Density Chart
| Density | Class |
|---|---|
| Less than 1 | 400 |
| 1 but less than 2 | 300 |
| 2 but less than 4 | 250 |
| 4 but less than 6 | 150 |
| 6 but less than 8 | 125 |
| 8 but less than 10 | 100 |
| 10 but less than 12.5 | 92.5 |
| 12.5 but less than 15 | 85 |
| 15 but less than 22.5 | 70 |
| 22.5 but less than 30 | 65 |
| Greater than 30 | 60 |