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Official Journal of the Japan Wood Research Society

Table 1 Sample information

From: Unique characteristics of residual stress distribution of large-diameter keyaki (Zelkova serrata) logs and examination of their measurement method

Form

Sample No.

Prefecture harvested

Harvesting date

Plank width (top/middle/bottom) (cm)

Plank length (cm)

Date of measurement

Experiment Fig. 3a

Experiment Fig. 3b

Experiment Fig. 3c

Experiment Fig. 3d

Experiment Fig. 3e

Tree

1

Tochigi

November 18th to 20th 2019

– / 62.5 / –

201

January 28th to 29th 2020

  

  

2

Tochigi

– / 89.0 / –

202

  

  

3

Tochigi

– / 76.0 / –

248

  

  

4

Tochigi

– / 78.0 / –

196

  

  

Log

5

Tochigi

Mid. of February 2019

– / 71.0 / –

Approx.300

July 9th to 10th 2019

  

  

6

Tochigi

March 15th 2019

– / 57.6 / –

Approx.260

  

  

7

Saitama

Autumn 2019 to Spring 2020

– / 72.0 / –

Approx.180

May 19th 2020

    

8

Saitama

68.5 / 71.0 / 74.5

181

    

9

Saitama

66.0 / 63.0 / 64.0

177

    

10

Saitama

71.0 / 72.5 / 90.0

199

    

11

Saitama

58.5 / 58.5 / 64.5

215

    

12

Saitama

54.1 / 62.2 / 86.0

Approx.210

    

13

Saitama

61.0 / 65.3 / 72.6

232

    

14

Saitama

55.0 / 60.8 / 79.5

290

 

   

15

Ibaraki

62.3 / 64.3 / 62.4

175

    

16

Ibaraki

66.5 / 64.4 / 87.0

280

    

17

Ibaraki

69.0 / 71.3 / 98.2

209

    

18

Ibaraki

60.9 / 62.3 / 73.0

270

 

   

19

Ibaraki

58.4 / 54.5 / 58.3

228

    

20

Ibaraki

49.4 / 47.0 / 52.0

207

 

   

21

Ibaraki

69.0 / 61.0 / 61.5

170

    

22

Shimane

68.0 / 75.0 / 85.0

211

    

23

Gifu

62.1 / 59.8 / 60.4

210

    

24

Saitama

Autumn 2019 to Spring 2020

54.0 / 54.0 / 59.5

186

May 20th 2020

    

25

Saitama

51.5 / 49.8 / 51.5

144

    

26

Saitama

47.7 / 47.7 / 49.1

158

    

27

Saitama

51.2 / 53.1 / 59.4

215

 

   

28

Saitama

48.2 / 46.6 / 48.9

212

    

29

Ibaraki

50.1 / 50.2 / 50.1

194

    

30

Ibaraki

52.5 / 51.0 / 55.0

204

    

31

Ibaraki

49.0 / 49.0 / 52.5

164

    

32

Ibaraki

43.4 / 43.5 / 46.0

150

    

33

Ibaraki

64.0 / 63.6 / 67.5

261

 

   

34

Ibaraki

49.5 / 51.5 / 53.1

205

    

35

Ibaraki

46.8 / 47.0 / 46.8

201

 

   

36

Tochigi

69.1 / 68.8 / 69.2

248

 

   

37

Hyogo

49.4 / 47.0 / 49.7

233

 

   

38

Hyogo

49.8 / 52.0 / 56.3

221

 

   

39

Hyogo

50.6 / 50.7 / 62.2

230

    

40

Hyogo

49.0 / 49.0 / 51.1

186

    

41

Toyama

62.9 / 62.6 / 83.8

294

 

   

42

Saitama

Autumn 2019 to Spring 2020

57.8 / 57.6 / 71.0

210

June 16th to 17th 2020

   

43

Saitama

69.0 / 71.0 / 82.6

216

   

44

Saitama

62.6 / 66.9 / 71.0

206

   

45

Saitama

66.6 / 68.0 / 70.0

402

 

  

46

Saitama

64.3 / 70.6 / 90.5

229

 

  

47

Saitama

66.0 / 68.0 / 73.5

193

   

48

Shimane

61.5 / 63.3 / 62.6

172

   

49

Saitama

72.0 / 78.4 / 81.0

173

   

50

Saitama

61.5 / 66.8 / 83.6

215

 

  

51

Saitama

58.0 / 54.8 / 56.6

323

 

  

52

Saitama

65.6 / 63.0 / 66.0

192

   

53

Saitama

56.2 / 59.0 / 61.4

202

   

54

Saitama

58.0 / 59.5 / 65.6

201

   

55

Shimane

64.6 / 67.3 / 79.0

234

   

56

Ibaraki

70.2 / 68.5 / 74.6

187

   

57

Ibaraki

66.0 / 67.1 / 73.5

206

   

58

Chiba

61.0 / 59.0 / 66.8

208

   

59

Gifu

49.5 / 54.1 / 66.0

314

 

  

60

Hyogo

59.6 / 61.4 / 66.5

214

   

61

Shimane

66.3 / 65.3 / 73.8

202

   

62

Fukui

Spring 2019

44.6 / 45.7 / 47.0

216