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
| Nov 28, 2012
Francis Cauffman appoints Stainbrook Director of Higher Education
Stainbrook has 16 years of experience as a strategic planner and urban designer working on complex projects on- and off-campus.
| Nov 27, 2012
SFIA releases technical guide for cold-formed steel framing products
The 114-page book covers both structural and non-structural applications, including section properties of SFIA member product profiles, and complete load and span tables for most applications.
| Nov 21, 2012
Architecture Billings Index positive for third straight month
All regions reporting positive business conditions
| Nov 20, 2012
PC Construction completes Juniper Hall at Champlain College
Juniper Hall is on track for LEED Gold certification from the U.S. Green Building Council.
| Nov 20, 2012
SchenkelShultz-designed Valencia at Lake Nona certified 3 Green Globes
Featuring the latest technologies, the three-story, academic facility includes academic spaces and teaching laboratories, student services, a book store, library, café, a Dean’s suite and administrative offices.
| Nov 14, 2012
U.S. Green Building Council partners with Pearson
Partnership will help further USGBC’s mission by advancing green building education
| Nov 14, 2012
U.S. Green Building Council announces grant from Google to catalyze transformation of building materials industry and indoor health
Focus is on healthy building materials to promote indoor environmental quality and human health
| Nov 14, 2012
USGBC's Greenbuild International Conference and Expo kicks off in San Francisco
7,000 members of the green building industry convene for opening plenary headlined by "Morning Joe" co-hosts Mika Brzezinksi and Joe Scarborough
| Nov 13, 2012
Have colleges + universities gone too far with "Quality of Life" buildings?
We'd like your input - recent projects, photo/s, renderings, and expert insight - on an important article we're working on for our Jan 2013 issue
| Nov 13, 2012
Turner Construction’s green building Market Barometer reveals new findings on green building and certification
Respondents indicated a widespread commitment to sustainable practices