YILDIRIM RİSK HESABI
( Koruma Seviyesi Seçimi - NFC 17-102 Standardı )
Dimensions of the structure
Maximum Length
L
m
Maximum Width
W
m
Maximum Height
H
m
The distance between the lightning rod and the farthest point to be protected from lightning.
m
C1 - Environment Coefficient
Surrounded by structures or trees of the same height or higher
0,25
Surrounded by smaller structures
0,5
No other structures within a distance equal to the height
1
Isolated on top of a hill
2
C2 - Structural Coefficient
Structure / Roof
Metallic
Common
Flammable
Metallic
0,5
1
2
Common
1
1
2,5
Flammable
2
2,5
3
C3 - Structural Coefficient
Non flammable
0,5
Flammable
1
Valuable or partially flammable
2
High value, highly flammable, explosive
3
C4 - Structure Occupancy
Unoccupied
0,5
Occupied
1
Difficult evacuation
3
C5 - Lightning Consequences
Service continuity not required
1
Service continuity required without consequences
5
Consequences on the environment
10
Annual Average Thunder Days
Annual Average Thunder Days
( World Map )
Exit
Clear
Example Calculation
Calculate
