What is the minimum slope required for the floor to the floor drain in a public restroom that sells food or drinks?

The minimum slope required for the floor leading to a floor drain in a public restroom that sells food or drinks is 1/8 inch per foot. This standard is crucial for ensuring proper drainage, minimizing the risk of standing water, and maintaining hygiene in food service areas.

A slope of 1/8 inch per foot provides an adequate gradient that encourages water to flow efficiently toward the drain, preventing potential health hazards associated with stagnant water, such as mold and bacterial growth. This requirement is established in plumbing codes and guidelines to ensure that facilities serving food and beverages maintain sanitary conditions.

Other options, while suggesting slopes that could facilitate drainage, are either insufficient (like 1/16 inch per foot which may not provide enough gravity flow) or too steep (like 1/4 inch per foot and 1/2 inch per foot), which could lead to issues such as difficulty in walking on the surface or contributing to structural stress over time. Therefore, the selected minimum slope of 1/8 inch per foot strikes an optimal balance between effective drainage and practicality in public restroom design.