load is positioned over the outrigger.

In contrast, the rear and side positions benefit from the crane's designed load distribution and support, especially when outriggers are deployed. This makes those positions more favorable for lifting heavier loads. The midpoint also offers a more stable configuration compared to the front, which can lead to reduced capacity. Thus, the significant effects of geometry and weight distribution contribute to why the front of the crane has the least lifting capacity without the assistance of additional outrigger support.