A Shell station on a Huntsville, Alabama arterial. Four slender columns, a flat deck roughly 60 feet by 30 feet, fifteen feet of clearance, and a fascia band carrying the brand colors. It is one of the most repeated structural forms in North America, and… Read more
Skyscraper design was once governed almost entirely by strength — could the frame carry gravity, wind and seismic loads with adequate margin? For the new generation of ultra-slender “pencil towers,” the governing requirement has shifted to something more subtle: occupant comfort. A building can be… Read more
Image Credit What Solar Trackers Do A solar tracker is a motorized mounting system that rotates photovoltaic (PV) modules to follow the sun across the sky, keeping the panel surface more nearly perpendicular to the incoming sunlight than a fixed-tilt rack can. The payoff is… Read more
Introduction Nearly every utility-scale wind turbine built today has three blades. This was not inevitable. One-blade and two-blade machines were built and fielded in the 1980s and 1990s, and multi-blade rotors dominated the farm windmill era for a century. The three-blade configuration won a genuine… Read more
Structural Dynamics Series — Detroit Metropolitan Wayne County Airport (DTW), McNamara Terminal, Concourse A DTW McNamara Terminal, Concourse A. The exposed roof structure combines arched panels, downward flying struts, and lateral tie rods. Introduction The McNamara Terminal at Detroit Metropolitan Wayne County Airport opened on… Read more
Measuring the Eiffel Tower’s Natural Frequencies with a Smartphone | VibrationData VibrationData · Field MeasurementT. Irvine · Paris · 11 Jul 2026 Measuring the Eiffel Tower’s Natural Frequencies with a Smartphone Two short accelerometer records on the summit deck captured five of the tower’s first… Read more
Introduction In the predawn hours of June 29, 2026, a severe thunderstorm complex swept across central South Dakota. The South Dakota Mesonet station at Highmore, in Hyde County, recorded a straight-line wind gust of 131 mph (58.6 m/s) at about 6:15–6:25 a.m. local time. The… Read more
Two incidents at the same wind farm, seven weeks apart, tell a single engineering story that’s worth unpacking carefully. On February 2, 2026, an 80-meter Vestas turbine at the Yeongdeok wind farm in North Gyeongsang Province, South Korea, snapped roughly a third of the way… Read more