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 31, 2012
Cohen rejoins Deloitte’s capital projects practice
Cohen has more than 20 years of dispute resolution, project advisory, and risk management experience spanning a wide range of domestic and international engineering and construction projects.
| Jul 25, 2012
Contract awarded for Gaillard Municipal Auditorium renovations in Charleston, S.C.
Seeking LEED Silver certification, the project will begin in August and is slated for completion in December 2014.
| Jul 25, 2012
KBE Building renovates UConn dining hall
Construction for McMahon Dining Hall will be completed in September 2012.
| Jul 24, 2012
Dragon Valley Retail at epicenter of Yongsan International Business District
Masterplanned by architect Daniel Libeskind, the Yongsan IBD encompasses ten city blocks and includes a collection of high-rise residences and commercial buildings.
| Jul 24, 2012
Military Housing firm announces expansion into student housing
The company has partnered with the military to build, renovate and manage nearly 21,000 homes with more than 65,000 bedrooms, situated on more than 10,000 acres of land nationwide.
| Jul 23, 2012
Giants 300 Firm Index 2012
An alphabetical index of the Giants 300 AEC firms and their ranking in specific categories.
| Jul 23, 2012
Missner Group completes construction of Chicago auto dealership
The Missner Group also incorporated numerous sustainable improvements to the property including the implementation of a vegetative roof, and the utilization of permeable pavers for the parking lot.
| Jul 20, 2012
2012 Giants 300 Special Report
Ranking the leading firms in Architecture, Engineering, and Construction.
| Jul 20, 2012
Data Centers Report: Demand ‘exploding’
BD+C's Giants 300 Top 25 AEC Firms in the Data Center sector.
| Jul 20, 2012
Office Report: Fitouts, renovations keep sector moving
BD+C's Giants 300 Top 25 AEC Firms in the Office sector.