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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References The titles of the standards publications referred to in this standard are listed on the inside back cover. Loads shall be quantified by the designer having regard to 5273-2 part played by the mechanism in the service and environment for which the crane is designed. The use of wheels of greater diameter is not recommended.
For any component, the magnitude of the fatigue reference stress depends upon: Classes of utilization of mechanisms Class of utilization Service life hours Remarks T1 Irregular use.
It is an important responsibility of the designer and manufacturer to ensure that torque values are correctly and appropriately quantified so that mechanism will perform as required in the service environment for the intended life.
Once a PDF file has been bound to a computer, it can be opened only from that computer. Capacities are rounded off in line with RIO series.
The calculated stress, F cdetermined in accordance with 7. Alternatively the factor Cf r can be determined from the following formulae, in which N is the total number of cycles.
Where a component is subjected to axial tensile, axial compressive, bending or shear stress, F c shall be calculated in the normal manner. The factors that need to be considered when determining the required diameter for a particular rail wheel are: In some cases, for example, the torque required to accelerate or retard a motor armature or rotor complete with coupling, brake drum and pinion assembly may be proportionately high in relation to the torques required to perform the mechanism function.
Maximum torques in derricking and slewing mechanisms normally occur during conditions of braking, unless a high rate of acceleration is called for. Amendment dated July – Indicated by a sideline in the margin.
Failure of mechanism components represents a hazard of varying importance and can lead to consequential damage and cost which may be considerable. Document Status Indicators The Green document status indicator indicates that the document is: In computing the acceleration forces, R sit should be remembered that the accelerations achieved can be influenced by the presence of wind forces.
General principles and requirements. The following loadings shall be taken into account when designing a mechanism and its components. In addition, adequate allowances shall be made for the effective losses in section due to keyways, splines, etc.
Load actions incorporating corrigendum March Classification of mechanisms 4.
December Replaced By: 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. What are the securities? In practical terms this should ensure, for example, that the couplings, shafts, gears, bearings, etc.
For design purposes the following relations apply: The assessment of appropriate torque values for input to mechanism calculations 273-2 a clear understanding both of the characteristics of the prime mover 2573-22 of the way in which the mechanism will be required to perform in service.
Classification, caiculs des contraintes et conception des mecanismes — Specifications Regeln fur den Kranbau Teil 2. A specific case is buffer load ft, which is covered by 5.
Full text of “Safety British Standards”
In the process of selecting a rope the situation can arise where the minimum breaking load achieved exceeds the requirement and leads to a higher coefficient of utilization than the minimum value quoted in table 6. Accept and continue Learn more about the cookies we use and how to change your settings. B Loads due to collision with resilient buffers.
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.
Revision of British Standards. Coefficient, c 2for rail wheels 10 7.
Selection of components 8. Where appropriate, the term ‘bolt’ also applies to a setscrew or stud. Loadings to be considered in the design of 4. It should be noted that 22573-2 will not necessarily correspond to the combination of the maximum values of each of the individual loads. Jewellery Road vehicles engineering Railway engineering Shipbuilding and marine structures Aircraft and space vehicle engineering Materials handling equipment Packaging and distribution of goods Textile and leather technology Clothing industry Agriculture Food technology Chemical technology Mining and minerals Petroleum and related technologies Metallurgy Wood technology Glass and ceramics industries Rubber and plastic industries Paper technology Paint and colour industries Construction materials and building Civil engineering Military affairs.
Case 3 Crane out of service.