UpCodes logo
Go To Full Code Chapter
The fill depth (D) shall be not less than 1 foot (305 mm) for slowly permeable soils and permeable soils with high water tables and not less than 2 feet (610 mm) of fill shall be required for shallow permeable soils over bedrock. Additional fill shall be placed at the downslope end of the bed or trench where the site is not level so the bottom of the bed or trench is level. The downslope fill depth for bed systems shall be determined by the following equation:
(Equation 9-3)
For SI: 1 foot = 304.8 mm.
The downslope fill depth for trench systems shall be determined by the following equation:
(Equation 9-4)
For SI: 1 foot = 304.8 mm.

Related Code Sections

903.5.1 Mound Systems, Fill Depth
The fill depth (D) shall be not less than 1 foot (305 mm) for slowly permeable soils and permeable soils with high water tables and not less than 2 ...
903.5.1 Mound Systems, Fill Depth
The fill depth (D) shall be not less than 1 foot (305 mm) for slowly permeable soils and permeable soils with high water tables and not less than 2 ...
R506.2.1 Floors, Fill
approved, the fill depths shall not exceed 24 inches (610 mm) for clean sand or gravel and 8 inches (203 mm) for earth ...
R506.2.1 Floors, Fill
approved, the fill depths shall not exceed 24 inches (610 mm) for clean sand or gravel and 8 inches (203 mm) for earth ...