ASME B30.4:2010 pdf download

ASME B30.4:2010 pdf download.Portal and Pedestal Cranes
Volume B30.4 includes provisions that apply to the construction, installation, operation, inspection, and maintenance of electric motor or internal-combustion engine-powered portal and pedestal cranes that adjust operating radius by means ofa boom luffing mechanism or by means of a trolley traversing a horizontal boom, that may be mounted on a fixed or traveling base, and toanyvariationthereofthatretainthe same fundamental characteristics. This volume applies onlytoportal and pedestal cranes utilizing a drum and wire rope for hoisting and that are used for hoisting work. The requirements for tower cranes (refer to ASME B30.3), telescopic boom cranes, twin boom container handling cranes, and knuck- lebroom cranes are not included in this volume.
luffing crane: a crane with a boom pinned to the super- structure at its inner end and containing load-hoisting tackle at its outer end and with a hoist mechanism to raise or lower the boom in a vertical plane to change load radius (see Figs. 4-0.2.1-1, 4-0.2.1-2, and 4-0.2.1-3). pedestal crane: a crane consisting ofa rotating superstruc- ture with operating machinery and boom, all of which is mounted on a pedestal (see Fig. 4-0.2.1-1). portal crane: a crane consisting of a rotating superstruc- ture with operating machinery and boom, all of which is mounted on a gantry structure, usually with a portal opening between the gantry columns or legs for traffic to pass beneath the crane. The crane may be fixed or on a traveling base (see Figs. 4-0.2.1-2 and 4-0.2.1-3).
accessory: a secondary part or assembly of parts that contributes to the overall function and usefulness of a machine. administrative or regulatory authority: governmental agency or the employer in the absence of governmental jurisdiction.appointed: assigned specific responsibilities by the employer or the employer’s representative. authorized: approved by a duly constituted administra- tive or regulatory authority. axis ofrotation: the vertical axis around which the crane superstructure rotates. bogie: an assembly of two or more axles arranged to permit both vertical wheel displacement and an equal- ization of loading on the wheels. boom: a member used for supporting the hoisting tackle, hinged to a fixed or rotating structure or to a mast, with its outer end supported by ropes, chains, rods, or hydraulic cylinder(s). boom point: the outward end of the load-bearing boom. boom stop: a device or structure designed to limit boom travel to its highest allowable position. brake: a device, other than a motor, used for retarding or stopping motion by friction or power means. braking means: a method or device for retarding or stop- ping motion. buffer/bumper: an energy-absorbing device for reducing impact when a moving boom or crane reaches the end of its permitted travel. cab: a housing provided for the operator and containing the crane controls. clutch: a means for engagement or disengagement of power. counterweight: weight used to supplement the weight of the machine in providing stability for lifting working loads; it swings with the crane. crane, standby: crane that is not in regular service but used occasionally or intermittently as required. designated person: a person selected or assigned by the employerorthe employer’s representative asbeingcom- petent to perform specific duties. drum: the cylindrical member around which a rope is wound and through which power is transmitted to the ropes.dynamic loading: loads introduced into the machine or its components by forces in motion. flange point: the point of contact between the rope and drum flange where the rope changes layers on a rope drum. gage, track: the horizontal distance between the center lines of the tow rails measured perpendicular to the direction of travel. gantry: a movable structural frame consisting ofcolumns and bracing capable ofsupporting a crane with its work- ing and dynamic loads. high-strength (traction) bolts: high-strength tensile bolts used in the assembly of crane components. The bolts are installed in tension, by torquing or other means, at a level greaterthanthatproduced byin-orout-of-service loads for the purpose of reducing the likelihood of bolt fatigue failure.