What is the minimum height required for guards, measured vertically from the adjacent walking surfaces?

The minimum height required for guards, which are typically installed to prevent falls from elevated surfaces, is established to ensure safety in commercial buildings. Guards must be at least 42 inches above the adjacent walking surfaces. This height is designed to effectively prevent individuals from falling over the edge, providing a suitable barrier that meets safety standards.

Guardrails at this height are specifically meant to accommodate a wide range of users, including both adults and children, ensuring that they are high enough to reduce the risk of accidental falls. The requirement also considers practical usage, as lower heights might not be effective in preventing safety hazards in environments where people are moving quickly or could potentially lean against the guard.

Options suggesting heights of 24 inches, 36 inches, or 56 inches do not align with standard safety practices as established by codes such as the International Building Code (IBC). The height of 42 inches strikes a balance between providing adequate safety while being practical for installation and use in various building scenarios.