



| Opening Dimensions | |||
| Grate Type | Grate Slape | a | b |
| B | 2H:1V | 670 | 52 |
| B | 3H:1V | 632 | 71 |
| B | 4H:1V | 618 | 78 |
| B | Horizontal | 600 | 87 |
| Opening Dimensions | ||||
| Grate Type | Grate Slape | a | b | c |
| C | 2H:1V | 1341 | 66 | 1473 |
| C | 3H:1V 1 | 1265 | 104 | 1473 |
| C | 4H:1V | 1237 | 118 | 1473 |
| B | 6H:1V | 1216 | 65 | 1346 |
| B | Horizontal | 1200 | 73 | 1346 |