Steel Grating
STEEL GRATING STANDARDS: CHINA:YB/ T4001-1998 U.S.A.:ANSI/ NAAMM(MBG531-88) U.K.:BS4592-1987 NOTES: 1. Bearing bar pitches may be 15 to 22, 25, 30, 32.5, 34, 40, 50, 60, 80, 90mm, of which 25, 30, 34 and 40mm are recommended. 2. Cross bar pitches maybe ...