Wildlife Fence v2.docx

F-164 Wildlife Exclusion Fence

DESCRIPTION

164-1.1 This item covers the requirements for furnishing materials and constructing approximately 3,200 linear feet of new 10’ tall chain link wildlife exclusion fences and gates with metal posts; furnishing and installing a two-foot deep concrete wildlife exclusion skirt/footer underground along the wire fence line and gates; and constructing fence gates in accordance with the details included here. The fence to be erected shall be 10’ tall chain-link fencing topped by three strands of barbed wire and shall include two 12-foot double swing gates and two approximately 50’ wide wildlife exclusion ditch crossings. There are no wood posts allowed. Any reference to wood posts in this specification is in error.

MATERIALS

164-2.0 Wire.

a. Woven wire (zinc-coated). Woven wire is not required. Chain link is required.

b. Chain-Link fence Fabric. The fabric shall be woven with a 9-gauge galvanized steel wire and shall meet the requirements of ASTM A392, Class 2 or zinc-5% aluminum mischmetal wire in a 2-inch (50 mm) mesh and shall meet the requirements of ASTM F1345, Class 2.

c. This section not used.

d. Barbed wire (zinc-coated). Zinc-coated barbed wire shall be 2-strand twisted No. 12-1/2 gauge galvanized steel wire with 4-point barbs of No. 14 gauge galvanized steel wire. All wire shall conform to ASTM Al 21 , Type A. The barbs shall be spaced approximately 5 inches (125 mm) apart.

e. Wire ties and tension wires. Wire fabric ties, wire ties, and tension wire for a given type of fabric shall be the same material as the fabric type. The tension wire shall be 7-gauge coiled spring wire coated similarly to the respective wire fabric being used. The fabric shall be attached to the tension wire not greater than every four feet. Wire fabric ties shall be hog rings of galvanized steel wire not less than 9-gauge. All material shall conform to Federal Specification RR-F-191/4.

f. Bracing wire (zinc-coated). Wire used for cable for bracing shall be No. 9 smooth galvanized soft wire.

164-2.1 Gates and hardware. Gates shall be constructed of galvanized steel tubing conforming to Federal Specification RR-F-191. Heavily galvanized hinges and latches for posts shall be furnished with each gate. A bolt hinge shall be used, and either a wing or butterfly latch shall be furnished. The fabric shall be the same as required for the fence, F-164-2.0.

164-2.2 Miscellaneous fittings and hardware. Miscellaneous steel fittings and hardware for use with zinc-coated steel fabric shall be of commercial grade steel or better quality, wrought or cast as appropriate to the fitting or hardware, and sufficient in strength to provide a balanced design when used with fabric, posts, and wires of the specified quality. All steel fittings and hardware shall be protected with a zinc coating applied in conformance with ASTM Al 53.

164-2.4 Braces. Cleats, gate stops, and braces shall be of adequate size. Gate stops shall be made of posts of suitable length. Braces may be made of posts of suitable length. All cleats, gate stops, and any

F-164-1 braces in contact with the ground and for a distance of at least 6 inches (150 mm) above the ground shall be treated by the hot and cold bath process, specified herein for posts. The wire used in cable for bracing shall conform to paragraph 164-2.0f.

164-2.5 Steel posts, rails, and braces. Line posts, rails, and braces shall conform to the requirements of ASTM F1043 or ASTM F1083 as follows:

Galvanized tubular steel pipe shall conform to the requirements of Group IA, (Schedule 40) coatings conforming to Type A, or Group IC (High Strength Pipe), External coating Type B, and internal coating Type B or D.

Roll Formed Steel Shapes (C-Sections) shall conform to the requirements of Group IIA, and be galvanized in accordance with the requirements of ASTM FI 043, Type A.

Posts, rails, and braces, with the exception of galvanized steel conforming to ASTM FI 043 or ASTM Fl 083, Group IA, Type A, or aluminum alloy, shall demonstrate the ability to withstand testing in salt spray in accordance with ASTM Bl 17 as follows:

· External: 1 ,000 hours with a maximum of 5% red rust.

· Internal: 650 hours with a maximum of 5% red rust.

The dimensions of the posts, rails, and braces shall be in accordance with Tables I through VI of Federal Specification RR-F-191/3.

164-2.6 Staples. The staples shall be No. 9 galvanized steel wire, one inch (25 mm) long for hardwood posts and 1-1/2 inch (38 mm) long for use in softwood posts.

164-2.7 Concrete pads at gates. Not required. Concrete shall be of a commercial grade with a minimum 28-day compressive strength of 3000 psi (2670 kPa).

164-2.8 Weed control material. A commercially available weed control material shall be applied at the manufacturer's recommended rate.

CONSTRUCTION METHODS

164-3.1 General. The fence shall be constructed using new materials. All work shall be performed in a workmanlike manner, satisfactory to the owner. The Contractor shall layout the fence line based on coordination with the owner. The Contractor shall span the opening below the fence with barbed wire at all locations where it is not practical to conform the fence to the general contour of the ground surface because of natural or manmade features such as drainage ditches. The new fence shall be permanently tied to the terminals of existing fences whenever required by the owner. The finished fence shall be plumb, taut, true to line and ground contour, and complete in every detail. As directed by the owner, the Contractor shall stake down the woven wire fence at several points between posts.

164-3.2 Clearing fence line. The site of the fence shall be sufficiently clear of obstructions, and surface irregularities. The fence line shall be graded so that the fence will conform to the general contour of the ground. The fence line shall be cleared on each side of the centerline of the fence. This clearing shall consist of the removal of all stumps, brush, rocks, trees, or other obstructions that will interfere with proper construction of the fence. Stumps within the cleared area of the fence line shall be grubbed or excavated except for the ditch crossings which shall be coordinated with owner. The bottom of the fence shall be placed a uniform distance above ground.

F-164-2 All holes remaining after post and stump removal shall be refilled with suitable soil, gravel, or other suitable material and shall be compacted with tampers.

The work shall include the handling and disposal of all material cleared, of excess excavation and the removal of spoiled material regardless of the type, character, composition, or condition of such material encountered.

164-3.3 Setting posts. Steel posts shall be spaced at 10’ intervals. If not attached or within the concrete footer, corner, brace, anchor, end, and gate posts shall be set in concrete bases. The top of the base concrete shall be slightly above the ground surface, trowel finished, and sloped to drain. Post holes of full depth and size for the concrete bases for posts shall be provided. All line posts may be either driven or set in dug holes to a penetration depth of 3 feet (90 cm). All post setting shall be done carefully and to true alignment. Dirt removed for placing posts, anchor bars, flanges, etc., shall be replaced, tamped, and leveled. When posts are driven, care shall be exercised to prevent marring or buckling of the posts. Damaged posts shall be replaced at the Contractor's expense. After posts are placed and lined, the holes shall be backfilled with concrete. The posts adjacent to end, corner, anchor, and gate posts shall be set and braced with braces and wire. No extra compensation shall be made for rock excavation.

164-3.4 Anchoring and bracing. Corner, end, gate, and adjacent intermediate posts shall be anchored and braced. Anchor posts shall be set at approximately 500 feet (150 m) intervals and braced to the adjacent posts. Posts shall be braced before the wire fencing is placed.

164-3.5 Installing wire. The wire shall be placed on the side of the posts away from the airport. The wire fence shall be placed on the posts. Longitudinal wires shall be installed parallel and drawn uniformly taut. The vertical stay wires of the woven wire fencing shall be straight and vertical. At end and gate posts the woven wire and barbed wire shall be wrapped once around the post; The bottom wire of the wire fencing shall clear the ground by not more than 2 inches (50 mm) or less than one inch (25 mm) at any place.

164-3.6 Splicing wire. Wire splices in longitudinal wires will be permitted if made with an approved galvanized bolt-clamp splice or a wire splice made as follows: the end of the wires shall be carried 3 inches (75 mm) past the splice tool and wrapped around the other wire away from the tool for at least six turns in opposite directions. After the tool is removed, the space occupied by it shall be closed by pulling the ends together. The unused ends of the wires shall be cut close to make a neat, workmanlike job. Woven wire shall be spliced only at posts.

164-3.7 This section not used.

164-3.8 Installing gates. Gates shall be hung on gate fittings. Fittings on the gate posts shall be clamped, screwed, or bolted to prevent slipping. Gates shall be erected to swing in the direction coordinated with the owner and shall be provided with gate stops. Gates shall be erected at locations coordinated with the owner.

164-3.9 Existing fence connections. Wherever the new fence joins an existing fence, either at a corner or at the intersection of straight fence lines, a corner or anchor post shall be set at the junction and braced and anchored the same as described for corner posts. If the connection is made at other than the corner of the new fence, the last span of the old fence shall contain a brace span.

F_164-3 164-3.10 Electrical grounds, Electrical grounds shall be constructed at 500 feet (150 m) intervals. The ground shall be accomplished with a copper clad rod 8 feet (2.4 m) long and a minimum of 5/8 inches (16 mm) in diameter driven vertically until the top is 6 inches (150 mm) below the ground surface. A No. 6 solid copper conductor shall be clamped to the rod and to the fence in such a manner that each element of the fence is grounded. Installation of ground rods shall not constitute a pay item and shall be considered incidental to fence construction. The Contractor shall comply with FAA-STD-Ol 9, Lightning and Surge Protection, Grounding, Bonding and Shielding Requirements for Facilities and Electronic 164-3.11 Weed control application. Weed control material shall be applied over an area 5 feet (1.5 m) wide, measured from the fence centerline, and over the chain link wildlife fence. Apply weed control material as recommended by the manufacturer's instructions and in compliance with state and local regulations.

164-3.12 Cleaning up. The Contractor shall remove from the vicinity of the completed work atl tools, buildings, equipment, etc., used during construction. All disturbed areas shall be seeded per Item T-901.

METHOD OF MEASUREMENT

164-4.1 Fence. Fence shall be measured in place from outside to outside of end posts or corner posts and shall be the length of fence actually constructed, except for the space occupied by the gates.

164-4.2 Wildlife Excursion Fence Skirt (Concrete 2 feet depth). Concrete fence skirt with anchor bolts shall be measured for payment by the linear foot to the nearest foot. Measurement shall be along the fence from center to center of end or corner posts, excluding the length occupied by gate openings.

164-4.3 Vehicle gates. Vehicle gates shall be measured in units for each gate installed and accepted.

164-4.4 Concrete gate pad/footer to be coordinated with owner. The preferred method is to have the footer run underneath the gates when the gates are closed to prevent burrowing animals from being able to enter under the gates.

164-4.5 Weed control application. Shall be incidental to the cost of the fence.

BASIS OF PAYMENT

164-5.1 Payment will be made as a lump sum.

164-4

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 F1083

Standard Specification for Pipe, Steel, Hot-Dipped Zinc-Coated (Galvanized) Welded, for Fence Structures

ASTM International (ASTM)

American Wood Preservers Association (AWPA) AWPA UI Use Category System: User Specification for Treated Wood Federal Specifications (FED SPEC) FED SPEC RR-F-191/Gen Fencing, Wire, and Post Metai (and Gates, Chain-link Fence Fabric, and Accessories) (General Specification) FED SPEC RR-F-191/4 Fencing, Wire and Post, Metal (Chain-I-ink Fence Accessories)

F_164-5

Runway 35 RPZ Clearing, Minor Grading, and Wildlife Exclusion Fence Fencing Improvements Project Valdosta Regional Airport (VLD) Runway 35 RPZ Clearing, Minor Grading, and Wildlife Exclusion Fence Fencing Improvements Project Valdosta Regional Airport (VLD) FAA Standard

FAA-STD-019

FAA Order Lightning and Surge Protection, Grounding, Bonding and Shielding Requirements for Facilities and Electronic Equipment

END OF ITEM F-164

Runway 35 RPZ Clearing, Minor Græling, and Wilditfe Fence Improvements Prqect

Improvements Prqect

Improvements Prqect Valdosta Reglonal (VLD)

Exclusion

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