Stair riser heights must be 4 inches minimum and ____ inches maximum.

Stair riser heights play a crucial role in ensuring safety and accessibility in construction. The maximum height of 7 inches for stair risers reflects design standards that aim to promote ease of use while minimizing the risk of trips and falls.

A maximum riser height of 7 inches is widely recognized in various building codes, including the International Building Code (IBC). This height ensures that stairs are not overly steep, making them safer for individuals, especially those with mobility challenges or those carrying items. A consistent riser height, combined with the minimum height of 4 inches, provides a comfortable and safe experience when navigating stairs.

As for the other options, higher maximum heights would lead to steeper stairs, which could increase hazards and reduce accessibility. Standards are designed to prevent variations that might lead to uneven step heights, further contributing to safety and usability. This is why 7 inches is the accepted maximum measurement in many commercial applications.