604Manholes, Inlets, And Meter Vaults

Manholes, Inlets, And Meter Vaults

Description

604.01This work consists of the construction of manholes, inlets, and meter vaults per these

specifications, and in conformity with the lines and grades shown on the plans or established.

Materials

604.02Concrete for these structures shall meet the requirements of Section 601-Structural

Concrete.

Other materials shall meet the requirements specified in the following subsections:

Clay or Shale Brick 704.01 Concrete Brick 704.02 Concrete Masonry Blocks 704.03 Frames, Grates, Covers, and Steps 712.06 Grade Ring 712.05 Reinforcing Steel 709.01 Precast Concrete Units 712.05

Construction Requirements

604.03Excavation. Excavation shall be per the requirements of Section 206

604.04Manholes, Inlets, and Meter Vaults

shall conform to the requirements for the respective type. When specified, the outside face of structures shall be plastered with a 1/2-inch-thick cement-sand mortar coat. Unless otherwise provided, exposed surfaces of concrete and masonry shall be cured as defined in subsection 601.13. Pipe sections on the inside of manholes or inlets shall be treated as shown on the plans, or as directed, and shall project outside sufficiently for proper connection with the next pipe section. Masonry shall fit neatly and tightly around the pipe.

built into a manhole where future laterals are to be connected. These pipes shall be sealed at their outer ends and an invert shall be built into each manhole for such lateral connections. When a manhole is located in the pavement area, it shall not be constructed to final grade until the pavement has been completed.

remove sections of the present curb, gutter, or curb and gutter. All damage to sections to remain in place shall be repaired at the Contractor's expense. The top portion of inlets shall be constructed concurrently with the adjacent curb and gutter to ensure proper alignment of grades unless otherwise permitted in writing.

604.05

of the meter installed including regulatory devices or fittings required for the utility supplied. Provisions for grounding, ventilation, drainage, or other safety precautions shall be constructed as required. Meter vaults may be cast-in-place or precast and shall conform to the rules and regulations for the utility service supplied in the vault.

immersion or in a manner satisfactory to the Engineer. Special care shall be taken to make the face of the brickwork smooth. All joints on the interior surface of the manholes and appurtenances shall be carefully struck.

Brick shall not be laid upon a concrete foundation until the concrete has set.

604.05Backfilling. Unless otherwise directed, all excavations shall be backfilled

immediately after the structures are built. Backfilling shall conform with Section 206 and as shown on the plans. Resurfacing. Excavations in existing streets, except streets that are to be closed or abandoned, shall be resurfaced as soon as practicable with the type and thickness of bases and pavement shown on the plans or as designated.

Cleaning. The structures and all appurtenances shall be thoroughly cleaned before final acceptance of the work.

When the new facilities interfere with the existing flow of sewage, the Contractor shall provide satisfactory bypass facilities at the Contractor’s expense.

Method of Measurement

604.06Manholes and inlets will be measured by the complete unit including ring and cover

or grating and frame. Manhole ring and cover used separately will be measured by the unit.

Inlet grating and frame used separately will be measured by the unit.

Manhole and inlet depth, "H," will be measured as shown on the plans. Measured depth and pay depth of manholes and inlets shall conform to the following:

Table 604-1 Measured Depth and Pay Depth of Manholes and Inlets Measured Depth Pay Depth 0.0 to 5.0 feet 5 feet 5.1 to 10.0 feet 10 feet 10.1 to 15.0 feet 15 feet (Continued thus)

Meter vaults will be measured by the complete unit including ring and cover.

604.07

Structure excavation and structure backfill for manholes, inlets, and meter vaults will not be measured and paid for separately but shall be included in the work.

Basis of Payment

604.07The accepted quantities will be paid for at the contract unit price for each of the pay

items listed below that appear in the bid schedule. Except as otherwise indicated on the plans or in the special provisions, all connecting devices will not be measured and paid for separately but shall be included in the work. Payment will be made under:

Pay Item Pay Unit Meter Vault Each Manhole ______ (____) Each Inlet, Type ______ (_____Foot) Each Manhole Ring and Cover Each ___ Inlet Grating and Frame Each

604.07

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605.01