ASME-BTH June 5, | Author: Nanang Komarudin | Category: Strength Of Materials, Engineering, Mechanical Engineering, Science, Nature. Buy ASME BTH 1: DESIGN OF BELOW-THE-HOOK LIFTING DEVICES from SAI Global. ASME BTH Design Of Below-The-Hook Lifting Devices. Be notified when this Standard is updated or amended – Add to StandardsWatch. General.
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Jankowski, Walker Magnetics T. Peak stresses due to discontinuities do not affect the ultimate strength of a structural element unless the asm is brittle. A compact section is capable of developing a fully plastic stress distribution before the onset of local buckling in one or more of its compression elements.
ASME-BTH – Free Download PDF
Means for discharging the inductive energy of the magnet shall be provided. C-4 as well as additional details, such as pinned connections, that are of value in lifter design. The paragraph given after the definition of a term refers to the bthh-1-2014 where the term is first used. C-1 Cornell, ; Shigley and Mischke, If the exposure is prolonged and cyclic in nature, the creep rupture strength of the material, which is lower than the simple elevated temperature value, must be used in determining the design rated load and life of the device.
ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals. These references are cited for information only.
The critical stress in this region is due to the combination of these shear and tensile stresses. The Committee selected the upper temperature limit as a reasonable maximum temperature of operation in a summer desert environment. When reinforcement is not removed: Special wiring, shielding, filters, and grounding may need to be considered to account for the effects of electromagnetic interference EMIradio frequency interference RFIand other forms of emissions.
Typically, documents that require the indicated markings may include top level drawings, quotations, calculations, and manuals.
Therefore, the design of lifting devices made in accordance with this Standard will not normally require the use of an impact factor. The allowable bearing stress defined by eq.
Intermittent groove welds are not permitted. The inquirer may also include any plans or drawings that are necessary to explain the question; however, they should not contain proprietary names or information.
The maximum spacing of intermittent fillet welds is 12 in.
Compliance with requirements and criteria that may be unique to specialized industries and environments is outside the scope of this Standard. The basic dynamic load rating Cr for a bearing with L 10 bearing life from Table Paragraphs in this Appendix correspond with paragraphs in Chapter 1. The selection of a Design Category asm Service Class allows the strength and useful life of the lifter to be matched to the needs of the user.
The strength factors above are used in formulas containing diametral pitch. For circular tubes with compact walls as defined by Table The shape factors for these shapes are typically 1. The higher design factor for more slender members provides added protection bth-1-2104 the effect of such bending stresses.
Interpretations can only be rendered in response to a written request sent to the Secretary of the BTH Standards Committee at go.
The minimum center-to-center spacing in a longitudinal direction on any line shall be two times the length of the slot. For example, a clamping device will not be able to maintain its grip if the members of the device flex excessively under load. The analysis techniques and models used by the qualified person shall accurately represent the loads, material properties, and device geometry; stress values resulting from the analysis shall be of suitable form to permit correlation with the allowable stresses defined in this Standard.
Superintendent of Documents, U. Acceptable installation methods include, but are not limited to, turn-of-the-nut method, torque wrenches, and electronic sensors. ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. Wire rope clips attached with U-bolts shall have the U-bolt over the dead end of the wire rope and live rope resting in the clip saddle.
If the edge of the plate is curved, as illustrated in Fig. As with straight beam bending theory, the derivation of the equations by which the bending stresses of a curved beam may be computed are based on the fundamental asem that plane sections remain plane Young and Budynas, Scope, Definitions, and References. The effective throat does not need to exceed the thickness of the thinner part joined.
Tension stress is considered to have the opposite algebraic sign from compression stress para. An in-depth discussion of axial—bending interaction and the derivation of these formulas may be found in Galambos All other mechanical components shall be designed to the requirements of this chapter. SRref p reference stress range to which Neq relates. Crack initiating bthh-1-2014 weld root: Load Cycles 0 1 2 3 4 0—20, 20,—, ,—, ,—2, Over 2, The minimum center-to-center spacing of plug welds shall be four times the diameter of the hole.