Simplified Iec Risk Assessment Calculator Sirac __top__ Jun 2026

The is a specialized software tool originally introduced by the International Electrotechnical Commission (IEC) to streamline complex lightning protection calculations. It was first presented in Annex J of the 2006 edition of IEC 62305-2 , the international standard for lightning risk management. What is SIRAC?

To understand how SIRAC works, it is essential to understand the four primary risks defined by the IEC standard that the calculator evaluates: Loss of human life or permanent injury. Risk 2 ( R2cap R sub 2 simplified iec risk assessment calculator sirac

, the user can simulate adding protective measures—such as installing a Class I to IV LPS or adding specific Surge Protection Devices (SPDs)—to see how much the risk value drops. The is a specialized software tool originally introduced

The physical geometry of the building dictates its "equivalent collection area"—the mathematical zone around the structure most likely to attract lightning. Length, width, and height of the building. Roof type (e.g., flat, sloped, metallic, combustible). 2. Environmental and Geographical Factors To understand how SIRAC works, it is essential

SIRAC evaluates risk by breaking it down into four distinct categories defined by the IEC. The calculator assesses each applicable risk to see if it exceeds the tolerable risk limit ( RTcap R sub cap T ) established by international standards. Risk 1 ( R1cap R sub 1

The standard categorizes loss into four types: