32 31 13.54.pdf

Pajaro River Flood Risk Management Project Reach 6 Contract No: W912P725BA012

SECTION 32 31 13.54

BURIED CHAIN-LINK FENCE FOR RODENT CONTROL

05/25

PART 1 GENERAL

1.1 DESCRIPTION

This section specifies the materials and installation requirements for a buried chain-link fence to prevent rodent burrowing along levee slopes.

The barrier shall be installed by trenching and embedding the chain-link fabric to a specified depth with an outward horizontal extension

1.2 RELATED REQUIREMENTS

Section 35 41 00 LEVEE CONSTRUCTION.

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A392 (R 2022a) Standard Specification for Zinc-Coated Steel Chain-Link Fence Fabric

U.S. ARMY CORPS OF ENGINEERS (USACE)

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation.

Submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. "SPN" - San Francisco District. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Installation Details

SD-03 Product Data

Chain Link Mesh Fabric

Zinc Coating

Fasteners/Hog Rings

SD-07 Certificates

Certificates of Compliance

Final Submittal SECTION 32 31 13.54 Page 1 Issued for Construction July 2025

1.5 QUALITY CONTROL

Submit certificates of compliance in accordance with the applicable reference standards and descriptions of this section for the following:

a. Zinc Coating

b. Chain Link Mesh Fabric

c. Fasteners/Hog Rings

Work shall be performed under the supervision of a qualified contractor experienced in chain-link fence installation. Inspections shall be conducted at key installation phases, including trenching, material placement, and backfilling.

1.6 DELIVERY, STORAGE, AND HANDLING

Deliver materials to site in an undamaged condition. Store materials off the ground to provide protection against oxidation caused by ground contact.

PART 2 PRODUCTS

2.1 CHAIN LINK FENCE MATERIALS

Chain link mesh fabric shall be 1 inch mesh size (the measured distance between two parallel sides), 9 gauge wire. The chain link mesh fabric shall consist of steel wires woven together to form a diamond-patterned mesh. The chain link fabric mesh shall be manufactured from the highest quality galvanized wire. In accordance with ASTM A392-Class 1. The fabric shall be stretched taut and free of sag. The end of the mesh fabric shall be closed look for each roll without any open-ended wires.

2.2 FASTENERS/HOG RINGS

Hog rings shall be galvanized steel, minimum 9 gauge, and placed per manufacturer's and specification requirements. Tension wire shal be 7 gauge galvanized steel and attached along connections.

2.3 BACKFILL MATERIAL

Backfill material shall meet the requirements of select fill as outlined in Section 35 41 00 LEVEE CONSTRUCTION.

PART 3 EXECUTION

3.1 PREPARATION

Verify the levee embankment has been constructed to the lines, grades, and cross sections indicated on the drawings.

3.2 EXCAVATION AND TRENCHING

Excavate a trench at the toe of the levee slope as shown on the drawings.

3.3 INSTALLATION DETAILS OF CHAIN LINK MESH FABRIC

Chain link mesh fabric shall conform to the surface of the levee with a

Final Submittal SECTION 32 31 13.54 Page 2 Issued for Construction maximum gap of 1/4 inch . Tie adjacent rolls or panels with hog rings with no bumps along the joints at the spacing shown on the drawings. Secure the mesh to the slope using stakes or rebar pins to meet the minimum gap requirement from the levee slope to mesh .

3.4 BACKFILL AND COMPACTION

Backfill and compact anchor trenches with select fill as outlined in Section 35 41 00 LEVEE CONSTRUCTION. Chain link mesh fabric. Backfill chain link fabric mesh on waterside slopes with rock slope protection as outlined on the drawings and as outlined in Section 35 31 19 ROCK SLOPE PROTECTION. Backfill chain link fabric mesh on landside slopes and slopes not designated for rock slope protection with select fill as outlined on the drawings and as outlined in Section 35 41 00 LEVEE CONSTRUCTION.

3.5 QUALITY CONTROL

Inspect the chain link mesh fabric for gaps, unsecure sections or loose backfill. Submit a final as-built drawing reflecting the installed barrier location and depth

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Final Submittal SECTION 32 31 13.54 Page 3 Issued for Construction