How many inches do stacked boxes need to be away from a sprinkler?

The requirement for stacked boxes to be positioned a certain distance away from a sprinkler is based on fire safety regulations, which are designed to ensure that sprinklers can operate effectively in the event of a fire. Maintaining an 18-inch clearance is crucial because it allows the water spray from the sprinkler to reach all areas of the room and minimizes the risk of obstructions that could hinder the sprinkler's effectiveness.

This 18-inch distance ensures that the water can spread out adequately over the area intended to be protected, preventing any materials or obstacles from interfering with the spray pattern. This distance is a standardized safety practice used in many facilities to comply with fire codes and to ensure the maximum efficiency of fire suppression systems.

Options suggesting smaller or larger distances do not align with these safety standards. Maintaining the correct distance not only complies with regulations but also enhances the safety of the environment by ensuring that all areas are sufficiently protected in case of a fire emergency.