Determination of Required Quality Level

(1)P The detail categories in tables 5.1.1 to 5.1.5 represent the maximum fatigue strength permitted by this code for the detail in question when manufactured to the quality requirements of Annex D, and shall not be exceeded without further substantiation by test (see Annex C).

(2)P The higher class details often require additional inspection and demand higher workmanship standards (see Annex D), which can have an adverse effect on the economy of manufacture. Inspection and workmanship standards shall be determined by the quality level appropriate to the particular fatigue performance requirements and not by the maximum potential fatigue resistance.

(3)P The required quality level at a detail shall be obtained by determining the lowest fatigue strength curve from where Miner's summation DL does not exceed unity (see 2.2.2(2)g). Where stress fluctuations occur in more than one direction at a detail different class requirements may be found for each direction.

(4)P The quality level for welded joints shall be determined from table 6.1.1.

Table 6.1.1. Determination of quality level for welded joints

Lowest detail category Actc for which Ai, < 1''

Required quality level

62,

55

Fat 62

49,

44

Fat 49

39,

35

Fat 39

31,

28

Fat 31

25,

22

Fat 25

20 and below

Normal

Note 1 : assuming mi and m2 remain constant

0 0

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