PhillyInc

The Boeing Co. is celebrating the 40th anniversary of its jumbo-jet factory in Everett, Wash., which has been expanded over the years to become the “world’s largest building” by volume. How big is it? Its 472 million cubic feet can swallow 2,142 average-size homes, 3.32 billion 16-ounce soda bottles, 75 football fields, or 911 basketball courts. Built to produce the Boeing 747, it has 25,000 employees who now also build the 767, 777 and 787 airliners. Parts of some of those planes have been built in Boeing’s relatively diminutive plant in Ridley Park. -- Henry J. Holcomb