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| φ, %, t | |||
| t ≤12 | 12 < t ≤ 24 C | t > 24 | |
| φΒ < 60 | φΒ < 50 | φ <40 | |
| 60 ≤ φΒ ≤ 75 | 50 ≤ φ, ≤ 60 | 40 ≤ φ ≤ 50 | |
| 75<φΒ | 60 < φΒ ≤ 75 | 50 < φΒ ≤ 60 | |
| - | 75 < φ | 60 <φΒ |
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| 50-60 | ||
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