Owners of heavy-duty trucks, such as Class 8 dump trucks, concrete mixers and tractor trailers, report increasing quality problems due to the latest round of clean-diesel regulations, according to a study from J.D. Power and Associates released late last month.
Trucks that are one year old decreased in quality from the previous model year, says J.D. Power, which, like ENR, is a unit of the McGraw-Hill Cos. Problems rose 9% and are mostly related to engine and fuel components designed to reduce tailpipe emissions under U.S. Environmental Protection Agency rules.
Because it can moderate the damaging effects of earthquakes, base-isolation is a technique used primarily in seismically active regions. ENR takes a look at some of the largest applications of base-isolation technologies in the world.