Treadle Staircase Design

Quick answer：

A treadle staircase is a unique type of staircase where the steps are designed with a treadle mechanism, allowing the user to step on the treadle to move the steps forward or backward. This design is often found in historical buildings or in certain modern installations where a different approach to stair travel is desired. The design considerations include ensuring safety, ease of use, and integration with the overall architectural scheme.