Classification (Columns: EC3 Eurocode)
The classification of the cross section is in accordance with Table 5.2. General columns can be classified as:
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Plastic Class = 1
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Compact Class = 2
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Semi-compact Class = 3
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Slender Class = 4
Class 4 sections are not allowed.
Implementation of the below clauses is as follows:
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Classification is determined using 5.5.2 (6) and not 5.5.2 (7).
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5.5.2 (9) is not implemented as clause (10) asks for the full classification to be used for buckling resistance.
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5.5.2 (11) is not implemented.
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5.5.2 (12) is not implemented. A brief study of UK rolled UBs and UCs showed that flange induced buckling in normal rolled sections is not a concern.