Why risk assessment comes before the final design
The website should collect building geometry, use, occupancy/consequence information, site/lightning exposure, incoming services, existing protection, fire/special hazards, SPD/bonding status and other project data before representing a final risk conclusion.
What changed in the 2024 IEC edition
IEC states that the 2024 edition introduces updated risk concepts, a lightning ground strike-point density NSG in place of the older NG approach for expected dangerous events, and additional treatment of service availability and thunderstorm-warning measures.
How SN Engineering should present the result
Until the required inputs are complete, the correct website status is “Risk Assessment Pending” or “Ready for Engineering Review”—not an invented percentage score. After technical review, the report can record evaluated risk components, assumptions, protection measures and design basis.
Relationship to LPS class and protective measures
The risk process informs the protection measures to be adopted. A project must not present a freely selected LPS class as a final compliant outcome without the relevant risk/design basis and project requirements.
Engineering Reference Table
| Input group | Typical information required |
|---|---|
| Structure | Dimensions, use, construction, occupancy. |
| Site exposure | Project location and lightning exposure data. |
| Incoming services | Power, telecom, data and metallic services. |
| Existing measures | LPS, bonding, SPD, fire/special protection. |
| Output | Risk evaluation and appropriate protection measures. |
Project Implementation Checklist
For an actual project, record the applicable standard edition, risk-assessment assumptions, approved drawings, selected design method, calculation revision, component specification, inspection/testing requirements and final engineering approval.
Official Source
Use the official issuing body's publication for the controlled standard text and current status.