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 following characteristics shall be determined for each type of fluctuating stress e. PDF files will be “bound” to the computer on which it was first opened.
Further factors relating to specific mechanisms of a be are discussed in B. The content has also been generally confined to the permissible stress and design rule aspects, since any attempt to provide design guidance beyond this level would involve a very extensive practical design manual, which is not the intent of the standard.
Permissible stress, P cfor mechanism components Type of stress Case of loading see 5. The use of wheels of greater diameter is not recommended. Derating of hooks 20 4.
You may find similar items within these categories by selecting from the 2573-22 below:. No part of this publication may be reproduced in any form without the prior permission in writing of BSI.
Classes of utilization of mechanisms Class of utilization Service life hours Remarks T1 Irregular use. References The titles of the standards publications referred to in this standard are listed on the inside back cover.
Where the individual design standard or code requires the static strength of the gearing to be checked in addition to the strength during the operational cycle, case 3 loading conditions specified in 5. It also provides a framework of reference between 2753-2 purchaser and the manufacturer. More specific requirements may be laid down in standards relating to the individual types of crane as in the case of BS 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 253-2 life 2537-2 by the procedure outlined in the previous paragraph.
Hours per day for gear design 20 8. Permissible stress, P cfor mechanism mechanisms 3 components 5 5.
Specifies classification of mechanisms for all types of cranes based on severity of intended use, loads and load combinations, calculation of stresses, stresses in components and the bss and verification of proprietary items.
Derating of hooks Table showing sizes of point hooks as listed in table 2 of BS Non-proprietary mechanism components shall be proportioned by checking that they have adequate safety against becoming unserviceable as a result of a single combination of loads causing fracture, bending, or other type of failure.
The resulting localization of high stresses is known as the stress concentration or 257-2 effect and is measured 22573-2 the stress concentration factor. The design loading used for gearing calculations shall be determined from the case 1 load combinations in clause 5, having regard to the prime mover, brake and transmission characteristics for the specific case.
Amendment dated July – Indicated by a sideline in the margin. Any person who, when making use of 2573-22 British Standard, encounters an inaccuracy or ambiguity, is requested to notify BSI without delay in order that the matter may be investigated and appropriate action taken.
They shall also, when appropriate, be checked against fatigue.
Full text of “Safety British Standards”
In the case of proprietary slewing rings, it is particularly important that the manufacturer is consulted and given full details of the loads and duty involved. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols and size, type or grade designations. Nevertheless, it has been the general experience of users, manufacturers and the safety authorities that, where design was found to contribute to an accident, it was nearly always caused by bad detail design or failure to appreciate the loadings involved rather than the selection of too high a permissible stress.
General principles and requirements. For a given load, wheels of this type have a much longer useful life than wheels of lesser surface hardness, which makes their use worthwhile in the case of appliances performing intensive duty. Verification of ns 4 8. G is a mechanism duty factor taken from table 5 according to the group classification of the mechanism see clause 3. In some cases, economic considerations 5273-2 technical limitations dictate that a component should be designed or selected for a shorter life than the remainder of the mechanism, so that renewal of the component will be necessary during the life of the mechanism: The minimum breaking load of a rope intended for a particular duty shall be determined from: Again there may be more recent versions of the document.