The equivalent interception area is
a circle with radius three times the building’s height,
centred the building’s base.1 Frequency lightning strikes region
A large number countries maintain statistics the
frequency lightning strikes that country.
Further data can found national supplement to
the German standard DIN 62305-2.
1.2 Equivalent interception area
The risk analysis considers not just the real area of
the building but also the equivalent interception area
as areas risk from lightning.TBS
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Height the building structure
Width the building structure
Length the building structure
Equivalent interception area for direct lightning strikes
The effectiveness lightning protection system is
indicated assigning lightning protection class
between and IV:
• Lightning protection class greatest need for pro-
tection, e. Direct and nearby light-
ning strikes lead the coupling electric current into
building structures.g.7. Damage can also be
caused lightning striking supply lines leading into
the building, lightning striking close these lines.7.
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45
Chapter General introduction
. Thanks
to the BLIDS lightning location system, region-specific
data available for Germany, Austria and Switzerland. The standard
recommends doubling these values. hospitals
• Lightning protection class substantial need for
protection, potential explosive areas
• Lightning protection class III limited need for pro-
tection, housing
• Lightning protection class smallest need for
protection (not normally used Germany)
1
