| Parameter | Range of values |
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| Point load strength | Values | 8 | 4 - 8 | 2 - 4 | 1 - 2 | Use of compressive strength is preferred | Do | do |
| Rating | 15 | 12 | 7 | 4 | 2 | 1 | 0 | |
| RQD | Values | 90 - 100 | 75 - 90 | 50 - 75 | 25 - 50 | <25 |
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| Rating | 20 | 17 | 13 | 8 | 3 |
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| Joint spacing | Values | >2 | 0.6 - 2 | 0.2 - 0.6 | 0.06 - 0.2 | <0.006 |
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| Rating | 20 | 15 | 10 | 8 | 5 |
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| Joint condition | Values | Very rough surfaces. Not continuous No separation Unweathered wall rock | Slightly rough surfaces Separation < 1 mm Slightly weathered walls | Slightly rough surfaces Separation < 1 mm Highly weathered walls | Slickensided surfaces. or Gouge < 5 mm thick or Separation 1 - 5 mm Continuous | Soft gouge >5 mm thick or Separation > 5 mm Continuous |
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| Rating | 30 | 25 | 20 | 10 | 0 |
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| Ground water condition | Values | Completely dry | Damp | Wet | Dripping | flowing |
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| Rating | 15 | 10 | 7 | 4 | 0 |
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