Did you see the Alternating Tread Staircase (ATS) video on our Dumb Home YouTube Channel? These stand-alone plans will help you design and build a set of stairs with the wider, shallower geometry shown in the mock-up in the second half of the video. Of course, you’ll have to adapt the design to suit your particular project, such as the floor-to-floor height and wall locations. The plan instructions walk you through the design process and provide super-detailed explanations so you understand why you are building what you’re building. You’ll get details for an optional hatch that functions like a conventional door to provide sound and temperature isolation.