| BS Sieve Sizes | Binder course (%) | Wearing course (%) | |
| Inches | mm | ||
| 1” | 25.00 | 90 - 100 | 100 |
| 3/4 | 19.00 | 70 - 90 | 100 |
| 1/2 | 12.50 | 55 - 80 | 85 - 100 |
| 3/8 | 9.50 | 47 - 70 | 75 - 92 |
| 1/4 | 6.30 | 40 - 60 | 65 - 82 |
| No. 8 | 2.36 | 27 - 45 | 50 - 65 |
| No. 16 | 1.18 | 20 - 34 | 36 - 51 |
| No. 30 | 0.60 | 14 - 27 | 26 - 40 |
| No. 50 | 0.30 | 8 - 20 | 18 - 30 |
| No. 100 | 0.15 | 5 - 15 | 13 - 24 |
| No. 200 | 0.75 | 2 - 6 | 7 - 14 |
| Bitumen Content | 4.5 - 6.5 | 5.0 - 8.0 | |