What is the minimum tread depth for stairs according to building practice regulations?

The minimum tread depth for stairs being 200 mm aligns with common building practice regulations aimed at ensuring safety and accessibility. A tread depth of 200 mm provides a sufficient surface area for individuals to place their foot securely, reducing the risk of slipping or tripping. This measurement is considered a standard that accommodates a range of foot sizes and helps to promote safe navigation of stairs.

Additionally, the specification reflects the need for stairs to be designed in a way that is comfortable for users, contributing to overall building safety standards. In various building codes, having a minimum tread depth of 200 mm ensures that the stairs are not too steep or narrow, which can pose hazards in emergency situations or for elderly users.