When installing new guards at an exterior door landing, what is the minimum required height from the landing to the top of the guard if the landing is 40 inches above finished grade?

The minimum required height for guards at an exterior door landing that is 40 inches above finished grade is 36 inches. This height requirement is established to ensure safety by preventing falls from elevated surfaces. Building codes often stipulate guard heights based on the elevation of the structure to protect individuals from potential accidents.

In this context, since the landing is 40 inches above the ground, a guard height of 36 inches provides a reasonable and effective barrier while maintaining a comfortable and accessible design. This standard reflects an agreement among various codes and regulations, which typically emphasize that the height of guards should safely deter individuals from leaning over or falling over the edge.

Different heights from the landing to the top of the guard may not provide sufficient protection or could allow individuals to easily fall over the barrier, particularly from a significant drop such as 40 inches. Therefore, adherence to the 36-inch requirement is crucial in ensuring the safety and security of occupants.