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
| Sep 13, 2010
Conquering a Mountain of Construction Challenges
Brutal winter weather, shortages of materials, escalating costs, occasional visits from the local bear population-all these were joys this Building Team experienced working a new resort high up in the Sierra Nevada.
| Sep 13, 2010
Data Centers Keeping Energy, Security in Check
Power consumption for data centers doubled from 2000 and 2006, and it is anticipated to double again by 2011, making these mission-critical facilities the nation's largest commercial user of electric power. With major technology companies investing heavily in new data centers, it's no wonder Building Teams see these mission-critical facilities as a golden opportunity, and why they are working hard to keep energy costs at data centers in check.
| Sep 13, 2010
3D Prototyping Goes Low-cost
Today’s less costly 3D color printers are attracting the attention of AEC firms looking to rapidly prototype designs and communicate design intent to clients.
| Aug 11, 2010
Minneapolis Public Housing authority, Honeywell launch energy retrofit program
Minneapolis Public Housing Authority and Honeywell today announced a $33.6-million energy efficiency and facility renewal program that will help the housing authority improve its infrastructure, reduce its impact on the environment, and save more than $3.7 million in utility costs per year. Local contractors will also complete a majority of the work for the program, one of the largest of its kind for a public housing authority, helping boost the Twin Cities job market.
| Aug 11, 2010
Skanska Promotes Richard Kennedy to COO for NY/NJ Metro Area
Skanska USA Building Inc., headquartered in Parsippany, N.J., has announced that Richard Kennedy was promoted to Chief Operating Officer from his previous role as Senior Vice President – General Counsel. Kennedy’s promotion marks the latest addition to Skanska’s national leadership team.
| Aug 11, 2010
The New Yorker's David Owen: Why Manhattan is America's greenest community
David Owen is a staff writer at The New Yorker and the author of 14 books, most recently Green Metropolis: Why Living Smaller, Living Closer, and Driving Less Are the Keys to Sustainability, in which he argues that Manhattan is the greenest community in America. He graduated from Harvard and lives in Washington, Conn., where he chairs the town planning commission.
| Aug 11, 2010
Sustainable Buildings as Teaching Tools: 4 Strategies for Integrating Buildings into Experiential Learning
4 Strategies for Integrating Buildings into Experiential Learning
| Aug 11, 2010
Morphosis builds 'floating' house for Brad Pitt's Make It Right New Orleans foundation
Morphosis Architects, under the direction of renowned architect and UCLA professor Thom Mayne, has completed the first floating house permitted in the U.S. for Brad Pitt’s Make It Right Foundation in New Orleans.The FLOAT House is a new model for flood-safe, affordable, and sustainable housing that is designed to float securely with rising water levels.