Â
Â
Â
Â
Â
Â
Â
Â
Â
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. Â "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. Â 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
AEC Innovators | Mar 3, 2023
Meet BD+C's 2023 AEC Innovators
More than ever, AEC firms and their suppliers are wedding innovation with corporate responsibility. How they are addressing climate change usually gets the headlines. But as the following articles in our AEC Innovators package chronicle, companies are attempting to make an impact as well on the integrity of their supply chains, the reduction of construction waste, and answering calls for more affordable housing and homeless shelters. As often as not, these companies are partnering with municipalities and nonprofit interest groups to help guide their production.
Modular Building | Mar 3, 2023
Pallet Shelter is fighting homelessness, one person and modular pod at a time
Everett, Wash.-based Pallet Inc. helped the City of Burlington, Vt., turn a municipal parking lot into an emergency shelter community, complete with 30 modular “sleeping cabins” for the homeless.
Codes | Mar 2, 2023
Biden Administration’s proposed building materials rules increase domestic requirements
The Biden Administration’s proposal on building materials rules used on federal construction and federally funded state and local buildings would significantly boost the made-in-America mandate. In the past, products could qualify as domestically made if at least 55% of the value of their components were from the U.S.Â
Industry Research | Mar 2, 2023
Watch: Findings from Gensler's latest workplace survey of 2,000 office workers
Gensler's Janet Pogue McLaurin discusses the findings in the firm's 2022 Workplace Survey, based on responses from more than 2,000 workers in 10 industry sectors.Â
AEC Innovators | Mar 2, 2023
Turner Construction extends its ESG commitment to thwarting forced labor in its supply chain
Turner Construction joins a growing AEC industry movement, inspired by the Design for Freedom initiative, to eliminate forced labor and child labor from the production and distribution of building products.Â
Multifamily Housing | Mar 1, 2023
Multifamily construction startup Cassette takes a different approach to modular building
Prefabricated modular design and construction have made notable inroads into such sectors as industrial, residential, hospitality and, more recently, office and healthcare. But Dafna Kaplan thinks that what’s held back the modular building industry from even greater market penetration has been suppliers’ insistence that they do everything: design, manufacture, logistics, land prep, assembly, even onsite construction. Kaplan is CEO and Founder of Cassette, a Los Angeles-based modular building startup.
AEC Innovators | Feb 28, 2023
Meet the 'urban miner' who is rethinking how we deconstruct and reuse buildings
New Horizon Urban Mining, a demolition firm in the Netherlands, has hitched its business model to construction materials recycling. It's plan: deconstruct buildings and infrastructure and sell the building products for reuse in new construction. New Horizon and its Founder Michel Baars have been named 2023 AEC Innovators by Building Design+Construction editors.
Seismic Design | Feb 27, 2023
Turkey earthquakes provide lessons for California
Two recent deadly earthquakes in Turkey and Syria offer lessons regarding construction practices and codes for California. Lax building standards were blamed for much of the devastation, including well over 35,000 dead and countless building collapses.
Sports and Recreational Facilities | Feb 27, 2023
New 20,000-seat soccer stadium will anchor neighborhood development in Indianapolis
A new 20,000-seat soccer stadium for United Soccer League’s Indy Eleven will be the centerpiece of a major neighborhood development in Indianapolis. The development will transform the southwest quadrant of downtown Indianapolis by adding more than 600 apartments, 205,000 sf of office space, 197,000 sf for retail space and restaurants, parking garages, a hotel, and public plazas with green space.
Libraries | Feb 26, 2023
A $17 million public library in California replaces one that was damaged in a 2010 earthquake
California’s El Centro community, about two hours east of San Diego, recently opened a new $17 million public library. With design by Ferguson Pape Baldwin Architects and engineering services by Latitude 33 Planning & Engineering, the 19,811-sf building replaces the previous library, which was built in the early 1900s, damaged by a 7.2 earthquake that struck Baja California in 2010, and demolished in 2016.