What is the maximum allowable height for stair risers in normal stairways?

• A. 9
• B. 8
• C. 7
• D. 6

Answer: (C)

The maximum allowable height for stair risers in normal stairways is 7 inches. This measurement is established in building codes to promote safety and comfort for users. A riser height of 7 inches strikes a balance between accessibility and functionality, allowing for easier navigation of stairs, especially for individuals with mobility issues or those carrying items.

When risers exceed this height, there is an increased risk of tripping or falling, as well as fatigue for those ascending or descending. Building codes often prioritize user safety by prescribing these limits, and by adhering to this maximum height, buildings can reduce hazards associated with stair use.

The other options suggest greater riser heights, which would not comply with the safety standards outlined in building codes. Adhering to the 7-inch limit helps ensure safe use of stairways in residential and commercial structures.