1.
TBS
Blitzschutz-Leitfaden
2018
/
en
/
2020/01/10
14:42:40
14:42:40
(LLExport_02613)
/
2020/01/10
14:42:54
14:42:54
67
Chapter The external lightning protection system
. S
shape), because they are flexible lines.5: Incorporation roof structures
Smoke and heat extraction roof
light domes must protected
from direct lightning strikes. Surge
protection devices protect the
electrical drives these devices
from damage due inductive
coupling.
Material Expansion piece spacing m
Steel 15
Stainless steel 10
Copper 10
Aluminium 10
Table 2. For practic-
al purposes, the expansion piece spacings listed in
Table 2. summer, the length of
the air-termination systems and down-conductors
changes.5.1.3 above roof level
1.2 Changes length due temperature
At higher temperatures, e.g.3 External lightning protection for roof struc-
tures
Roof structures must incorporated into the external
lightning protection system according IEC 62305-3
if they exceed the dimensions stated Table 2.
Roof structures Dimensions
Metal
0.TBS
Blitzschutz-Leitfaden
2018
/
en
/
2020/01/10
14:42:40
14:42:40
(LLExport_02613)
/
2020/01/10
14:42:54
14:42:54
2.5 above the air-termination system
Table 2.g.4: Expansion pieces compensate changes in
length due temperature
2. These temperature-related changes length
must taken into account during installation. Ex-
pansion pieces must allow flexible response to
changes length, either through their shape (e.4 have proved effective.0 length the structure
Non-metal 0.0 total area
2
