Find the most up-to-date version of BS at Engineering BS Rules For The Design Of Cranes – Part 2: Specification For Classification, Stress Calculations And Design Of Mechanisms. Bs Crane Design – Download as PDF File .pdf), Text File .txt) or read online. Civil Engineering.
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The qualities of metal refer to cast, forged or rolled steels and spheroidal graphite cast iron.
Amendment C1 dated November – See foreword. Again there may be more recent versions of the document. December Replaced By: The Amber document status indicator indicates that some caution is needed when using this document – it is either: Search all products by. It applies to ropes complying with the requirements of ISO ; it does not exclude, however, ropes that are not specified in ISO Design and selection shall have regard to the potentially serious consequences of failure.
Derating of hooks table 1 of BS The combina- tions of loads to be considered for this case of loading will depend upon the type of crane, the application and the crane motion. Z p where F 0 is the minimum required breaking load in kN ; S’ is the maximum rope tension in kN as defined in 8.
Loads shall be quantified by the designer having regard to the part played by the mechanism in the service and environment for which the crane is designed. Derating of hooks Table showing sizes of point hooks as listed in table 2 of BS In addition, adequate allowances shall be made for the effective losses in section due to keyways, splines, etc. R 4 Loads due to the weight of the hook load augmented by the impact factor given in 5.
Due regard shall also be taken of other factors, such as deflection or overheating, which could interfere with the correct functioning of the mechanism.
Learn more about the cookies we use and how to change your settings. B Loads due to collision with resilient buffers.
In practical terms this hs ensure, for example, that the couplings, shafts, gears, bearings, etc. They shall also, when appropriate, be checked against fatigue. Components shall also be designed or selected to give an economic life in terms of durability that can be affected by fatigue, by wear, by temperature and by vibration.
Where cushioning devices are inserted in the drive, such as hydraulic couplings or electrical control features that limit the applied be, the benefit of these devices may be used in assessing the torques transmitted to the mechanism.
It takes account of the greater possibility in high speed mechanisms, and those in intensively used cranes handling loads near their maximum capacity, that combined stresses greater than those derived from calculation will occur.
No part of this publication may be reproduced in any form without the prior permission in writing of BSI. In cases where there is adequate service experience of similar or comparable components under known duty conditions, the checks shall be confined 25773-2 comparisons or extrapolations on a suitable basis.
Full text of “Safety British Standards”
This does not preclude the free 253-2, in the course of implementing the standard, of necessary details such as symbols and size, type or grade designations. Case 4 Exceptional loading conditions appropriate to the type of crane and its application that occur infrequently during its life e.
Where the bearing manufacturer’s selection procedure includes a method of determining an equivalent load for a spectrum of loading and this differs from the method described in clause 4, the bearing manufacturer’s method shall be followed. An outline procedure for fatigue verifications has been included, which defines recommended principles, but it is not possible, in the present state of the art, to include a comprehensive treatment, and reference to specialized text books may be necessary.
In assessing the individual loadings arising under case 1 and case 2 loading conditions, the hook load impact factor is not applied.
Selection of components 8. The surface finish factor is dependent on the ultimate tensile stress of the material and the machining process used in manufacture. For any component, the magnitude of the fatigue reference stress depends upon: The coefficient, c 2depends on the group classification of the mechanism and shall be as given in table Values of H for rope reeving components 8 6.
A specific case is buffer load ft, which is covered by 5. Table 6 gives the minimum coefficient of utilization, Z pfor each mechanism group.
Specification for classification, stress calculations and design of mechanisms Regies de conception des grues Partie 2. The class of utilization shall be selected according to the value of service life given in table 1 that is nearest to, but not less than, the assumed service life determined by the procedure outlined in the previous paragraph.
Where appropriate, the 2573-22 ‘bolt’ also applies to a setscrew or stud.