Table 2 Compressed layer(s) number and thickness, and density of the sandwich compressed timbers (SCT)

Sugi heartwood

Control

0

–

–

0.706 (0.079)

–

–

–

–

0.336 (0.035)

Surface

6

2

0.661 (0.060)

0.834 (0.060)

0.681 (0.085)

0.641 (0.056)

2.68 (0.38)

2.50 (0.55)

0.394 (0.044)

Interior

2

0.624 (0.079)

0.740 (0.060)

0.631 (0.041)

0.617 (0.065)

2.63 (0.39)

2.52 (0.57)

0.410 (0.052)

Center

1

0.694 (0.089)

0.852 (0.012)

0.694 (0.089)

6.05 (0.55)

0.411 (0.042)

Surface

10

2

0.776 (0.073)

0.903 (0.096)

0.805 (0.064)

0.747 (0.085)

3.40 (0.60)

3.54 (0.57)

0.495 (0.007)

Interior

2

0.681 (0.033)

0.816 (0.051)

0.659 (0.034)

0.703 (0.042)

4.04 (0.44)

3.86 (0.75)

0.497 (0.009)

Center

1

0.736 (0.065)

0.850 (0.037)

0.736 (0.065)

7.64 (1.27)

0.496 (0.018)

Sugi sapwood

Control

0

–

–

0.710 (0.065)

–

–

–

–

0.464 (0.032)

Surface

6

2

0.727 (0.054)

0.833 (0.056)

0.712 (0.073)

0.742 (0.065)

2.97 (0.26)

3.20 (0.63)

0.559 (0.022)

Interior

2

0.721 (0.044)

0.827 (0.039)

0.726 (0.050)

0.716 (0.050)

2.68 (0.39)

3.02 (0.60)

0.562 (0.025)

Center

1

0.736 (0.065)

0.850 (0.037)

0.736 (0.065)

7.64 (1.27)

0.513 (0.023)

Surface

10

2

0.736 (0.055)

0.823 (0.061)

0.739 (0.080)

0.733 (0.054)

3.90 (0.60)

4.28 (0.95)

0.641 (0.037)

Interior

2

0.723 (0.079)

0.794 (0.075)

0.724 (0.099)

0.722 (0.064)

4.83 (0.69)

5.19 (0.45)

0.652 (0.016)

Center

1

0.690 (0.043)

0.791 (0.034)

0.690 (0.043)

8.85 (0.89)

0.631 (0.026)

Hinoki

Control

0

–

–

0.611 (0.034)

–

–

–

–

0.481 (0.029)

Surface

5

2

0.816 (0.040)

0.907 (0.023)

0.849 (0.048)

0.782 (0.027)

3.03 (0.46)

2.40 (0.26)

0.571 (0.017)

Interior

2

0.773 (0.059)

0.871 (0.089)

0.799 (0.074)

0.746 (0.051)

3.10 (0.47)

2.71 (0.40)

0.580 (0.013)

Center

1

0.744 (0.068)

0.850 (0.097)

0.744 (0.068)

6.94 (0.72)

0.584 (0.046)