Most commonly associated with ensuring proper grading and paving of airport runways and highway projects, 3D control systems often come with a hefty price tag. Faced with the considerable startup costs, many contractors will forgo 3D grade and paving controls unless they are called for in a contract. But a Minnesota-based paving subcontractor found it to be the right solution for the pavement mat beneath the field of the new Vikings Stadium in Minneapolis.
“This was the first time we had ever used a 3D paving system,” says Shawn Bloch, GPS survey manager with Minneapolis-based Park Construction Co., which graded and paved the interior of Vikings Stadium. “It was also the first time it had ever been used in Minnesota, and I think the first time it’s been used to pave the inside of a football stadium.”
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.