Fast Company reports on a Chicago company that is betting big on modular apartment construction. Just beyond the snowy streets and neatly packed three-flats of Chicago’s southwest side, the factory at 3348 South Pulaski appears like a low gray monolith, spanning nearly 10 normal blocks and serving as a boundary between the residential neighborhood and the city’s industrial freight hub. Inside, the Chicago general contractor Skender is setting up what amounts to an apartment factory: An assembly line that will crank into gear in the spring, producing standardized apartment units ready to be bolted into a steel-framed stack on a...