Ā
Ā
Ā
Ā
Ā
Ā
Ā
Ā
Ā
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. Ā "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. Ā 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
Hotel Facilities | Jan 24, 2018
U.S. hotel markets with the largest construction pipelines
Dallas, Houston, and New York lead the way, with more than 460 hotel projects in the works.
Architects | Jan 24, 2018
Strong finish for architecture billings in 2017
The Architecture Billings Index concluded the year in positive terrain, with the December reading capping off three straight months of growth in design billings.
Big Data | Jan 5, 2018
In the age of data-driven design, has POEās time finally come?
At a time when research- and data-based methods are playing a larger role in architecture, there remains a surprisingly scant amount of post-occupancy research. But thatās starting to change.
Multifamily Housing | Jan 4, 2018
Shigeru Banās mass timber tower in Vancouver gets city approval
The 232-foot-tall Terrace House luxury condo development will be the tallest hybrid wood structure in North America.
Green | Dec 22, 2017
Green builders can use ābig dataā to make design decisions
More and more, green project teams are relying on publicly available āexternal datasetsā to prioritize sustainable design decisions, says sustainability consultant Adele Houghton.
Reconstruction & Renovation | Dec 21, 2017
Interactive map includes detailed information on historic New York City buildings
The New York City Landmarks Preservation Commission launched a new, enhanced version of its interactive map, Discover NYC Landmarks.
High-rise Construction | Dec 20, 2017
Another record year for high-rise construction
More than 140 skyscrapers were completed across the globe this year, including 15 supertall towers.
Game Changers | Dec 20, 2017
Urban farms can help plant seeds for citiesā growth around them
Urban farms have been impacting citiesā agribusinessāand, on some cases, their redevelopmentāfor decades.
Public Health Labs | Dec 19, 2017
10 takeaways from SmithGroupās ālab of the futureā initiative
The LAB2050 initiative digs into the scientific trends, technologies, and economics that will shape tomorrowās research laboratory environments.