The building of the Wilshire Grand Tower in Los Angeles substituted a quarter of the cement with coal fly ash, which increases the durability of concrete while reducing carbon dioxide emissions. The tower's foundation is in the Guinness Book of Records for the largest continuous concrete pour.
Los Angeles Tallest Tower: Wilshire Grand A new skyscraper has been rising in the past two months that, when finished in 2017, will be the tallest building west of the Mississippi. The 73-story Wilshire Grand office-hotel complex in downtown Los Angeles features the latest in fire and earthquake safety. It’s the first in a series of planned high-rises downtown after years of almost no building. Here are some key features. Jeff Goertzen's graphic shows the key architectural features.