ASME B30-29-2018 pdf download
ASME B30-29-2018 pdf download.Self-Erecting Tower Cranes.
SECTION 29-0.1: SCOPE OF B30.29 Volume B30.29 includes provisions that apply to the construction, operation, inspection, testing, and mainte- nance of powered self-erecting tower cranes that adjust operating radius by means of a trolley traversing a jib. These may be horizontal, elevated, articulating, or telescoping, and used for vertical lifting and lowering of freely suspended, unguided loads that consist of equip- ment and materials. Self-erecting tower cranes have vertical or nearly vertical masts that are bottom slewing and mounted on fixed, traveling, or mobile bases. The cranes are capable of moving or being moved from job site to job site fully assembled or nearly fully assembled. This Volume does not apply to cranes used for nonver- tical lifting service or lifting a guided load, or to truck- mounted material delivery cranes with a tubular boom and trolley traversing the boom. Tower cranes (refer to ASME B30.3) and mobile crane tower attachments (refer to ASME B30.5) are not within the scope of this Volume. SECTION 29-0.2: DEFINITIONS 29-0.2.1 Types of Self-Erecting Tower Cranes See Figures 29-0.2.1-1 and 29-0.2.1-2. ð18Þ 29-0.2.2 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. axis of rotation: the vertical line about which a crane swings. axle: the shaft or spindle with which or about which a wheel rotates. On wheel-mounted cranes, it refers to a type ofaxle assembly including housings, gearing, differ- ential, bearings, and mounting appurtenances. balanced: the condition of the superstructure of a self- erecting crane necessary for telescoping the mast; the load is positioned at that radius that causes the vertical moment ofthe superstructure about the balance point to go to zero. ballast: weights added to the fixed frame to create addi- tional stability or to counter the effects of the lifted load. bogie: the assembly that includes a pivot, frame, axle(s), and wheel(s) on which a crane rides on rails, and includes an assemblyoftwo or more axles arranged to permitboth vertical wheel displacement and an equalization of loading on the wheels. 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. controlstation: the location ofthe crane function controls, either cab-mounted or by remote control. counterweight: weights added to the rotating frame to create additional stability or to counter the effects of the lifted load. crane: in this Volume, the use ofthe word “crane” refers to self-erecting cranes, which are lifting machines, mounted on a base, with a superstructure consisting of a mast, rotating frame, and a jib. crossoverpoints: points ofrope contactwhere one layerof rope on a rope drum crosses over the previous layer. directsupervision: a designated operatorin the immediate area of the trainee, within visual sighting distance, and able to effectively communicate with the trainee. The designatedoperatorshallhavenodutiesotherthanobser- ving the operation of the crane by the trainee. dismantle: to fold/retract and disassemble crane for removal or relocation. dog everything: apply or engage all brakes, locks, and pawls. drum: the cylindrical member around which rope is wound; used for multiple functions on the crane.
pitch diameter: the diameter of a sheave or rope drum measured at the centerline of the lowest layer of rope. qualified operator: an operator who has met the require- ments of paras. 29-3.1.2(a) through 29-3.1.2(c). qualified person: a person who, by possession of a recog- nizeddegreeinanapplicablefieldoracertificateofprofes- sional standing, or by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work. radius(load): the horizontal distance from the crane’s axis ofrotation to the center ofthe vertical hoist line or tackle with load applied. rail clamp: a device for fastening a traveling crane to its rails to limit wind-induced travel. rated capacity (load) limiter: a device that automatically monitors radius, load weight, and load rating, and prevents movements of the crane that would result in an overload condition. rated load (load rating): the maximum allowable load at each lifting radius, designated by the manufacturer; rated loads are expressed in pounds, kilograms, short tons, or metric tons. reconfigure: to change the mast height, jib length, or jib angle. remote control: a radio or cable control device used to activate the crane control functions.
