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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Tests on overhead cranes Madsen, showed somewhat less severe dynamic loading.
In the absence of similar research results using other types and grades of bolts, para. For an I-shape member for which the unbraced length of the compression flange falls into the range defined by eq. Mechanical components of the lifting device that are stressed by the force s created during the bth–12014 or movement of the load shall be sized in accordance with para. Some symbols may have different definitions within this Standard.
Bth1–2014 is not intended that highly localized peak stresses that may be determined by computeraided methods of analysis and that may be blunted by confined yielding must be less than the specified allowable stresses. As an alternative to the Lewis formula in eq.
All motion hazard guards shall a prevent entry of hands, fingers, or other parts of the body into a point of hazard by reaching through, over, under, or around the guard b not create additional motion hazards between the guard and amse moving part c utilize fasteners not readily removable by people other than authorized persons d not cause any additional hazards, if openings are provided for lubrication, adjustment, or inspection e reduce the likelihood of personal injury due to bh-1-2014 of component parts f be designed to hold the weight of a lb kg person without permanent deformation, if used as a step Wire rope shall be of a recommended construction for lifting service.
ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. C-1 to be established asms the reliability index.
This Standard provides minimum structural and mechanical design and electrical component selection criteria bth-1-20144 ASME B Thank you for interesting in our services. A second dynamic load spectrum was developed for a special case of Design Category A. Cite the applicable edition of the Standard for which the interpretation is being requested. Boyd, The Boeing Bbth-1-2014. Experience has shown that members of below-thehook lifting devices are not generally composed of slender shear elements.
If magnetic contactors are included within the static assembly, they shall be rated in accordance with para. Welding of lifters fabricated from metals other than steel shall be performed in accordance with a suitable welding specification as determined by a qualified person, provided the quality and inspection requirements are equal to or greater than those required by this Standard.
An in-depth discussion of axial—bending interaction and the derivation of these formulas may be found in Galambos Fatigue stress on a shaft element shall not exceed the following values: Portable means for adding a lock to the switch or circuit breaker shall not be permitted.
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. Tension stress is considered to have the opposite algebraic sign from compression stress para.
The system shall be designed to asmw against pressures exceeding the rating of the system or any component. The slenderness ratio equal to Cc defines the border between elastic and inelastic buckling. Plug and slot welds may be used to transmit shear in lap joints or to prevent buckling of lapped parts and to join component parts of built up members.
Compact and noncompact sections are defined by the width—thickness ratios of their compression elements. Equation applies to cylindrical members. Based on a review of a large number of gear designs, the Lewis Equation coupled with the design factor, Nd, provides conservative results.
ASME-BTH – Free Download PDF
Factors such as type and condition of gripping surfaces, environmental conditions, coefficients of friction, dynamic loads, and product temperature can affect the required support force and shall be considered during the design by a qualified person. Stress range on tensile stress area due to live load plus prying action when applicable.
The effective throat does not need to exceed the thickness of the thinner part joined. This Design Category should not be used in any environment where severe conditions or use are present. Suspended beams exhibit different behavior with respect to lateral torsional buckling Dux and Kitipornchai, The Committee believes these issues need to be addressed in the design phase to ensure that inspection and maintenance can be adequately performed while assuring that operator safety is maintained.
This chapter sets forth design criteria for prismatic structural members and connections of a below-thehook lifting device.