Ventilated breathe freely, not easy accumulation booty.
1.1 Grating Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS3101
1.2 Grating Dimension
Load Bearing Flat Bar size | Thickness≥3mm, depth ≥19mm |
19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4.7, 25X5…..40X6, 40X8, 40X10,….90X6…. | |
Pitch of Load bearding flat bars(mm) | 12.5,15, 20, 30, 30.6, 32.5, 34, 34.8, 35.3, 40, 60, 80…… |
Pitch of cross bars(mm) | 38.1, 50, 50.8, 70, 75, 80, 100, 101.6, 102…… |
The sizes and dimension is not limited to above.
1.3 Grating type: flat bar: plain type, plain I type, serrated type, serrated I type; cross bar: round type and square twisted type.
steel gratings trench cover
