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
| Jun 11, 2018
Accelerate Live! talk: The smart jobsite — Predictive visual data analytics for proactive project controls
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), a trio of experts in predictive visual data analytics presents how design-build giant Clayco has leveraged this technology to achieve production efficiency on several construction sites.
| Jun 11, 2018
Accelerate Live! talk: ‘AEC can has Blockchains?’
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), HOK’s Greg Schleusner explores how the AEC industry could adapt the best ideas from other industries (banking, manufacturing, tech) to modernize inefficient design and construction processes.
| Jun 11, 2018
Accelerate Live! talk: How advanced digital fabrication techniques are driving design innovation
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), SOM’s Lucas Tryggestad and Kyle Vansice present the firm’s 3D-printed building project and explore how digital fabrication is pushing design innovation.
Libraries | Jun 1, 2018
New library offers a one-stop shop for what society is craving: hands-on learning
Beyond lending books and DVDs, the Elkridge (Md.) branch library loans household tools like ladders, wheelbarrows, and sewing machines.
| May 30, 2018
Accelerate Live! talk: Seven technologies that restore glory to the master builder
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), AEC technophile Rohit Arora outlines emerging innovations that are poised to transform how we design and build structures in the near future.
| May 30, 2018
Accelerate Live! talk: Why the AEC industry must adapt to the Internet of Things boom
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), building systems expert Jeff Carpenter explores established and emerging IoT applications for commercial and institutional buildings, and offers a technology roadmap for navigating the IoT landscape.
| May 30, 2018
Accelerate Live! talk: T3 mass timber office buildings
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), architect and mass timber design expert Steve Cavanaugh tells the story behind the nation’s newest—and largest—mass timber building: T3 in Minneapolis.
| May 30, 2018
Accelerate Live! talk: An AEC giant’s roadmap for integrating design, manufacturing, and construction
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), Skender CEO Mark Skender and Chief Design Officer Tim Swanson present the construction giant’s vision for creating a manufacturing-minded, vertically-integrated design-manufacturing-build business model.
| May 30, 2018
Accelerate Live! talk: From micro schools to tiny houses: What’s driving the downsizing economy?
In this 15-minute talk at BD+C’s Accelerate Live! conference (May 10, 2018, Chicago), micro-buildings design expert Aeron Hodges, AIA, explores the key drivers of the micro-buildings movement, and how the trend is spreading into a wide variety of building typologies.
Market Data | May 29, 2018
America’s fastest-growing cities: San Antonio, Phoenix lead population growth
San Antonio added 24,208 people between July 2016 and July 2017, according to U.S. Census Bureau data.