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
| Aug 8, 2012
Giants 300 Science & Technology Report
BD+C's Giants 300 Top 25 AEC Firms in the Science & Technology sector.
| Aug 7, 2012
Pioneering revival
Financial setbacks didn’t stop this Building Team from transforming the country’s first women’s medical school into a new home for college students.
| Aug 7, 2012
Shedding light on the arts
Renovating Pietro Belluschi’s Juilliard School opens the once-cloistered institution to its Upper West Side community.
| Aug 7, 2012
How to win more state and local government projects
With a huge building stock at their disposal, state and local governments can be attractive clients, especially in these difficult economic times.
| Aug 7, 2012
Pankow names Lum new CEO
Lum joined Pankow in 1980 in Hawaii and has held leadership roles in Pankow’s Honolulu and Northern California regional offices and was appointed president of the firm in 2009.
| Aug 7, 2012
Essex Builders to build church in Somerville, Mass.
The project’s design documents were prepared by Boston Bay Architects and reflect the church’s mission to serve the broader community as well as worship.
| Aug 6, 2012
Johnson Controls GWS appoints Genemaras as COO
Genemaras brings a wealth of experience in international business operations.
| Aug 3, 2012
Goettsch Partners opens new Abu Dhabi office
The GP Abu Dhabi office is managed by Steven M. Nilles, FAIA, LEED AP, a partner in the firm and resident of Abu Dhabi.
| Aug 3, 2012
Nonres construction spending to increase through 2012, growth projected for 2013
Commercial and industrial projects poised to lead building sectors.
| Aug 3, 2012
IBI Group Inc. acquires Taylor Young Limited
Taylor Young is a full services architectural practice including professional skills in urban planning and design and landscape architecture, based in Manchester, U.K.