Road category/Design catalogue

Subgrade strength

DSN800 by Pavement class (80 kN axles)

3000 to 10,000

10,000 to 30,000

30,000 to 100,000

100,000 to 300,000

300,000 to 1,000,000

DCP DN

*

39

52

71

100

142

TRH 4

*

42

52

56 - 71

63 - 73

65 - 89

ORN 31

S2

S4

83

81

98

95

DCP CBR

S2

S4

59 (70 )**

50 (64)**

68 (78)**

67 (79)**

88 (92)**

84 (95)**

IRC

CBR = 3%

83

70 (no asphalt)