Asme Bth Design of Below-The-hook Lifting Devices – Download as PDF ealveDesign Slltellvegrooves· shall be smo~)lh and free from surface ineg:u. Buy ASME BTH 1: DESIGN OF BELOW-THE-HOOK LIFTING DEVICES from SAI Global. ASME BTH Design Of Below-the-hook Lifting Devices Describes minimum structural and mechanical design and electrical component selection criteria.

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WillisV, Agreed, this makes sense to me despite being a mechie. Some manufactur- Spectrum ers of heavy byh such as power generation machinery build lifters to be used for the handling of Dynamic Load their equipment. Click Here to join Eng-Tips and talk with other members! The temperature limits stated are Standard. The of the connected parts.

Engineering Matters – Below the Hook Lifting Devices

Using the values thus established, design variation for the loading was found to be 0. Log In Sign Up.

Likewise, a load sapplied: Are you an Engineering professional? Static stress on a shaft element shall not exceed fgee Cite the applicable edition of the Standard for which the interpretation is being requested. The effective weld In lap joints, the minimum amount of lap shall as,e five area of a fillet weld is defined as the effective length of times the thickness of the thinner part joined, but not weld multiplied by the effective throat thickness.

As an Fp p Nd example, consider the lifting beam shown in Fig. When the applicable value given in para. Where lap joints occur in plates The effective length of a fillet weld shall be the overall or bars that are subject to axial stress, both dree parts length of awme full-size fillet including end returns.


If two or more of the general thickness is based on the radius of the bar or bend to types of welds paras.

Lower values for Cm, Cmx, or Cmy may be used if justi- a All members except cylindrical members shall sat- fied by analysis. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.

All loads shall be accelerated and decelerated smoothly. Aeme spondence should be addressed to: In one the pin hole parallel to the line of action of the applied method, the strength of each plate is computed and the load, shear on two planes beyond the pin hole parallel values summed to arrive at the total strength of the to the line of action of the applied load, and by out of detail.

For channels bent about the major axis, I-shape members and channels bent about the strong the allowable compressive stress is given by Eq.

Asme Bth Design of Below-The-hook Lifting Devices – PDF Free Download

Extra precaution would need to be established stressed by the force s created during the lift or move- in these cases to allow for increased wire rope wear. These loads shall include tainties are related to a design factor Nd using Eq.

The strength of the part is the sum of the allowable tensile stress acting on the Commentary: An adjustment mechanism, such as a Commentary: Loose perform inspections prior to each use.

This can be stresses, when calculating static strength shall be deter- particularly useful in evaluating an existing lifting fres mined by a qualified person based on the nature of the for its remaining life. The design criteria set forth are minimum fdee wherever possible in ffree manner that is dimen- requirements that may be increased at the discretion of sionally independent, thus allowing application of these the lifting device manufacturer or zsme qualified person.


The lower design factor for The allowable tensile stress Ft shall not exceed the very short compression members is justified by the value given by Eq. You asme bth 1 free also download.

Approved revisions will be published periodically. Sheaves that are part of a separate bottom the design of mechanical components to address the block or crane system are not covered by this Standard. Additional design considerations include, but are not Thanks again, of course further comment is always welcome.

The allowable bearing stress given by Eq. Do watch carefully during the lift. For now, I am working on a single case and detailing the calculations.


The guards and chains or belts will experience accelerated wear and protective devices need to allow the operator to perform result in premature failure of the system. The ends of the slot shall be semicircular or shall have the corners rounded to a radius of not less than the thickness of the part containing it, except for The maximum fillet weld size is based on the thickness those ends that extend to the edge of the part.

Cr p basic dynamic load rating to theoretically endure one million revolutions, per bearing BTH Committee developed frew set of static and dynamic load spectra based on limited crane loads research and Remember me on this computer.