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Dezinci – What??? What Is Dezincification?

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Richard L. Ellsworth, P.E.

As a result of changes in the regulations and restrictions for potable water systems by the NSF Standard 61: Drinking Water System Components Health Effects, the use of lead in brass alloy fittings, faucets, and components was eliminated. It should be noted that lead was used in brass alloys to...

Unsealed Shingle Corners

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Kurt D. Mulder, P.E.

Wear and tear, it happens to everything as it ages, including roofing. During the examination of roofing, wear and tear need to be taken into account by the examiner for it can be mistaken for damage resulting from wind uplift. A common form of wear and tear observed to asphalt shingles is granular...

Equal Conveyance and Compensatory Storage

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Anthony P. Centurelli, P.E.

In 2018, a friend who owns a small strip mall asked me for assistance in dealing with a wetlands issue. A wetland/floodplain is located behind, and abuts, the strip mall property. The floodplain drains via an intermittent stream which runs along the side of the property and crosses beneath the road...

TPO Roofing Splits

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Kurt D. Mulder, P.E.

A sixteen-year-old thermoplastic roof installed on a factory roof in Southern Alabama was reported to have been damaged during a hailstorm. The thermoplastic roofing at the facility was manufactured in rolled sheets, which were installed in parallel overlapping rows. Visual examination of the...

Why Are My Windows Foggy?

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Charles E. Whitley, P.E.

For those who live in hot or cold environments, double pane windows are a great way to increase the energy efficiency of your home. Double pane windows consist of two panes of glass that have been sealed together in a frame, with a pane of glass on the interior and exterior surface of the window...

Don’t Get Rubbed the Wrong Way

The U.S. exports about 4 million bushels of grain a year, including wheat, rice, corn, soy and other commodities. Grain is typically transferred by rail from farming areas to shipping terminals located on the coast or major waterways. The grain is temporarily stored in silos at the grain terminal...

Earth, Wind, and Fire

The job of a forensic or investigative engineer can be fascinating. Each investigation brings its own set of challenges and, at times, gathering facts and background information can be one of the more difficult aspects of a case. In gathering our own observations, evaluations, and examinations of...

Large Tractor Fire

With loss investigations, the engineer/investigator will often encounter situations which can present safety challenges and even hazards. In some cases, such as machinery breakdown or fires, many potential hazards exist. The engineer must be aware of the situation; proper safety is critical to...

What Are Threaded Fasteners?

Jeffrey A. Groves, P.E.

Jeffrey A. Groves, P.E.

Threaded fasteners (e.g., bolts, nuts, screws) are so common that it is hard to imagine a world without them. Our society depends on them. Consider the lug nuts that keep the wheels attached to our vehicles while driving or the fasteners that hold together the structural steel members of the...

Why Do Aluminum to Copper Connections Fail?

Electrical connections between aluminum and copper wires present special hazards for property owners. Aluminum to copper connections may deteriorate over time if not installed in a proper manner. A deteriorated connection can lead to overheating, which can result in a fire. Why do aluminum to copper...

Learn If Your Home’s Foundation Is Built On Expansive Clay Soil

EDT

Do your doors stick and not open properly during the rainy season? Do you have cracks in the drywall that sometimes go away? Have you noticed foundation cracks around your house? One of the first steps toward finding the correct method of repair is determining the soil type around the foundation. It...