For decades, it has been an axiom of construction: To reduce the danger from fire, a multifamily apartment building needs two stairwells. But a growing body of evidence is sparking a hot debate over ...

States and cities are revising building codes to allow single-stair multifamily buildings, aiming to increase affordable housing while maintaining safety standards. Minnesota’s recent study may guide ...

You might think stairways are just about getting from one floor to another. But they can be so much more. Apart from being architectural features, staircases can provide space for storage, display, ...