Lightning Risk Assessment

Choose the selections and fill in the information that best describes your circumstances.  The more accurate the information, the more precise the risk assessment will be.  Submit the form for a full custom analysis.  For more information please email us.

Lightning Flash Density

Lightning is an awesome and terrifying act of nature that causes billions of dollars in property damage each year. Lightning kills more people each year than hurricanes and tornadoes combined. Although most areas in the United States are afflicted by thunderstorms and severe consequences of lightning, some regions are more sensitive than others. The map below shows the average lightning flash density for the United States in flashes/km2/year.

Please select the location of the designated structure.

Map of lightning densities

Structures' Collective Area: Structure type

Select the type of structure that is relative to your circumstances and enter the required values

Enter the dimensions for the structure type chosen:

Enter the dimensions for the structure type choosen:

Enter the dimensions for the structure type choosen:

Relative Structure Location

Select relative structure location based on the drawing selected above

Type of Construction



Structure Contents
Lightning Consequence

Lightning Protection may be optional

It is determined that lightning protection is optional for your facility; however, in many cases, it is still recommended.

There are several special cases, not addressed by this lightning risk assessment, that may render the site more or less suspceptibale to lightning. In these situations, it is recommended that the user seek professional advice.

ALLTEC has the capability to perform a detailed risk analysis as per NFPA-780 in addition to the simple risk analysis.

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