IS: 1977 - 1975 (Incorporating Amendment No.1 & 2) (with Amendment No.3 - 1978); Specification for Structural Steel (ordinary Quality)

IS: 1977 - 1975 (Incorporating Amendment No.1 & 2) (with Amendment No.3 - 1978); Specification for Structural Steel (ordinary Quality) - New Delhi BIS 1977 - 14+1p

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