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
| May 29, 2014
7 cost-effective ways to make U.S. infrastructure more resilient
Moving critical elements to higher ground and designing for longer lifespans are just some of the ways cities and governments can make infrastructure more resilient to natural disasters and climate change, writes Richard Cavallaro, President of Skanska USA Civil.
| May 29, 2014
Wood advocacy groups release 'lessons learned' report on tall wood buildings
The wood-industry advocacy group reThink Wood has released "Summary Report: Survey of International Tall Wood Buildings," with informatino from 10 mid-rise projects in Europe, Australia, and Canada.
| May 29, 2014
Five finalists, including SOM and Zaha Hadid, chosen in competition for Sweden's tallest skyscraper
In Sernecke's competition to design Sweden's tallest skyscraper, five finalists have been selected: Manuelle Gautrand Architects, Ian Simpson Architects, SOM, Wingårdhs Arkitektkontor, and Zaha Hadid Architects.
| May 29, 2014
Retail renovation trends: Omni-channel shopping, personalized experiences among top goals of new store designs
In pursuit of enhanced customer experiences, retailers are using Big Data, interactive technology, and omni-channel shopping to transform their bricks and mortar locations.
| May 28, 2014
Video Blog: How today’s construction firms are bridging the BIM gap
Turner Construction and Parsons Brinckerhoff talk about how BIM has revolutionized the way that they conduct projects, and how technology has allowed them to leverage collaboration in such a way that they can work with decentralized teams.
| May 28, 2014
KPF's dual towers in Turkey will incorporate motifs, symbols of Ottoman Empire
The two-building headquarters for Turkey’s largest and oldest financial institution, Ziraat Bank, is inspired by the country’s cultural heritage.
| May 28, 2014
Moshe Safdie's twin residential towers in Singapore will be connected by 'sky pool' 38 stories in the air [slideshow]
Moshe Safdie's latest project, a pair of 38-story luxury residential towers in Singapore, will be linked by three "sky garden" bridges, including a rooftop-level bridge with a lap pool running the length between the two structures.
| May 27, 2014
Supergreen Venter lab displayed in new walk-through video
ZGF Architects' La Jolla building for genomics pioneer J. Craig Venter and his nonprofit research organization aims to be the first net-zero energy, carbon-neutral biological lab.
| May 27, 2014
America's oldest federal public housing development gets a facelift
First opened in 1940, South Boston's Old Colony housing project had become a symbol of poor housing conditions. Now the revamped neighborhood serves as a national model for sustainable, affordable multifamily design.
| May 27, 2014
One World Trade Center cuts rents due to sluggish activity
Sluggish economy and lackluster leasing force developer The Durst Organization and the Port Authority of New York and New Jersey to reduce asking rents by nearly 10% to $69/sf.