Volume B30.4 includes provisions which apply to the construction,installation,operation,inspection and maintenance of electric motor or internal-combustion engine powered portal tower, and pedestal cranes that adjust operating radius by means of a boom luffing mechanism or by means of a trolley traversing a horizontal boom, that may be mounted on a fixed or traveling base, and to any variation thereof that retain the same fundamental characteristics. This volume applies only to portal power, tower, and pedestal cranes utilizing a drum and wire rope for hoisting and which are used for hoisting work. The requirements for construction tower cranes (refer to ASME B30.3), telescopic boom cranes, twin boom container handling cranes, and knucklebroom cranes are not included in this volume.