What is the minimum tread depth for winder treads in stairways not exceeding the clear width?

The minimum tread depth for winder treads in stairways not exceeding the clear width is set at 10 inches as a standard requirement to ensure safety and usability. Winder treads, which are used to allow stairways to change direction in a compact space, must provide enough depth to accommodate the footfall of users comfortably while also minimizing the risk of trips and accidents. The specified minimum of 10 inches helps to ensure that individuals can navigate the turn safely, as narrower treads could lead to instability or missteps.

In addition, building codes are established not only to promote safety but also to enhance accessibility. Meeting the minimum tread depth requirement is crucial for compliance with these codes, and it reflects a careful consideration of the dynamics involved in climbing and descending stairs, particularly those that direct users around a corner.

While there are options that suggest lesser treads, those values do not meet the safety standards outlined in most building codes. It is important for inspectors and builders to be aware of these parameters to ensure that stairways are constructed safely and effectively for everyday use.