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 ...

You probably give little thought to why the stairs in your home are built the way they are. I’m talking about how high you need to lift your foot to get up to the next step and how deep the flat tread ...

DEAR TIM: I have to build a simple set of steps but I’m totally lost. I don’t understand how to calculate what the distance should be for the risers and the treads. Everything about building steps ...