This standard specifies that among the main structural materials of steel structures, the stress is significantly high in the direction of the plate thickness.
KS D 0040-2004 history
2020KS D 0040-2020 Acceptance criteria and classification of structural steel plate and wide flat for building by ultrasonic testing
2014KS D 0040-2014 Classification of structural rolled steel plate and wide flat for building by ultrasonic test
2004KS D 0040-2004 Classification of structural rolled steel plate and wide flat for building by ultrasonic test
1984KS D 0040-1984 Classification of structural rolled steel plate and wide flat for building by ultrasonic test