Moment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 3 Comparisons of measured and predicted values of Ply-lam

Structural property	Shear test			Bending test
	Measurement	Prediction		Measurement	Prediction
	Measurement	By reference value	By tested value	Measurement	By reference value	By tested value
Bending stiffness (10¹² × N mm²)
Average value				0.48^a	0.40^b
Difference^c					16.7%
Moment capacity (10⁶ × N mm)
5th percentile value				14.6^d	5.2^e	13.7^f
Difference					64.4%	6.2%
Shear capacity (kN)
5th percentile value of measured data	51.6^g	48.0^h	55.8ⁱ
Difference		7.0%	− 8.1%
5th percentile value by CMLE	62.4^j	48.0	55.8
Difference		23.1%	10.6%

^aAverage value of experimental data measured by Eq. 2
^bPredicted value by transformed section of Ply-lam from Eq. 3
^cDifference between measured and predicted value: (measured value − predicted value)/measured value × 100
^d5th percentile value of experimental data measured by Eq. 4
^ePredicted value by Eq. 5 and reference value of No. 3 visual grade timber in Korean Design Standard in Table 1
^fPredicted value by Eq. 5 and 5th percentile value of No. 3 visual grade timber in experimental data in Table 1
^g5th percentile value of experimental data measured by Eq. 6
^hPredicted value by Eq. 8 and rolling shear strength of plywood in Korean Design Standard in Table 1
ⁱPredicted value by Eq. 8 and rolling shear strength of plywood in experimental data in Table 1
^j5th percentile value by censored maximum likelihood evaluation (bending failure was counted as a censored data)