Legionella is a type of Gram-negative bacteria that occurs naturally in freshwater environments. Although it is present in nature, Legionella becomes a substantial health concern when allowed to multiply in a building’s water systems. According to the U.S. Center for Disease Control (CDC), from 2000 through 2015, there were 49,930 confirmed Legionnaires’ cases in the United States. Legionnaires’ disease is a severe type of pneumonia that can rapidly become fatal. It is caused by breathing in aerosolized water droplets containing Legionella, with the majority of recognized Legionnaires’ disease cases occurring in hotels, resorts, cruise ships, and the healthcare setting.Read More [fa icon="long-arrow-right"]
The use of masonry cavity walls dates back over a hundred years and is still thriving today. However, the use of masonry in cavity walls has evolved to meet the performance needs and building specifications of 21st century buildings.Read More [fa icon="long-arrow-right"]
CCA, LLC. Welcomes Dr. Michael Mellette, Sc.D., CIH, CSP, CHMM, Senior Scientist Occupational and Environmental Health
CCA is excited to introduce Dr. Michael Mellette, Senior Scientist Occupational and Environmental Health. Mike has 15-plus years of experience in occupational safety and environmental compliance, industrial hygiene, exposure, and risk assessment. As an experienced former U.S. Army helicopter pilot with extensive education and experience in environmental, chemical exposures, industrial safety, Michael is a perfect fit for CCA’s disciplined, team-oriented approach. Michael will be responsible for leading cross-functional teams in investigations related to occupational and environmental health issues as well as safety investigations including accidents.
Michael's background includes:
The process of inspecting the façade or roof of a building is changing. Advances in programming and battery technology have made unmanned aerial vehicles or “drones” both viable and affordable. Engineering and architectural companies are incorporating these tools into the practice of inspecting the façade and roof of structures, surveying large landscapes, and monitoring construction progress. The drone can be used as a tool, in the aforementioned tasks, that can safely produce visual and or thermal data faster at less cost than using tradition means and methods.Read More [fa icon="long-arrow-right"]
The devil is in the details. One year following the completion of a building in the Mid-Western United States, the tile on the exterior had begun to loosen and fall. The tile was selected for commercial-outdoor use, and could withstand freeze-thaw, thermal-shock conditions, and were frost resistant. If the above was true, then what was causing the failure?Read More [fa icon="long-arrow-right"]
Even though women are making their voices heard, depending on the industry, the number of women in leadership positions is still low. Historically the construction industry has always been weighted heavily towards the male gender. In fact, only seven percent of all construction executives are women.Read More [fa icon="long-arrow-right"]
The decision to replace an existing roof may be the result of an ongoing issue such as water leakage, or proactively replacing it as part of building maintenance. Additional decisions need to be made regarding roof repairs or full replacement including whether or not to over-clad the existing roof or to completely replace it.Read More [fa icon="long-arrow-right"]
Property managers and owners should be ever mindful of and take steps to manage the risks of damage due to a water pipe which has burst due to freezing. More than 20 years ago, The Insurance Institute for Property Loss Reduction (IIPLR) estimated the cost of insured residential construction freeze-related losses exceeded $4 billion over the previous decade. A study conducted in the mid 1990’s (Gordon) noted that the risk of freeze damage was particularly high in the southern states where more mild winter temperatures prompt builders to employ building practices that are insufficient to protect water pipes from exposure to occasional sub-freezing temperatures. Furthermore, unsuspecting property owners may tend to pay less attention to potential damages that can result from water pipes that are only occasionally exposed to freezing temperatures. The IIPLR research work recommended establishing an outdoor temperature alert threshold of 20° F for the southern states. While property owners should be on high alert when outdoor temperatures drop into the low 20’s, the risk of freeze related pipe bursting still exists whenever outdoor temperatures remain significantly below freezing for extended time periods. This is especially true where there are uninsulated pipes directly exposed to outdoor temperatures or there are holes in the exterior shell of a building that allow the outdoor air to impinge directly upon a pipe within or near an exterior wall.
What can be done to reduce the risk of pipe freezing?Read More [fa icon="long-arrow-right"]
Different materials are used in the construction process to ensure the building envelope is air tight and water resistant. Components include water barriers, air barriers, and thermal control layers. While technologies for testing air and water barriers, along with thermal control have evolved over the years, there are still inconsistencies among the different practices used for testing.Read More [fa icon="long-arrow-right"]