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What is the minimum height for a stair riser?

  1. 3 inches

  2. 4 inches

  3. 5 inches

  4. 6 inches

The correct answer is: 4 inches

The minimum height for a stair riser is typically set at 4 inches. This guideline is based on building codes aimed at ensuring safety and usability. A riser height of 4 inches strikes a balance between being low enough to provide ease of use for individuals, including those who may have mobility challenges, and high enough to prevent overly shallow steps that could pose a tripping hazard. Additionally, standardized riser heights contribute to consistent stair design, allowing users to develop a rhythm when ascending or descending stairs, which further enhances safety. In many building codes, including those relevant to residential construction in Florida, this minimum height helps create a predictable and safe stair environment. Riser heights below 4 inches could compromise safety, while those exceeding recommended heights may make stairs difficult to navigate.