... bearing bar comes in the form of an I-Section. I-Bar Type Steel Grating is used where high ... 85, 25, 30, 30.16, 30.3, 34.3, 35, 40, 41, 60 mm. c) Pitch of cross bar: ... ) 3) UK: BS4592 - 1987 4) Australia: AS1657 - 1985Specification of I Bar Type Steel Grating NoItemDescription1Bearing bar25x5x3,32x5x3,38x5x3,50x7x4,60x7x4 ... 85, 25, 30, 30.16, 30.3, 34.3, 35, 40, 41, 60 mm. US standard: 1"x3/16", ...