Page 33 - SIM Guide to annual assessment_v2.0_Dec 2021
P. 33

Steel





         CATEGORIZATION OF DEFECTS





         Members subject to vibration or slow movement



             INCLUDES:
             ▪   Structural members subject to vibration or slow motion.




             CATEGORIZATION / ACTION:
             ▪   The absence of washers, double nuts or similar locking mechanisms on
                 structures subject to vibration or low motion shall be categorized with LFF=
                 B (Likely)



             Examples:






                                                                                     VERTICAL
                                                                                     1.43 mm/s






         Members or bolts showing different size or material properties




             INCLUDES:
             ▪    A structural member, bolt, screw or nut which is made or seems to be
                  made of a different material than similar parts of the structure (i.e. Bolts
                  made of copper alloy instead of steel, high yield bolts replaced by general
                  use bolts, bolts of smaller diameter than other bolts).



             CATEGORIZATION / ACTION:
             ▪    Categorization shall be conservative: LFF= B (Likely)



             Examples:

















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