STEEL FLAT 25 X 50 MM TO SPECN. BS: 3S144: 1995 ( 1999 ) GD. S144D, STEEL SHEET SIZE 3MM THICK TO SPECN: STA- 60 ' A ' CONDITION., STEEL SHEETS TO SPECN. STA- 60- A CONDITION TO SIZE 1000 MM X 2500 MM X 12MM THICK. MATERIAL COND. A WITH, ST. SQR. 75MM +/- 5MM TO SPCN. BS: 3S144: 1995 ( 1999 ) GD S144 D, LFVD ROUTE WITH CALCIUM SILICATE SULPHUR, ST. SQUARE 75MM TO SPECN. IS: 5517- 1993, 40 Ni6 Cr4 Mo3 ( RS- 100 )