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ASME B30.3-2004 pdf download

ASME B30.3-2004 pdf download.Construction Tower Cranes.
SECTION 3-0.1: SCOPE OF B30.3 Within the general scope as defined in Section I, B30.3 applies to constructiontowercranes, powered byelectric motors or internal combustion engines, and any varia- tions thereof which retain the same fundamental charac- teristics. The scope includes cranes of the above type that adjust operating radius by means of a boom luffing mechanism, or by means of a trolley traversing a hori- zontal boom, or by means of a combination of the two. Construction tower cranes may be mounted on fixed or traveling bases. Additional mounting means may include arrangements that permit the crane to climb in the structure being built, or that permit increasing the tower height as the structure rises and utilizing braces attached to the host structure as needed. The requirements ofthis volume are applicable only to cranes when used in lifting work. Permanently mounted tower cranes (refer to ASME B30.4) and mobile crane tower attachments (refer to ASME B30.5) are not within the scope of this volume. SECTION 3-0.2: DEFINITIONS 3-0.2.1 Types of Cranes (a) By Type ofApplication 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 term use atone location, (five years or more). The config- uration of the crane usually remains unchanged during the entire installation period. Permanently mounted tower cranes are covered under ASME B30.4. (b) By Type of Boom hammerhead tower crane: a tower crane with a horizontal boom and a load trolley that traverses the boom to change load radius (see Figs. 1 and 5). 1 luffing 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 Figs. 2 and 6). (c) By Support Arrangement braced or guyed tower crane: a tower crane with braces or guys attached to the tower (mast) to permit the crane to be erected to greater than the maximum free-standing height (see Figs. 5 and 6). free-standing tower crane: a tower crane that is supported on a foundation or structural frame without assistance from braces, guys, or other means (see Figs. 1 and 2). internal climbing tower crane: a tower crane arranged to raise itself from floor to floor in a building as construc- tion advances (see Fig. 7). (d) By Ability to Travel fixed-base tower crane: a free-standing, braced, or guyed tower crane that is mounted on a foundation or struc- tural frame and does not travel (see Figs. 1 and 2). traveling tower crane: a free-standing tower crane mounted on a ballasted platform furnished with trucks that ride along rails (see Fig. 3). 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 governmental jurisdiction. appointed: assigned specific responsibilities by the employer or the employer’s representative. authorized: approved as satisfactorybya dulyconstituted administrative or regulatory authority. axis of rotation: the vertical line about which a crane swings.
ballast: weight added to a crane base to create additional stability; it does not rotate when the crane swings. Also used to refer to materials placed under rails, such as crushed stone, to support the rail ties or sleepers, to provide drainage, and to distribute the applied loads. base, anchor bolt: a crane base that is bolted to a footing [see Fig. 4(a)]. base, expendable: for static-mounted cranes, a style of bottom mast 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. 4(b)]. base, knee brace: a crane base that uses diagonal members to spread the loading [see Fig. 4(c)]. base, tower crane: a mounting accessory to secure the bottom of the tower (mast) to a foundation, structural frame, or travel base. 2 base, travel: a crane base that is a ballasted platform mounted on trucks that ride along rails (see Fig. 3). 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 (jib): on hammerhead tower cranes, the horizontal structural member attached to the rotating superstruc- ture of a crane on which the load trolley travels when changingloadradius; onluffingand other typesoftower crane, a member hinged to the rotating superstructure and used for supporting the hoisting tackle. 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 free-standing height (see Fig. 6).

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