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
Data Centers | Feb 15, 2022
Data center boom: How two AEC firms plan to meet unprecedented demand for data center facilities
Ramboll's Jim Fox and EYP Mission Critical Facilities' Rick Einhorn discuss the recent joining of their companies at a time of unprecedented data center demand. BD+C's John Caulfield leads the discussion with Fox, Ramboll's Managing Director for the Americas, and Einhorn, EYP Mission Critical Facilities' Managing Director.
Resiliency | Feb 15, 2022
Design strategies for resilient buildings
LEO A DALY's National Director of Engineering Kim Cowman takes a building-level look at resilient design.
Products and Materials | Feb 14, 2022
How building owners and developers can get ahead of the next supply chain disaster
Global supply chain interruptions that started at the very beginning of the pandemic are still with us and compounding every step of the way. Below are a few proven tips on how to avert some of the costly fallout should we be faced with similar commercial disasters at any time in the future.
Urban Planning | Feb 11, 2022
6 ways to breathe life into mixed-use spaces
To activate mixed-use spaces and realize their fullest potential, project teams should aim to create a sense of community and pay homage to the local history.
Healthcare Facilities | Feb 10, 2022
Respite for the weary healthcare worker
The pandemic has shined a light on the severe occupational stress facing healthcare workers. Creating restorative hospital environments can ease their feelings of anxiety and burnout while improving their ability to care for patients.
Retail Centers | Jan 31, 2022
Amazon Style: Amazon’s latest innovative physical shopping experience
In January, Amazon unveiled plans to build a physical fashion store concept, dubbed Amazon Style, in Los Angeles. The e-commerce giant says the store will offer “together the best of shopping on Amazon–great prices, selection, and convenience–with an all new shopping experience built to inspire.”
Sponsored | BD+C University Course | Jan 30, 2022
Optimized steel deck design
This course provides an overview of structural steel deck design and the ways to improve building performance and to reduce total-project costs.
Laboratories | Jan 28, 2022
3 must-know strategies for developers in today’s life sciences industry
While the life sciences industry had been steadily growing, this growth exploded when the pandemic arrived—and there is no indication that this lightning-fast pace will slow down any time soon.
M/E/P Systems | Jan 27, 2022
Top 5 building HVAC system problems and how to fix them
When your HVAC system was new, it was designed to keep the indoor environment comfortable, functional, and safe. Over time, that system can drift out of alignment, leading to wasted resources, excessive energy consumption, and reduced occupant comfort.
Sponsored | Steel Buildings | Jan 25, 2022
Structural Game Changer: Winning solution for curved-wall gymnasium design