U

Actual cross-section Idealized cross-section

Figure 3.4: Approximate allowance for rounded corners

3.4 Geometrical proportions

(1)P The provisions for design by calculation given in this Part 1.3 of ENV 1993 shall not be applied to cross-sections outside the range of width-to-thickness ratios for which sufficient experience and verification by testing is available.

(2) The maximum width-to-thickness ratios bit and hit given in table 3.2 may be assumed to represent the field for which sufficient experience and verification by testing is already available.

(3) Cross-sections with larger width-to-thickness ratios may also be used, provided that their resistance at ultimate limit states and their behaviour at serviceability limit states are verified by testing in accordance with Section 9.

Table 3.2: Maximum width-to-thickness ratios

Element of cross-section

Maximum value

t

< b >i

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