Scope Final 2 Aug 2023.pdf

U.S. ARMY CORPS OF ENGINEERS, VICKSBURG DISTRICT

Security Fencing at the Red River Project Office 276 Miller Road, Bossier City, LA

1.0 General Scope of Work

Provide all labor, materials, and equipment to supply and install approximately 1,053 feet of new Type FE6-TR-72 chain link security fence plus gates as shown on attached drawings to fully enclose the Red River Project Office facility. Exact layout to be field verified with designated government representative. Fence fabric shall be a minimum of 7 feet high.

Overall fence height shall be 8 feet minimum including outriggers with 3 strands of barbed wire. Fencing to include one (1) 12-foot swing gate (single leaf) and one (1) 20-foot sliding cantilevered gate at locations shown on the plan. A powered operator shall be provided on the 20-foot sliding gate with a keypad access control system for operation of the gate.

Power supply for operator and control system will be installed per National Electrical Code, underground in new conduit including one spare conduit, from existing electrical panel inside the office building. Keypads shall be located on both the inside and outside of the sliding gate as shown on the plan. Additionally, the access control shall be operable by remote control and 8 remote controls shall be provided. The storage unit and metal carport sheds located in the back corner of the facility shall be rearranged to accommodate the new fencing as indicated. Approximately 346 feet of existing fencing in this area shall be removed and disposed of by the contractor. Two metal light poles with concrete bases shall also be removed from inside the new fenced in compound. Exact revised locations of the storage unit and sheds shall be verified and approved on site by the designated government representative. See the following specifications and attached drawings for additional information on the requirements.

2.0 Chain Link Fencing Fabric

Fencing fabric must be minimum 9-gage wire mesh and mesh openings must not be greater than 2-inches (51 mm) per side. Fence fabric material will be galvanized steel. The fencing fabric must be extended to within 2 inches (51 mm) of firm ground and anchored at the bottom using horizontal tension wires. Top of fabric shall be anchored using a horizontal top rail.

3.0 Fence Posts

Fencing fabric must be mounted on steel posts that are set in concrete with additional bracing at corners and gate openings, as necessary. Posts, bracing, and all other structural members must be placed on the secure side of the fencing fabric.

Posts must be vertical within plus or minus 2 degrees in each direction. Posts must be embedded and encased in concrete according to the design details enclosed. Post spacing shall be in accordance with the fence manufacturer’s recommendations, but in no case shall spacing between posts be more than 10 feet.

U.S. Army Corps of Engineers, Security Fence at Red River Project Office, Bossier City, LA, continued…

4.0 Fence Bracing

Steel truss rods used for bracing must have a minimum nominal diameter of 5/16 inch (8

mm) and provided with turnbuckles for tensioning. Provide bracing for each gate, terminal and end post. Install truss rods diagonally from near ground level of the gate, terminal or end post to within 6 inches (152 mm) from the top of the fabric at the adjacent line post.

Fencing fabric shall be securely fastened to rails and tension wires on the top and bottom with 9 gage (3.76 mm) galvanized tie wires (compatible with the fabric to inhibit corrosion) incorporating at least three full twists, 9 gage (3.76 mm) round wire galvanized hog rings, or in a manner that provides a tensile strength equal to or greater than the strength of the fencing fabric.

5.0 Fence Fabric Height

All security and perimeter fencing must have a minimum fence fabric height of 7 feet (2.13m), excluding the top guard. Fence height including outriggers must be a minimum of 8 feet (2.44m).

6.0 TOP GUARDS

Install outriggers (support arms) at 45-degree angles in a single arm (towards the threat side), constructed of a single outrigger consisting of 18-inch (457 mm) arm, each having three strands of barbed wire at regular intervals along the top of the fence.

The outriggers must provide a minimum of an additional 12 inches (305 mm) to the fence height. The top guard fencing adjoining gates may range from a vertical height of 18 inches (457 mm) to the normal 45-degree outward protection, but for a limited distance along the fence line to adequately open the gates. Outriggers must be permanently affixed to the fence posts with screws or by spot welding. Screws used to affix outriggers to posts must be made tamper-proof either by design, peening, or welding.

a. Outrigger/Barbed Wire Arms must be constructed of the same material as the other fencing components in accordance with ASTM F626.

b. Barbed wire is a fabricated wire product consisting of two line wires twisted to form a two-wire strand, into which 4–point barbs are tightly wrapped and locked into place at specific intervals. Fences requiring barbed wire must use a minimum of 3 strands of barbed wire equally spaced. Additional strands may be added as required. Barbed wire must consist of two 12.5 -gage /0.099-inch (2.5 mm) (+0. 005-inch (.127 mm)) twisted line wires with 15- gage /0.080- inch (2 mm)(+0, 005-inch (.127 mm)) round barbs. Barbed wire must be zinc-coated steel compatible with the other fencing materials. All barbs must consist of four points and spacing of barbs must be at 5- inch (127 mm) (+1- inch (25.4 mm)) centers.

U.S. Army Corps of Engineers, Security Fence at Red River Project Office, Bossier City, LA, continued…

7.0 Grounding

Grounding and bonding of the perimeter systems must be in accordance with the National Electric Safety Code (NESC) - IEEE C2.

a. The grounding connections must be made to a separate ground rod.

b. Fences must be grounded at each side of a gate or other opening.

c. Gates must be bonded to the grounding conductor, jumper, or fence.

d. A buried bonding jumper must be used to bond across a gate or other opening in the fence.

e. If barbed wire strands are used above the fence fabric, the barbed wire strands must be bonded to the grounding conductor, jumper, or fence.

f. The grounding conductor must be connected to the fence post or posts, as required, with suitable connecting means.

8.0 Single Cantilevered Gate

All single cantilevered sliding gates should use full support and suspension of gate frame by four rollers secured to two posts inside the restricted area. When an opened gate rests parallel to existing fence, a straight and level fence line at least 1.5 times the size of the opening should be made to accommodate when the gate is fully open. A 2 inch (51 mm) maximum clearance must be maintained between the bottom of fence and the road surface when gate is in closed position. See attached drawing for typical cantilevered gate design requirements. Gate shall be single leaf, 20 foot wide.

9.0 Swing Gates

All swing vehicular gates must be designed to swing inward, toward secured area. A 2 inch (51 mm) maximum clearance must be maintained between the bottom of fence and the road surface when gate is in closed position. See drawings for minimum post sizes and concrete foundations and typical design for swing gates. Gate shall be a single leaf, 12 foot wide.

10.0 Sliding Power Gate Operator

a. Locate gate operator to prevent tampering from outside the fence.

b. The gate operator shall be Commercial Duty, High Traffic rated with capacity sized to meet or exceed the actual gate installed.

c. Safety Sensors shall be provided to keep gate from closing on obstructions.

d. Gate shall provide for Remote Control operation with encrypted signals, with controller range capable of working from inside the building lobby.

e. Gate shall be programable to automatically close after vehicle passes or after time delay, with capability of overriding to hold gate open indefinitely.

f. Operator shall provide secure means for manual override for gate operation in the event of malfunction/failure.

g. Provide 2 keypad controls (one on each side of the gate) and 8 remote controls.

h. Operator shall include minimum Manufacturer’s 5-year commercial warranty.

U.S. Army Corps of Engineers, Security Fence at Red River Project Office, Bossier City, LA, continued…

11.0 Attached Drawings

a. Plan view showing layout of fence and location of storage unit and sheds

b. FE6 Chain Link Security Fence Details

c. FE6 Chain Link Security Fence Gate Details

d. Chain Link Cantilevered Gate Details

12.0 Point of Contact on Site

For prebid site visits and coordination during construction, please contact:

Rodney Nordby

Phone: 318-393-0199