Seventeen tower cranes are in the process of lifting and placing 33,000 tons of massive steel trusses for the $1 billion, 1.3-million-square-foot Boeing 777X wing plant, according to the Puget Sound Business Journal.
The project features two open spans, one 460 feet across and the other 420 feet across, that run the 1,200-foot length of the building. To support these spans, and the roof and possible snow load, the engineers have designed colossal trusses, 45 feet deep, built of heavy steel girders.
— The Business Journal (@PSBJ) June 15, 2015
The project is being built by 17 cranes, two of them so big it took 55 large trucks to transport the sections to the job site in Everett, Wash.
Currently, about 1,000 people are working on the project, that number will rise to nearly 1,500 as completion nears. Some workers will be on 45-foot aerial work platforms to work on the ceilings.