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
| Apr 5, 2013
Bangkok gets a leaning tower, that may topple
A seven-story apartment tower under construction in Bangkok has started to tilt and is on the verge of toppling.
| Apr 5, 2013
Snøhetta design creates groundbreaking high-tech library for NCSU
The new Hunt Library at North Carolina State University, Raleigh, incorporates advanced building features, including a five-story robotic bookBot automatic retrieval system that holds 2 million volumes in reduced space.
| Apr 5, 2013
'My BIM journey' – 6 lessons from a BIM/VDC expert
Gensler's Jared Krieger offers important tips and advice for managing complex BIM/VDC-driven projects.
| Apr 3, 2013
AIA CES class: Sealant repairs that last – hybrid sealants for building restoration
It is hard to talk about restoration without talking about sustainability. This two-hour interactive online course discusses the role that restoration can and does play in the arena of sustainability, and specifically the role that sealants play in sustainable design and repair.
| Apr 3, 2013
5 award-winning modular buildings
The Modular Building Institute recently revealed the winners of its annual Awards of Distinction contest. There were 42 winners in all across six categories. Here are five projects that caught our eye.
| Apr 2, 2013
6 lobby design tips
If you do hotels, schools, student unions, office buildings, performing arts centers, transportation facilities, or any structure with a lobby, here are six principles from healthcare lobby design that make for happier users—and more satisfied owners.
| Apr 2, 2013
4 hospital lobbies provide a healthy perspective
A carefully considered entry zone can put patients at ease while sending a powerful branding message for your healthcare client. Our experts show how to do it through four project case studies.
| Apr 2, 2013
Green building consultant explores the truth about green building performance in new book
A new book from leading sustainability, green building author and expert Jerry Yudelson challenges assumptions about the value of sustainable design and environmentally-friendly buildings.
| Apr 1, 2013
Half of building owners use 'smart' technologies, says survey
A survey of 291 building owners by IDC Energy Insights shows that 50% of owners use smart building technologies, such as HVAC controls, lighting controls, and analytics/data management.