Page 71 - 35_DS702_E_2014_Lightning_Protection_Guide

Height of the air- Class of LPS I Class of LPS II Class of LPS III Class of LPS IV
termination rod Distance Distance Distance Distance
h in m Angle α a in m Angle α a in m Angle α a in m Angle α a in m
1 71 2.90 74 3.49 77 4.33 79 5.14
2 71 5.81 74 6.97 77 8.66 79 10.29
3 66 6.74 71 8.71 74 10.46 76 12.03
4 62 7.52 68 9.90 72 12.31 74 13.95
5 59 8.32 65 10.72 70 13.74 72 15.39
6 56 8.90 62 11.28 68 14.85 71 17.43
7 53 9.29 60 12.12 66 15.72 69 18.24
8 50 9.53 58 12.80 64 16.40 68 19.80
9 48 10.00 56 13.34 62 16.93 66 20.21
10 45 10.00 54 13.76 61 18.04 65 21.45
11 43 10.26 52 14.08 59 18.31 64 22.55
12 40 10.07 50 14.30 58 19.20 62 22.57
13 38 10.16 49 14.95 57 20.02 61 23.45
14 36 10.17 47 15.01 55 19.99 60 24.25
15 34 10.12 45 15.00 54 20.65 59 24.96
16 32 10.00 44 15.45 53 21.23 58 25.61
17 30 9.81 42 15.31 51 20.99 57 26.18
18 27 9.17 40 15.10 50 21.45 56 26.69
19 25 8.86 39 15.39 49 21.86 55 27.13
20 23 8.49 37 15.07 48 22.21 54 27.53
21 36 15.26 47 22.52 53 27.87
22 35 15.40 46 22.78 52 28.16
23 36 16.71 47 24.66 53 30.52
24 32 15.00 44 23.18 50 28.60
25 30 14.43 43 23.31 49 28.76
26 29 14.41 41 22.60 49 29.91
27 27 13.76 40 22.66 48 29.99
28 26 13.66 39 22.67 47 30.03
29 25 13.52 38 22.66 46 30.03
30 23 12.73 37 22.61 45 30.00
31 36 22.52 44 29.94
32 35 22.41 44 30.90
33 35 23.11 43 30.77
34 34 22.93 42 30.61
35 33 22.73 41 30.43
36 32 22.50 40 30.21
37 31 22.23 40 31.50
38 30 21.94 39 30.77
39 29 21.62 38 30.47
40 28 21.27 37 30.14
41 27 20.89 37 30.90
42 26 20.48 36 30.51
43 25 20.05 35 30.11
44 angle α 24 19.59 35 30.81
45 23 19.10 34 30.35
46 33 29.87
47 32 29.37
48 32 29.99
49 31 29.44
50 30 28.87
51 30 29.44
52 height h of the 29 28.82
53 air-termination 28 28.18
54 rod 27 27.51
55 27 28.02
56 26 27.31
57 distance a 25 26.58
58 25 27.05
59 24 26.27
60 23 25.47
Table 5.1.1.4 Protective angle α depending on the class of LPS

70 LIGHTNING PROTECTION GUIDE www.dehn-international.com