A pan shall be provided for all floor drains when it is installed where?

A pan must be provided for all floor drains that are installed in locations where there is a higher risk of overflow or backup, especially in buildings that can experience significant foot traffic, such as an office building. When floor drains are located on the second floor of a new office building, the potential for overflow due to backed-up water can have serious consequences for the infrastructure below. The presence of a pan serves as a preventive measure, collecting any excess water and directing it safely, thereby protecting the building's structural integrity and the surrounding areas.

In contrast, while other locations may still require proper drainage solutions, they may not carry the same risk level as a second-floor office environment, which is typically used for various activities that could lead to an increased chance of water exposure and should have adequate provisions in place to handle water discharge effectively.