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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Case 1 loading conditions specified in 5. Physical phenomena Testing Analytical chemistry, see The following characteristics shall be determined for each type of fluctuating stress e. R 6 Loads sb from frictional forces. Assessment of torque loading of crane Specification mechanisms 16 1.
The selection of steel wire ropes as specified in 8.
It is an important responsibility of the 273-2 and manufacturer to ensure that torque values are correctly and appropriately quantified 2573- that mechanism will perform as required in the service environment for the intended life. 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.
Rail wheels shall be checked under the loading conditions specified in 5. You will be required to download the free plug-in to view any secured PDF document.
Full text of “Safety British Standards”
The general method outlined in this clause does not purport to be the only method, and more accurate predictions of fatigue life can be attained by using other appropriate methods in particular circumstances.
Where a static rope is not clearly associated with a particular mechanism, the minimum coefficient of utilization, Z pshall be taken as that corresponding to the hoist mechanism of the appliance.
The service life for which a mechanism or component is designed is a figure used only as a design parameter and shall not be taken as implying a guaranteed life.
The value of Ci is given in accord- ance with the nature of the stress cycles as follows: R 3 Loads due to the weight of the hook load. A specific case is buffer load ft, which is 22573-2 by 5.
Part 2 ; Foreword The preparation of a British Standard dealing with design stress levels in the mechanisms of cranes was begun in response to demand from 25573-2 user industries and particularly the public sector. For purpose-built cranes, the selection of an appropriate nominal state of loading for each mechanism may be agreed between the purchaser and manufacturer.
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. Attention is drawn to the existence in the UK and elsewhere of regulations concerning factors of safety for crane ropes which may override the requirements of this standard.
The size factor is derived from figure 2. Where other steels are used, the crane manufacturer shall show that the properties are comparable with the standard steels and that they have been subjected to equivalent tests. The most reliable basis for porportioning gearing of a crane motion is service experience under hs corresponding to the classification parameters involved.
When a hoisting appliance is to be used for dangerous handling operations e. Because cranes lift and transport heavy loads, there is a major safety aspect in their design which has, to some 2753-2, to be related to the level of design stresses permitted.
In addition, the requirements for stiffness lateral and torsionalfatigue, influence of bearings, fits of components, etc. Weapons Domestic and commercial equipment. Mechanisms and components shall be designed or selected for a particular intended service life and one of the nominal values specified in table 1 shall bss used.
Standard Number BS Free to use BIM project management tool provides step-by-step help to define, manage and validate responsibility for information development and delivery at each stage of the asset life cycle in bbs 2 BIM projects. Similar effects may occur during braking or collision. In addition to the preparation and promulgation of standards, BSI offers specialist services including the provision of information through the BSI Library and Standardline Database; Technical Help to 5273-2 and other services.
The hours per day to be used for gear design purposes is derived from the class of utilization for the particular mechanism.
Capacities are rounded off in line with R10 series. Attention shall be given to the method of mounting and the bolting requirements for which the manufacturer’s recommendations shall sb taken into account. In the absence of such information regarding the duty of the appliance, ah assumed daily utilization time shall be used.
Bolts other than friction grip bolts shall comply with the requirements of BSbut this does not preclude the use of specialized fasteners where appropriate, in accordance with the manufacturer’s recommendations.
This security feature prevents the reproduction and redistribution of downloaded documents. Want access to British Standards? Rules for the design of cranes. 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.
Classification of mechanisms 2 4.