| Opening Dimensions | |||
| Grate Type | Grate Slope | a | b |
| A | 2H:1V | 670 | 52 |
| A | 3H:1V | 632 | 71 |
| A | 4H:1V | 618 | 78 |
| A | 6H:1V | 608 | 83 |
| A | Horizontal | 600 | 87 |
| Standard Bottom Heights (mm) | |
| A | 1219 |
| B | 1372 |
| C | 1524 |
| D | 1676 |
| E | 1829 |
| F | 1981 |
| G | 2134 |
| Standard Top Heights (mm) | |
| A | 305 |
| B | 457 |
| C | 610 |
Details
- Designed in accordance with OPSD 705.030.
- Standard opening size – 400mm diameter.
- Riser sections available – 305, 457, 610, 914, and 1219mm.
- All dimensions are in millimeter unless otherwise shown.
- Honey comb grating manufactured in accordance with OPSD 403.010 – Type A.
- See here how ditch inlets are incorporated into maintenance holes.
- IPEX/Plastech ICD backplates available