Ill. Admin. Code tit. 35, § 570.APPENDIX H
| Type1 | Maximum Flow Qf (gpm) | Slope | Dimensions | Materials2 | Weirs3 | Diagram |
| ½ Pipe | 150 | level | 8" diam. | PVC | 30° V-notch | A |
| 225 | level | 10" | PVC | 30° V-notch | B | |
| Box Trough | 225 | level | 6" x 6" | 2" x 8" dimension lumber | 30° V-notch | C |
| Aluminum Guttering | (Size with the Box Trough Criteria Above) |



CROSS-SECTION VIEW
