The ridge conductor arranged on
the ridge and thus forms the “backbone” for the air-
termination system. Transfer the
protective angle the building.
TBS
Blitzschutz-Leitfaden
2018
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en
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2020/01/10
14:42:40
14:42:40
(LLExport_02613)
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2020/01/10
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14:42:54
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Chapter The external lightning protection system
. All building parts with-
in this angle are protected.
h: Building height
Protected area
Protective angle α
Dormer windows not protected the ridge cable
Protective angle method roof ridge
Lightning protective angle α
Ridge height m
Lightning protection classes II, III, IV
Diagram assist determining the protective angle
2nd step: Determining the protective angle
Example:
The height the building (in this case: is
entered onto the horizontal axis the diagram.1st step: Determining the height the building
Determine the ridge height the building. You can
now read the protective angle (α) off the vertical axis
(“1”). Then
proceed vertically until you meet the curve for your
lightning protection class (in this case: III). our example, the angle 62°. our example, the building is
10 high. This height
is the starting point for planning the entire lightning
protection system. All parts the building that not fall un-
der the protective angle are risk from direct light-
ning strikes
