Our long history and experience is that, in general, the failure rate for construction projects has remained high. Why haven't advances in project-management science, computer technology and communications been more effectively brought to bear in our business? What about the advertised beneficial impacts of 3D computer-aideddesign, computerized critical-path method schedules and building information modeling? Are today's engineers not as good as those who built yesterday's megaprojects—the Panama Canal, the Empire State Building or the Hoover Dam?
Owners, architects, engineers and contractors have been challenged to deliver capital projects on time and on budget because of their complexity and because of the inherent instability created by the contractual structure, which contains incentives and disincentives to proactively solve problems and seek to avoid blame.
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.