Figure 1.6: Axis convention
For profiled sheets and liner trays the following axis convention is used in this Part 1.3 of ENV 1993: y - y axis parallel to the plane of sheeting; z - z axis perpendicular to the plane of sheeting.
ENV 1993-1-3:1996 2 Basis of design 2.1 General
(1)P For the purpose of differentiating levels of reliability, a distinction may be made between three "construction classes" defined as follows:
- Construction Class I: Construction where cold formed thin gauge members and sheeting are designed to contribute to the overall strength and stability of a structure;
- Construction Class II: Construction where cold formed thin gauge members and sheeting are designed to contribute to the strength and stability of individual structural elements;
- Construction Class III: Construction where cold formed sheeting is used as an element that only transfers loads to the structure.
(2)P The methods for design by calculation and for design assisted by testing given in this Part 1.3 of ENV 1993 may be adopted for all construction classes.
(4)P The values of the partial factors given in this Part 1.3 of ENV 1993 shall be adopted for Construction Class I and Construction Class II.
(1)P The principles for ultimate limit states given in Sections 2 and 5 in Part 1.1 of ENV 1993 shall also be applied to cold formed thin gauge members and sheeting.
(2) The application rules for ultimate limit states given in Sections 2 and 4 of Part 1.1 of ENV 1993 should also be applied, except where different application rules are given in this Part 1.3.
(3)P For verifications by calculation at ultimate limit states the partial factor 7M shall be taken as follows:
- resistance of cross-sections where failure is caused by yielding:
- resistance of members and sheeting where failure is caused by buckling:
- resistance of net sections at bolt holes:
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