How to Calculate Risk Index for Lightning Protection System according to BNBC? A Calculator for Risk Index Calculation!!!
Lightning Protection System
Whether a building needs protection from lightning depends on the probability of a stroke and acceptable level of risk. To assume the level of risk, risk assessment or risk index has to be calculated first. Risk index is depends on a set of indices which are discussed below.
Risk Index is the sum of all indices for all the factors based on a marginal risk index of 40.
Factor of Risk Assessment
1. Type of Structure
2. Type of Construction
3. Consequential Effect
4. Degree of Isolation
5. Type of Terrain
6. Height of Structure
7. Lightning Prevalence
Finally we can calculate the risk index of an structure by summing up the value for individual factor as stated value.
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