A New Statistical Parameter for Determining Joint Roughness Coefficient (JRC) considering the Shear Direction and Contribution of Different Protrusions

Table 2

The WPA values of 10 joint profiles in different directions (SI = 0.5 mm).

Number of joint profiles	Direction 1		Direction 2
	WPA	m	WPA	m
1	2.35	84	2.29	116
2	3.11	97	2.79	103
3	3.42	87	3.13	113
4	4.35	88	4.97	112
5	4.43	102	3.55	98
6	4.50	90	5.16	110
7	5.18	97	4.87	103
8	6.17	104	6.09	96
9	7.87	105	6.74	95
10	8.47	89	8.50	111