gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
160227-2357 EST
A building in town claims to have the world's largest copper roof.
See http://www.copper.org/publications/newsletters/discover/2004/Ct98/copper_roof.html
This is located at approximatrely 42.3181528, -83.6830368 .
My son-in-law works in this building and I have ask him to see if any building people know anything about lightning strikes to the building. No feedback yet.
I doubt that there is any instrumentation on any of the grounding conductors. But it would be interesting to know current magnitudes. A large flat surface provides a low impedance to high frequency currents. So this roof should provide good conductivity until it reaches grounding conductors. Thus, for a short time the roof could have a high potential relative to the earth around the building.
Suppose you had a ground path resistance of 1 ohm, then a 10,000 A lightning current would produce a voltage rise of 10,000 V. Just something to think about.
An interesting link http://www.bdcnetwork.com/blog/are-metal-roofs-lightning-magnets .
There is also a herd of buffalo on the property.
.
A building in town claims to have the world's largest copper roof.
See http://www.copper.org/publications/newsletters/discover/2004/Ct98/copper_roof.html
This is located at approximatrely 42.3181528, -83.6830368 .
My son-in-law works in this building and I have ask him to see if any building people know anything about lightning strikes to the building. No feedback yet.
I doubt that there is any instrumentation on any of the grounding conductors. But it would be interesting to know current magnitudes. A large flat surface provides a low impedance to high frequency currents. So this roof should provide good conductivity until it reaches grounding conductors. Thus, for a short time the roof could have a high potential relative to the earth around the building.
Suppose you had a ground path resistance of 1 ohm, then a 10,000 A lightning current would produce a voltage rise of 10,000 V. Just something to think about.
An interesting link http://www.bdcnetwork.com/blog/are-metal-roofs-lightning-magnets .
There is also a herd of buffalo on the property.
.