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Figure 6 — Two-parameter representation of stress cycles 20 Licensed Copy: Stress histories characterised by the same value of s may be assumed to be equivalent in respect to the damage in similar materials, details or components.
Moveable cabins EN These static equivalent loads are considered as deterministic actions, which have been adjusted in such a way that they represent load actions during the eh of the crane from the actions or circumstances under consideration. When agreed upon Fj shall also be multiplied by an appropriate risk coefficient y n.
When provisions of this type C standard are different from those, which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built according 1301-1 the provisions of this type C standard.
General purpose wn cranes EN The fatigue assessment of the combined effect of bbs histories – interaction – is based on the action of the independent ones. The relationship between stress amplitudes to failure by fatigue and mean stress or stress ratio for the component under consideration for fatigue assessment is shown in Figure 7. This standard also establishes interfaces between the user purchaser and the designer, as well as between the designer and the component manufacturer, in order to form a basis for selecting cranes and components.
Compliance with a British Standard does not of itself confer immunity from legal obligations. All supports, where given limits are exceeded, i. Static equivalent loads are given in EN If there are significant differences in the enn with different load levels, e.
Allgemeine Conception generale – Partie 1: Hazards can occur if extreme values of load effects or their histories exceed the corresponding limit states.
BS EN 13001-1:2015
To prevent these hazards with a margin of safety, it shall be shown that the calculated extreme values of load effects from all loads acting simultaneously on a 1300-1 and multiplied with an adequate partial safety coefficient, as well as the estimated histories of load effects, do not exceed their corresponding limit states at any critical point of the crane. General Principles and requirements Part 2: Alternatively, advanced and recognised theoretical or 1300-1 methods may be used in general, provided that they conform to the principles of this standard.
Free to bz 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 level gs BIM projects. For the proof of rigid body stability it shall be shown that under the combined action of the loads multiplied by their partial safety factors no rigid body movement occurs. For all crane systems, the limit state method is applicable without any restriction.
Electrotechnical equipment prEN Technical principles and specifications ISO For the proof of fatigue strength of components the stress histories acting on them may also be directly specified, considering the service conditions, by selecting a class S according to Table 6. Contact the Information Centre.
Full text of “Safety British Standards”
For cranes or crane configurations where all the loads from different drives acting simultaneously do not affect each other because they are acting at right angles to each other i. Therefore it is necessary to transform the two-parameter frequencies of stress cycles into one- parameter frequencies for constant mean stress or constant stress ratio.
Figure 5 — Example for class P 4. Table 4 shows the classes Q of load spectrum factors kQ. General principles and requirements AMD The total number of such operations during the useful life shall be specified. The 13001-11 conditions are determined by the following parameters: A list of organizations represented on this subcommittee can be obtained on request to its secretary. The number of stress cycles of class ij frequency is n,j. For the proof of fatigue strength, loads are multiplied by the dynamic factor in accordance with EN eb -2, whilst all partial safety factors y P are set to 1.
Figure 2 — Typical flow chart of the limit state method 4. When establishing the load combinations, consideration shall be given to the use of the crane, taking into account its control systems, its normative instructions for use, and any other inherent conditions, where they relate to the specific aim of the proof of competence.
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For this purpose the limit state method, and where applicable the allowable stress method, is used in accordance with international and European design codes. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance hs the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations.
When the classified ranges of bss are used, the design shall be based on the maximum values of the parameters within the specified classes.
BS EN – Cranes. General design. General principles and requirements (British Standard)
For the proof of fatigue strength, the number and magnitude of significant stress cycles shall be specified. A task r can be characterised by a specific combination of crane configuration and sequence of intended movements.
A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
EN ISO 1 21 Figure 9 — One parameter representation of stress histories frequencies of stress amplitudes referred to constant stress ratio or constant mean stress 4. Frequencies of the amplitudes of normal stresses shall be determined for positive and negative mean stresses, the frequencies of the amplitudes of shear stresses need only to be determined for positive mean stresses. Power driven winches prEN