Lightning Rod
Calculate Lightning Rod instantly with the exact formula and a worked example.
Lightning Rod
Height of protected objectm
Required protection radius at that heightm
Zone A, 99.5 % reliability (1 = yes, 0 = zone B, 95 %)
Lightning rod height
13.1884m
Top of protection zone
12.13m
Zone radius at ground level
19.78m
More about: Lightning Rod
What it calculates
The “Lightning Rod” calculator computes Lightning rod height in m from 3 parameters: height of protected object (m), required protection radius at that height (m), zone a, 99.5 % reliability (1 = yes, 0 = zone b, 95 %).
Used in design, material estimation, and structural calculations.
Example calculation
With parameters Height of protected object = 6 m, Required protection radius at that height = 10 m, Zone A, 99.5 % reliability (1 = yes, 0 = zone B, 95 %) = 0 the result is 13.19 m (Lightning protection must be designed to current standards (Russian SO 153-34.21.122-2003)).
How to use
- Enter height of protected object, required protection radius at that height and zone a, 99.5 % reliability (1 = yes, 0 = zone b, 95 %) — each field above is adjustable with a slider.
- Lightning rod height (m) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Lightning Rod calculated?
The Lightning Rod calculator computes Lightning rod height (in m) from height of protected object, required protection radius at that height, zone a, 99.5 % reliability (1 = yes, 0 = zone b, 95 %). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Lightning Rod calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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