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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When the temperature of the component is beyond these limits, special additional design considerations may be required.
All other mechanical components shall be designed to the requirements of this chapter. Please copy and paste this embed script to where you want to embed Embed Script. For example, a clamping device will not be able to maintain its grip if the members of the device flex excessively under load. Some lifter applications may result in greater dynamic loading that will bfh-1-2014 higher design factors. Although guards and personnel protective equipment are safety equipment, they were incorporated into this design standard.
ASME-BTH – Free Download PDF
Stress Category Crack initiating from weld as,e Crack initiating from weld root: Controls mounted on the lifting device shall be located, guarded, and designed for the environment and impacts expected. Particular care needs to be taken when evaluating the lubrication method since some types of self-lubricating bearings cannot withstand severe loading environments.
The Wire Rope Users Manual, 3rd edition, Table 12 provides information on sizing the wire rope groove with respect to the wire rope to allow for a proper seating surface. However, members of the construction community expressed the need for design criteria more suitable to their operating conditions, including a lower design factor, and the necessity to address other failure modes such as fracture, shear and buckling, and design topics such as impact and fasteners.
Minimum Sizes of Fillet Welds. Allowable Stress Ranges, ksi MPa.
The stress increase due to member curvature need not be considered for flexural members that can develop the full plastic moment when evaluating asmme strength. The effective width limit of the tensile stress area defined by eq. Along with these technical changes, the nonmandatory Commentary for each chapter was moved to its own respective Nonmandatory Appendix. When designing a pin for a connection in which doubler plates are used to reinforce the pinhole region, the assumption of loading to the pin shall be consistent with the assumption of how the load is shared among the main center plate and the doubler plates.
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.
This issue is discussed further in paras. Typical characteristics of the application for this Design Category include rough usage and lifts in adverse, less controlled conditions. This Standard does not attempt to address the many variances with respect to evaluating the strength of the connected pieces C Bolted connections subjected to cyclic shear loading shall be designed as slip-critical connections unless the shear load is transferred between the connected parts by means of dowels, keys, or other close-fit elements.
Rebbin, Bradley Lifting Corp.
For rolled shapes, this value may be taken as the clear distance between flanges less the fillet or corner radius. These design considerations must adme evaluated and accounted for by the lifting device manufacturer or qualified person.
Therefore, asmd design of lifting devices made in accordance with this Standard will not normally require the use of an impact factor. Cite the applicable edition of the Standard for which the interpretation is being requested. The Committee recognizes that in some special low headroom applications the sheave size may need to be smaller to accommodate the limited space available. The inclusion of lateral forces in this paragraph is intended to bth-1-0214 to calculated lateral forces that occur as a result of the intended or expected use of the lifter.
This chapter sets forth selection criteria for electrical components of a below-the-hook lifting device. UPC p A Vp Fasteners for covers, panels, brackets, or other noncritical components shall be selected zsme the lifting device manufacturer or a qualified person to meet the needs of the application.
In the absence of similar research results using other types and grades of bolts, para.
For purposes of this section, fillet or groove welds loaded parallel to the axis of the weld shall be designed for shear forces. A pinconnected plate may fail in the region asmf the pinhole in any of four modes. Control panels shall be enclosed and shall be suitable for the environment and type of controls.
The value B is positive when the stem is in tension and negative when the stem is in compression anywhere along the unbraced length.