In which operating area do boom trucks generally not have capacities?

Boom trucks typically do not have capacities for lifting loads over the front due to the design and structural limitations of the vehicle. When lifting over the front, the weight and stress are concentrated at the forward section of the boom and the truck's frame. This can lead to instability, as the center of gravity shifts beyond the safe limits of the truck. The boom may not be engineered to handle the dynamic loads and forces exerted in this direction, which also affects the lifting capacity and safety.

In contrast, boom trucks are often rated for capacities when operating over the rear and over the side, as these configurations align better with the distribution of weight and stability of the vehicle during operations. The design of the boom and the structural integrity of the truck can support such movements without compromising safety or lifting efficiency. Under the boom area may also be an operational zone where the truck can handle loads safely, provided that the load is within the specified limits and the operation is conducted according to safety protocols.