Welding Fabrication Standards - EWF
Welding Fabrication Standards - EWF
Welding Fabrication Standards - EWF
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<strong>Welding</strong> <strong>Fabrication</strong> <strong>Standards</strong> Page 75<br />
8.3 EN 1090 – 2: Technical requirements for the execution of steel<br />
structures<br />
This European Standard specifies general requirements for execution of structural steelwork.<br />
The pursued objective during the realization of a project of structure is to control risks connected to<br />
it by controlling possible execution defects. Nature and extend of risks being specific in every<br />
structure according to its purpose and complexity, execution classes are specified in this European<br />
Standard, to which correspond execution requirements with different severity levels.<br />
In accordance with EN 1990:2001, which defines consequence classes in its annex B for the<br />
purpose of reliability differentiation, three different consequence classes for structural elements are<br />
distributed in three levels noted as CC1, CC2 and CC3. The consequence classes of the elements<br />
of a structure may be indicated on the basis of indications given in table 17.<br />
Consequences<br />
Class<br />
CC3<br />
CC2<br />
CC1<br />
Description<br />
High consequence for loss of human life, or<br />
economic, social or environmental<br />
consequences very great<br />
Medium consequence for loss of human<br />
life, economic, social or environmental<br />
consequences considerable<br />
Low consequence for loss of human life,<br />
and economic, social or environmental<br />
consequences small or negligible<br />
Table 17 – Definition of consequences classes<br />
Examples of buildings and civil<br />
engineering works<br />
Grandstands, public buildings where<br />
consequences of failure are high (e.g. a concert<br />
hall)<br />
Residential and office buildings, public buildings<br />
where consequences of failure are medium (e.g.<br />
an office building)<br />
Agricultural buildings where people do not<br />
normally enter (e.g. storage buildings),<br />
greenhouses<br />
It should be noted that a same work, or part of it, can contain elements with different consequence<br />
classes.<br />
Moreover, in the definition of requirements for the product (and for the Manufacturer) also the use<br />
condition of the component shall be considered (execution and use); as a consequence the<br />
standard defines the execution categories, based on the table 18.<br />
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