Lightning Alley is not just a catchy name for a street or the local bowling lanes. It's the name dubbed to a notorious region in central Florida that is in the heart of the most lightning-prone area in the entire country. And that lightning strike may come at the most inopportune time.
Not only can this force of nature cause bodily injury and severe damage to property, it also has the power to disrupt or destroy a police department's 9-1-1 communications system, which is intended to assist residents during an emergency. That's exactly what happened in the middle of one Florida storm.
When a Walmart in the city of Bushnell was relocated, the facility was donated to the county for their use. The Sumter County Sheriff's Department decided to open its new offices in this building, including housing its emergency communications there.
One serious problem was that the electrical system was built for a 1970's vintage department store, not a critical communications and public safety facility. During one lightning storm in particular, the 9-1-1 system failed, leaving county residents without police, fire or ambulance response.
Inspection of the existing electrical system showed that it was badly flawed, mainly due to improper connectors and poor bonding and grounding. The communications tower, for example, had its own independent and inadequate grounding. The emergency generators and building structure were all independently grounded, each with its own ground rod, exposing its poor design. The main grounding electrode consisted of a single galvanized steel rod from the 1970s, with very high resistance to earth.
A new system was designed and installed for under $40,000, a minimal cost considering the value of the equipment protected, and improved public safety it brought to the residents of Sumter County.
"To be effective, the entire grounding system needs to be properly designed, using listed connectors and corrosion resistant materials," said Dave Brender, National Program Manager for the Copper Development Association, CDA. "Lightning protection systems in particular must be well-grounded to work properly, and could make matters worse if they are not. Copper and its alloys are the most common materials in use for this application because they provide superior corrosion resistance and avoid oxidation problems at connections.
Copper is also easy to install and durable," Brender added.
Central Florida is not the only region in the U.S. affected by severe weather. Similar 9-1-1 and broadcast facilities are employed in areas all over the country where communications is critical and the chances for lightning strikes are quite high. Having proper copper-based grounding and bonding should be a top priority where an entire system can get crippled by lightning.
Related Stories
| Jul 22, 2013
Top K-12 School Sector Architecture Firms [2013 Giants 300 Report]
DLR, SHW top Building Design+Construction's 2013 ranking of the largest K-12 school sector architecture and architecture/engineering firms in the U.S.
| Jul 22, 2013
Top University Sector Construction Firms [2013 Giants 300 Report]
Whiting-Turner, Turner, Skanska top Building Design+Construction's 2013 ranking of the largest university sector contractors and construction management firms.
| Jul 22, 2013
Top University Sector Engineering Firms [2013 Giants 300 Report]
Affiliated Engineers, URS, AECOM top Building Design+Construction's 2013 ranking of the largest university sector engineering and engineering/architecture firms in the U.S.
| Jul 22, 2013
Top University Sector Architecture Firms [2013 Giants 300 Report]
Cannon, Perkins+Will, Stantec top Building Design+Construction's 2013 ranking of the largest university sector architecture and architecture/engineering firms in the U.S.
| Jul 22, 2013
Top Office Sector Construction Firms [2013 Giants 300 Report]
Turner, Structure Tone, PCL top Building Design+Construction's 2013 ranking of the largest office sector contractors and construction management firms in the U.S.
| Jul 22, 2013
Top Office Sector Engineering Firms [2013 Giants 300 Report]
AECOM, Parsons Brinckerhoff, Jacobs top Building Design+Construction's 2013 ranking of the largest office sector engineering and engineering/architecture firms in the U.S.
| Jul 22, 2013
Top Office Sector Architecture Firms [2013 Giants 300 Report]
Gensler, HOK, Perkins+Will top Building Design+Construction's 2013 ranking of the largest office sector architecture and architecture/engineering firms in the U.S.
| Jul 22, 2013
Market gains encourage better workplace design [2013 Giants 300 Report]
The commercial office sector is finally heating up, led by corporate headquarter and medical office building projects.
| Jul 22, 2013
Top Hotel Construction Firms [2013 Giants 300 Report]
Manhattan Construction, Structure Tone, Lend Lease top Building Design+Construction's 2013 ranking of the largest hotel contractors and construction management firms in the U.S.
| Jul 22, 2013
Top Hotel Engineering Firms [2013 Giants 300 Report]
AECOM, Parsons Brinckerhoff, Buro Happold top Building Design+Construction's 2013 ranking of the largest hotel engineering and engineering/architecture firms in the U.S.