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Table 5.1a Fatigue classification of welded details

           Description of    Explanatory comments   Examples showing crack sites                   BS 8118      BS 5500
           detail                                                                                  Classification  Classification
           Transverse butt
           weld
                             Weld machined flush                                                    42           D





                             As welded with good                                                   35           D
                             profile, weld blends
                             smoothly with the
                             parent metal, eg
                             automatic weld
                             Less desirable profile,                                                29           E
                             welds with peaky profile,
                             multiple stop/starts
                             Backing strip weld                                                    24           F
                             without tack welds,
                             cracking from root
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