| 级配范围 | 通过下列筛孔(mm)的质量百分率(%) | ||||||||
| 9 | 7 | 4.75 | 2.36 | 1.18 | 0.60 | 0.3 | 0.15 | 0.075 | |
| 级配上限 | 100 | 100 | 89 | 52.5 | 36 | 26 | 19 | 14 | 12 |
| 级配下限 | 100 | 88 | 79 | 42.5 | 26 | 16 | 9 | 6 | 4 |
| 中值级配 | 100 | 94 | 84 | 47.5 | 31 | 21 | 14 | 10 | 8 |
| 波动范围 |
| ±6 | ±5 | ±5 | ±5 | ±5 | ±5 | ±4 | ±4 |
| 指南级配的中值 | 100 | / | 80 | 57.5 | 39 | 26.5 | 18.5 | 12.5 | 10 |