7. Risk Assessment Concepts · Page 3 of 5
Exposure Factors to Score
Structure, lines, environment, and history of damage.

Structure factors
Height, isolation, rooftop equipment, and presence of external LPS.
Line factors
Overhead vs underground service, length of external LV/MV lines, and antenna towers.
History
Previous damaged VSDs, LED drivers, or telecom cards are strong evidence of inadequate staging.
