Category

Q

RMR

GSI Calculated/Estimated

Value

Class

Value

Class

From Q’

From RMR

From Hoek-Brown Chart

Value

Class

Value

Class

Value

Class

Minimum

4.17

Fair

53

Fair

56.85

Good

48

Fair

45

Fair

Maximum

16.33

Good

71

Good

69.14

Good

66

Good

65

Good

Average

9.58

Fair

62

Good

64.34

Good

57

Good

55

Fair

Mean

11.92

Good

63

Good

66.30

Good

58

Good

56

Good