... structure platforms, stair treads, sidewalks, drainages and well covers etc. We can design and manufacture standard steel grating and in customized ... ''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc (Mr. David Huang) 2Bearing Bar ... 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. (Mr. David Huang) 3Twisted Cross Bar ... 1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc (Mr. David Huang) 4Material GradeASTM A36, A1011 ...