ASME B30.3:2016 pdf download

ASME B30.3:2016 pdf download.Tower Cranes
Within the general scope of the B30 Standard, as defined in Section I of the B30 Standard Introduction, the B30.3 Volume applies to “construction tower cranes” and “permanently mounted tower cranes” that are pow- ered by electric motors or internal combustion engines and that adjust their operating radius by means of a luffing boom mechanism, a trolley traversing a hori- zontal jib, or a combination of the two. The cranes may be mounted on “fixed bases” or “traveling bases” and may have tower and supporting structure arrangements that permit the crane to climb in a structure being built or that permits increasing the crane’s tower height as the structure rises. Variations ofthe above physical char- acteristics that provide the same fundamental operating characteristics are included in the scope of this Volume; however, the requirements ofthis Volume are only appli- cable to the cranes within this scope when they are usedinliftingoperations. Mobile cranes configuredwith tower attachments (refer to ASME B30.5) and self-erecting tower cranes (refer to ASME B30.29) are not within the scope of this Volume.
3-0.2.1.1 By Type of Application construction tower
crane: a hammerhead, luffing, or other type of tower crane that is regularly assembled and disassembled for use atvarious sites. Itis usually charac- terized by provisions to facilitate erection and disman- tling and may include features to permit climbing or telescoping. permanently mounted tower crane: a hammerhead, luffing, or other type of tower crane that is erected for longer termuseatone location(5 yr ormore). The configuration of the crane usually remains unchanged during the entire installation period.
3-0.2.1.2 By Method of Load Positioning
hammerhead tower crane: a tower crane with a horizontal jib and a load trolley that traverses the jib to change load radius (see Figs. 3-0.2.1.2-1 and 3-0.2.1.2-2).luffing boom tower crane: a crane with a boom pinned to the superstructure at its inner end and containing load hoisting tackle at its outer end, and with a hoist mecha- nism to raise or lower the boom in a vertical plane to change load radius (see Fig. 3-0.2.1.2-3).
3-0.2.1.3 By Support
Arrangement braced or guyed tower crane: a tower crane with tie-ins or guys attached to the tower to permit the crane to be erected or climbed to greater than the maximum free- standing height (see Figs. 3-0.2.1.2-2 and 3-0.2.1.3-1). freestanding tower crane: a tower crane that is supported on a foundation or structural support without assistance from braces, guys, or other means (see Figs. 3-0.2.1.2-1 and 3-0.2.1.2-3). internal climbing tower crane: a tower crane arranged to raise itself from floor to floor in a building as construc- tion advances (see Fig. 3-0.2.1.3-2).
3-0.2.1.4 By Ability to Travel fixed-base tower
crane: a freestanding, braced, guyed, or ballasted platform tower crane that is mounted on a foundation or structural support and does not travel (see Figs. 3-0.2.1.2-1 and 3-0.2.1.2-3). travelingtowercrane: afreestandingtowercrane mounted on a ballasted platform furnished with bogies that ride along rails (see Fig. 3-0.2.1.4-1).
3-0.2.2 General
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 applicable governmental jurisdiction. axis of rotation: the vertical line about which a crane swings. balance: the condition of the superstructure of a tower crane necessary for climbing; the load or the luffing boom is positioned at that radius which causes the verti- calmomentofthe superstructure aboutthe balance point to go to zero.
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.