In Group R-2 and R-3 occupancies, what is the maximum sphere diameter that can pass through guards on the open sides of stairs within individual units?

In Group R-2 and R-3 occupancies, ensuring the safety of occupants is a priority, particularly in terms of preventing falls from stairs. The diameter of a sphere that can pass through guards is critical for safety regulations. The correct maximum sphere diameter that can pass through guards on the open sides of stairs is 4-3/8 inches. This measurement is established to ensure that the openings in the guardrails do not allow small children or pets to fall through.

If the diameter were larger, it could potentially permit a larger object or even a small child to slip through, thus increasing the risk of accidents. The code specifications aim to balance safety with functionality, ensuring that guards remain effective in preventing falls while still allowing for practical use of the stairways and their design. By adhering to this specific measurement, buildings can mitigate hazards associated with fall protection on stairs.