5: Incorporation roof structures
Smoke and heat extraction roof
light domes must protected
from direct lightning strikes.5.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
2.0 total area
2. S
shape), because they are flexible lines.2 Changes length due temperature
At higher temperatures, e.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 2.4 have proved effective.
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
.0 length the structure
Non-metal 0.4: Expansion pieces compensate changes in
length due temperature
2.1.g. summer, the length of
the air-termination systems and down-conductors
changes. Ex-
pansion pieces must allow flexible response to
changes length, either through their shape (e.5 above the air-termination system
Table 2. These temperature-related changes length
must taken into account during installation.1. 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.g.
Roof structures Dimensions
Metal
0.3 above roof level
1. For practic-
al purposes, the expansion piece spacings listed in
Table 2
