Materials Section - City of Xenia

17.0 Trench Material (Standard Drawing#100 and 101)
17.1 Pipe Bedding - All pipe shall have bedding including service lines. The pipe bedding shall
be as follows:
1. Water Main and Services - No. 8 washed gravel, 75% to 100% crushed, and shall be a
minimum of 4-inches under pipe to a minimum of 12-inches over pipe.
2. Sanitary Sewer Main and Laterals - No. 8 washed gravel, 75% to 100% crushed, and shall
be a minimum of 4-inches under pipe to a minimum of 12-inches over.
3. Storm Sewer - Shall be No. 57 washed gravel, a minimum of 4-inches under pipe to a
minimum of 6-inches over pipe. The remainder of the backfill in the right-of way to subbase
grade shall be the equivalent of ODOT ITEM 603 unless otherwise approved by the
City Engineer.
17.2 Gravel Backfill - Gravel backfill, where required, shall consist of durable particles graded
from fine to coarse. It shall conform to the ODOT ITEM 603, Grading A Specifications (Old
ODOT Item 310.02). It shall not contain lumps or frozen material. All such materials shall be
subject to approval by the City Engineer.
18.0 Concrete Encasement, Cradle (Standard Drawing #308)
18.1 Strength - The concrete used for encasement and cradle shall have a minimum 28 day
compressive strength of 4,000 psi.
18.2 Reinforcing Steel - The submitted construction drawings shall show the locations, lengths,
sizes, and numbers of reinforcing bars required. The reinforcing steel shall conform in all
respects to “Deformed Steel Bars,” A15 “Billet Steel Bars,” A16 “Rail Steel Bars,” and A160
“Axle Steel Bars,” ASTM Specifications A305.
19.0 Restoration
19.1 Topsoil - Imported topsoil shall meet the requirements of ODOT ITEM 653.02 Minimum of
- 6 inches deep.
19.2 Street General - The street restoration materials shall meet the following specifications:
19 February 2007