ASME B30.3-2009 pdf download.Tower Cranes Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings.
ballast: weight added to a crane base to create additional stability; it does not rotate when the crane swings. base, anchor bolt: a crane base that is bolted to a footing [see Fig. 3-0.2.2-1, illustration (a)]. base, expendable: for static-mounted cranes, a style of bottom tower section or member that is cast into a con- crete footing block; all or part of this component is lost to future installations [see Fig. 3-0.2.2-1, illustrations (a) and (b)]. base, fixed ballasted: a crane base that is a ballasted plat- form that does not travel. base, knee-braced: a crane base that uses diagonal mem- bers to spread the loading [see Fig. 3-0.2.2-1, illustration (c)]. base tower: a mounting accessory to secure the bottom of the tower to a foundation, structural support, travel, or ballasted base. base, traveling: a crane base that is a ballasted platform mounted on bogies that ride along rails (see Fig. 3-0.2.1.4-1). bogie: an assembly of two or more axles arranged to permit both vertical wheel displacement and an equal- ization of loading on the wheels. brace, tower: a structural attachment placed between a crane tower and an adjacent structure to pass loads to the adjacent structure and permit the crane to be erected to greater than freestanding height (see Fig. 3-0.2.1.3-1). 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: an energy-absorbing device for reducing impact when a moving crane or trolley reaches the end of its permitted travel. cab: a housing provided for the operator and containing the crane controls. climbing: for freestanding, braced, or guyed cranes, the process whereby the height of the tower is increased by adding sections at the top (see Fig. 3-0.2.1.3-1); for inter- nal climbing cranes, the process wherebythe entire crane is raised or lowered on or within a structure which is under construction (see Fig. 3-0.2.1.3-2). climbing cross-member: a structural member attached to the end of the hydraulic cylinder used to engage the climbing ladders or lugs via pawls to raise or lower the crane structure. climbing frame: for freestanding, braced, or guyed cranes, a structural frame supporting the superstructure which surrounds the tower and contains arrangements to raise the frame and superstructure of the crane for insertion of an additional tower section; for internal climbing cranes, a frame used to transmit operational and climb- ing reactions to the host building frame. climbing ladder: a steel member with crossbars (used in pairs) suspended from a climbing frame and used as jacking support points when some cranes climb. clutch: a means for engagement or disengagement of power. control station: the location of the crane function controls, either cab mounted or by remote control. counterjib: a horizontal member of a crane on which the counterweights and usually the hoisting machinery are mounted. counterweight: weights added to a crane superstructure to create additional stability or to counter the effects of the lifted load; they rotate with the crane as it swings. crane: in this Volume, the use of the word crane refers to tower cranes, which are lifting machines consisting ofa towerwitha superstructurethatrotates andincludes a load, luffing boom, or jib, and, on some cranes, a counterjib extending in the opposite direction to the load, luffing boom, or jib. crane, standby: a crane that is not in regular service but that is used occasionally or intermittently as required. crossover points: points of rope contact where one layer of rope on a rope drum crosses over the previous layer. documentation: The organized collection of information that describes the structure, design, purpose, operation, maintenance, and safety requirements for the crane and includes the stickers, placards, and labels that provide operational or safety-related information. drum: the cylindrical member around which rope is wound for lifting or lowering a load.