What is the minimum riser height for all new construction exit stairs?

The minimum riser height for all new construction exit stairs is specified to ensure safety and uniformity in stair design. A riser height of 100 mm (or approximately 4 inches) is considered the minimum acceptable limit in many building codes. This measurement helps provide a balance between ease of use and safety, ensuring that stairs are accessible without being overly steep or easy to trip over.

While some building regulations may allow for slight variations, the 100 mm height is widely recognized as a standard to prevent hazards associated with overly tall or short risers, which can lead to falls or difficulties in navigating the stairs, especially in emergency situations where quick exit is necessary.

Understanding this standard is crucial for compliance with building codes and to create safe and functional stairways in new constructions.