Applies to the construction, installation, operation, inspection, and maintenance of crawler cranes, locomotive cranes, wheel-mounted cranes, and any variations thereof which retain the same fundamental characteristics. The scope includes only cranes powered by internal combustion engines or electric motors. Side boom tractors and cranes designed for railway and automobile wreck clearance, digger derricks cranes manufactured specifically for, or when used for, energized electrical line service, knuckle boom, trolley cranes, and cranes having a maximum rated capacity of one ton or less are excluded. Special adaptations to the general type of machines covered by this volume, where applicable, fall under this scope. Some basic machine types within this scope are convertible for excavating work and other uses not considered to be lifting service. The requirements of this volume are applicable only to such machines when used as lifting cranes.