5004.2.2.6 Drainage system design.
FC § 5004.2.2.6
Drainage systems shall be in accordance with the Plumbing Code and the following requirements: 1. The slope of floors to drains in indoor locations, or similar protection in outdoor locations, shall not be less than 1 percent.
2.Drains from indoor storage areas shall be sized to carry the volume of the fire protection water as determined by the design density discharged from the fire extinguishing system over the minimum required system design area or area of the room or area in which the storage is located, whichever is smaller.
3.Drains from outdoor storage areas shall be sized to carry the volume of the fire flow and the volume of a 24-hour rainfall as determined by a 25-year storm.
4.Materials of construction for drainage systems shall be compatible with the materials stored.
5.Incompatible materials used in open systems shall be separated from each other in the drainage system.
6.Drains shall terminate in an approved location away from buildings, structures, valves, means of egress, fire access roadways, adjoining property and storm drains.
