SECTION 02720 PAV 2008.doc

SECTION 02720

STORM SEWER, CATCH BASIN, ROAD INLET REPAIR AND REPLACEMENT

1. APPLICABLE PUBLICATIONS: The following publications of the issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by the references thereto:

1.1 FEDERAL SPECIFICATIONS: (Fed. Spec.)

RR-F-621B Frames, Covers Gratings Sump and Catch

Basins, Manholes.

SS-C-1929 Cement Portland

& Int Am-3

1.2 AMERICAN SOCIETY FOR TESTING AND MATERIALS ASTM

PUBLICATIONS:

C 32 Sewer and Manholes Buck(made from clay or

Shale)

C139

Concrete Masonry Units for Construction of Catch Basins and Manholes

C270

Mortar for Unit Masonry

1.3

NEW JERSEY STATE HIGHWAY DEPARTMENT (NJSHD):

Standard Specification for Road & Bridge Construction

(1996 with Supplements)

2. MATERIALS:

2.1 Brick: Brick shall conform to ASTM C32-73.

2.2 Concrete Masonry Units: Concrete masonry units shall conform to ASTM C 139.

2.3 Mortar: Mortar for jointing and plastering shall consist of one part of Portland cement and two parts fine sand conforming to ASTM C

270.

2.4 Frame, Covers and Grates: Frames covers, and grates shall conform to Fed. Spec RR-F-621.

3.1 Replacement of Brick: Deteriorated brick from catch basins, manholes, and road inlets shall be removed and replaced with new brick. The joints shall be filled completely and shall be smooth and free from surplus mortar on the inside of the structure.

3.2 Replacement of Concrete Block: Deteriorated concrete block, from catch basins, manholes and road inlets shall be removed and replaced with new concrete block. The joints shall be filled completely and shall be smooth and free from surplus mortar.

3.3 Plaster: Interior Wall Surfaces: Remove all deteriorated mortar, spalled brick and slime. Plaster the wall surfaces with 1/2" thick mortar conforming to ASTM C 270.

3.4 Replacement of Broken or Damaged Catch Basin Curb Inlet, Road Inlet or Manhole Frame and Grates: Damaged frames and grates shall be removed and replaced with a new frame and grate of the same size as the frame and grate removed. Installation of frames and grates shall conform to N. J. State Highway Department Standards.

3.5 Raising of Existing Catch Basins, Manholes, Valve Boxes and Road Inlets: Existing items annotated shall be raised to new or existing pavement surface in accordance with New Jersey Department Standards. Catch basins raised above top of curb shall have an expansion joint with concrete feathered back one foot both sides of catch basin to curb see Appendix H.

3.6 Removal and Replacement of Catch Basins: The existing catch basin shall be removed completely. Cracked, deteriorated or broken drainage pipe within 3' of the catch basin shall be repaired or replaced. A new catch basin shall be constructed to the dimensions as the existing catch basin. The catch basin bottom shall be poured concrete a minimum of 6" thick, either poured in place or pre-cast. The catch basin walls shall be constructed of concrete block as specified in ASTM C139. All joints shall be filled completely and shall be smooth and free from surplus mortar. The existing or new frame and grate, whichever is specified, shall be set and capped in place flush with the pavement surface. The interior and exterior walls shall be plastered with a 1/2" thick mortar coat, the basin bottom shall be bermed with mortar and sloped to the exit pipe. The area around the catch basin shall be back-filled, compacted and the pavement structure replaced to match the surrounding pavement structure. See Appendix I for typical catch basin detail.

3.7 Removal and Replacement of Existing Concrete Top to Curb Type Catch Basin: The existing concrete top shall be removed completely without damage to adjacent curbs. Curbs damaged during removal shall be replaced back to the nearest construction joint. A new 4" thick concrete top shall be poured to a finished height level with the top of the new existing curb. The face of the new top shall be finished to match the shape of the adjacent curb. Forming shall be constructed of adequate material for a uniform thickness and a 1/8" slope toward the gutter. All forming shall be removed after the new top has properly cured.

4. METHOD OF MEASUREMENT AND PAYMENT•: All measurements shall be in units as identified in the appropriate SLINS in the Unit Price Schedule. Measurements for preparing payments shall be taken jointly with the Government Representative. Payment for these items shall constitute full compensation for completed work including all labor and incidentals necessary to accomplish the work required by this section of the specifications.

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