Table 4. The 1st and 2nd slip modulus of nail joint, and RMSE between predicted shear load in bi-linear curve and measured shear load

Type	Method	Slip modulus (kN/mm)		RMSE (kN)
		1st	2nd
M(G)S(L)	A1)	0.558	0.037	0.198
	B2)	0.618	0.033	0.168
	C3)	0.619	0.034	0.170
	D4)	0.595	0.040	0.230
	E5)	0.569	0.039	0.218
M(G)S(T)	A	0.554	0.037	0.207
	B	0.611	0.031	0.151
	C	0.613	0.032	0.161
	D	0.595	0.040	0.237
	E	0.567	0.039	0.221
M(P)S(L)	A	0.595	0.063	0.139
	B	0.671	0.056	0.106
	C	0.672	0.057	0.109
	D	0.641	0.068	0.165
	E	0.612	0.065	0.153
M(P)S(T)	A	0.509	0.060	0.112
	B	0.573	0.055	0.084
	C	0.574	0.055	0.085
	D	0.557	0.067	0.148
	E	0.533	0.065	0.137

Data from Karacabeyli and Ceccotti (1998).
Data from European Committee for Standardization (2005).
Data from Yasumura and Kawai (1997).
Data from CSIRO (1996).
Data from American Forest and Paper Association (2015).
RMSE: root-mean-squared error.