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Official Journal of the Japan Wood Research Society

Table 1 Characteristics of stake group and their apparent service lives

From: Comparison of durability of treated wood using stake tests and survival analysis

Preservative

Estimated retention (kg/m3)

Performance classification

Abbreviation of stakes

Site name

Wood species

Service life

AAC-1

4.0

K2

AAC-K2

Nara

Japanese cedar

8.5

6.1

K3

AAC-K3

8.5

3.4

K2

AAC-K2

4.5

5.8

K3

AAC-K3

6

AAC-1a

4.3

K3b

AAC-K3

7

8.8

K4b

AAC-K4

9

13.2

K4

AAC-K4

10

15.9

K4

AAC-K4

9

25.2

K4

AAC-K4

9

27.2

K4

AAC-K4

9

AAC-1

5.4

K3

AAC-K3

12

NCU-E

0.5

K2

NCU-K2

12

1.0

K3

NCU-K3

17

1.5

K4

NCU-K4

20

NZN-E

1.0

K2

NZN-K2

6

1.5

K2

NZN-K2

7.5

VZN-E

1.2

K2b

VZN-K2

7

2.5

K3

VZN-K3

9

3.4

K3

VZN-K3

9

ACQ-1

2.8

K3

ACQ-2.8

15

3.8

K3

ACQ-3.8

19

4.5

K3

ACQ-4.5

22

1.28

K2b

ACQ-cK2

Ibaraki

14

1.92

K2

ACQ-cK2

20

2.57

K3b

ACQ-cK3

> 29

3.85

K3

ACQ-cK3

> 29

5.13

K4b

ACQ-cK4

> 29

1.28

K2b

ACQ-hK2

Western hemlock

15.5

1.92

K2

ACQ-hK2

16.5

2.57

K3b

ACQ-hK3

26.5

3.85

K3

ACQ-hK3

> 29

5.13

K4b

ACQ-hK4

> 29

  1. aPreservative contained termiticides
  2. bPreservative retention of stakes was just below the value required by the JAS 1083 [16]