Attachment_B.__Standard_and_Drawings.pdf

STANDARD 2 – SITEWORK

2-27 September 2013

SECTION 2.10--FENCING

2.10.1 CHAIN LINK FENCE:

1. GENERAL: Standard and high-security chain link fence with gates and guard of three strands of barbed wire is shown on drawings 31 2000, 31 2001, and 31 2038. Ground the fence and gate in accordance with standard drawings 31 1060.

Openings in the substation fence shall be protected in accordance with the Standard 1 - General Requirements, Section 1.4.16 ”Substation Safety”.

2. MATERIAL: Match material in the existing fence as far as practicable with respect to type, size, and gage. Ferrous material shall be zinc-coated.

(1) Standard Chain Link Fabric: ASTM A 392, 2-inch mesh, 11-gage nominal wire diameter after coating, and 7 feet high.

(2) Security Chain Link Fabric: ASTM A 392, 1-inch mesh, 9-gage nominal wire diameter after class 1 (1.20 oz / sf) zinc coating, and 7-feet high.

(3) Bottom Tension Wire for use with Security Chain Link Fabric: ASTM A 392, 9-gage nominal wire diameter after class 1 (1.20 oz / sf) zinc coating.

(4) Fence Posts, Top rails, and Braces: ASTM F 1083, Schedule 40 steel pipe. Options shall be as shown on drawing 31 2000.

(5) Gates and Accessories: Except as shown on the drawings, gates and accessories shall be in accordance with ASTM F 900. Gates shall be swing-type with zinc-coated, round tubular frames. The zinc coating shall have an average weight of not less than 1.8 ounces per square foot of coated surface area. Gate fabric shall be the same as the fence fabric.

Each gate leaf shall be equipped with one pair of hinges that will allow a full gate opening between gate posts. Hinges shall allow the gate to be easily opened and closed by one person, and to swing a full 180 degrees without twisting or binding. Forked latch may be provided for the single gate less than 10 feet wide. Unless otherwise noted on the drawings, latch for double gate shall be of the "Double Gate Leaf Keeper" type or the plunger bar type of full gate height and arranged to engage the center stop. The latch shall have provisions for padlocking. The locking device shall be constructed so that the center drop rod or plunger bar cannot be raised when locked. Gate latch for gate shall be as shown on drawing 31 2001.

Gate hinges, latches, stops, keepers, and other accessories shall be zinc-coated, steel, ductile iron, or malleable iron except that wire ties, clip bolts, and nuts may be of aluminum alloy. Minimum weight of the zinc coating shall be 1.2 ounces per square foot of surface.

Barbed wire guard at the gate top shall be as shown on the drawings.

(6) Chain Link Fence Accessories: Except as shown on the drawings, fence accessories shall be in accordance with ASTM F 626. Post caps, rail ends, and barbed wire support arms shall be zinc-coated, steel, malleable iron, or ductile iron except that post caps and rail ends may be of cast iron. Rail sleeves, wire ties and clips, clip bolts, nuts, brace bands, tension bands, reinforcing wire, and tension bars shall be zinc-coated, steel except that wire ties, clip bolts, 2-28 September 2013 and nuts may be of aluminum alloy. Two 12 1/2-gage twisted, barbless, zinc-coated strands may be substituted for the 7-gage bottom reinforcing wire.

(7) Zinc-Coated Barbed Wire: Twelve-gage wire with 14-gage, four-point barbs, zinc-coated.

3. ERECTION:

(1) General: Brush, weeds, and other obstacles which interfere with proper fence erection shall be cleared and removed. Smooth ground irregularities (finished grade) and erect fence so that bottom of fabric is from 1 inch to 3 inches above finished grade at all locations.

(2) Fence Posts: Perform all required excavating, backfilling, and compacting of backfill for fence posts. Posts shall be plumb, in alignment, and set in concrete as shown on the drawings. Cement quantity shall be not less than 5 1/2 bags per cubic yard of concrete.

Placing, curing, and protection of concrete shall be in accordance with Standard 3 - Concrete.

(3) Damaged Galvanizing: Damaged areas of galvanizing shall be repaired in accordance with the ASTM A 780.

2.10.2 BARBED WIRE FENCE:

1. MATERIAL:

(1) Line Posts: Painted steel, heavy duty, T-shaped with steel anchors, 7 feet 0 inches in length, 1 3/8 inches x 1 3/8 inches in cross section, and of 1/8-inch-thick material.

(2) Gate, Corner, and Braced Panel Posts: Well-seasoned cedar or wood pressure treated with preservative. Pressure-treated posts shall be Douglas Fir, Western Larch, Lodgepole Pine, or Southern Yellow Pine. Gate posts shall be at least 7 inches diameter at the top. Corner and braced panel posts shall be 4 inches minimum diameter at top. Corner and braced panel posts shall be 8 feet 0 inches in length.

(3) Barbed Wire: Galvanized, 12 1/2-gage wire with four-point barbs.

(4) Stays and Fasteners: ASTM Specifications A121 and A702.

(5) Nails and Staples: Nails shall be bright, round nails. Staples shall be No. 9-gage galvanized-wire staples, not less than 1 1/2 inches long, and either U- or L-shaped with ringed shanks.

(6) Gates: Galvanized-steel tubular gate as shown drawing 41 9024. Set gates level and to swing in the direction as directed by the COR.

2. ERECTION: Remove brush and obstacles and level ground surface as required to erect fencing.

Conduct all operations as directed by the COR. Existing fencing shall be connected to new fencing by placing a corner post at each junction and fastening the existing and new fence wire to the post. Finished fencing shall be in alignment, taut, solid at all points, and thoroughly braced.

Set gate, corner, and braced panel posts in 4-foot-deep post holes filled with concrete. Concrete shall contain not less than 5 1/2 bags of Portland cement per cubic yard of concrete.

Drive steel line posts not less than 3 feet 0 inches below ground surface.

Space barbed wire strands 8 inches center-to-center, with first strand 16 inches above ground.

Wire shall be drawn tight and fastened securely to each post. Staples shall be driven diagonally to

2-29 September 2013 the grain of timber posts in a manner to hold wire securely without causing bends or nicks in the wire. Use wire stays to fasten barbed wire to steel posts.

Braced panels in line with fence and corner panels shall have panel posts spaced 8 feet 0 inches center-to-center with 4-inch x 4-inch horizontal wood bracing and cross-wire bracing similar to the gate braced panel shown on drawing 41 9024.

Barbed wire shall be placed on the side of the posts which is away from the substation site. At grade changes where stresses tend to pull posts from the ground, fencing shall be anchored as directed by the COR. Anchors shall consist of a double strand of No. 8-gage wire connecting each barbed wire strand to a "deadman" weighing not less than 100 pounds and buried in the ground not less than 2 feet.

2.10.3 CATTLE GUARDS:

1. DESIGN REQUIREMENTS: Design to support an AASHTO HS20 truck loading, with an allowable average soil pressure not to exceed 1,000 pounds per square foot. The horizontal framework members shall be spaced so as to prevent livestock from walking across the framework. The perimeter of the framework shall be supported by a continuous, reinforced concrete foundation.

The framework shall be protected by a reinforced concrete header which is to be a part of the continuous foundation. To facilitate cleaning underneath, provide removable sections which shall fit flush with the surface of the framework. The end wings shall be sloping 45° from end of the steel framework and tie in securely to the adjacent fence.

2. MATERIAL:

(1) Framework and 45° End Wings: The framework and 45° end wings shall be constructed from standard commercial quality steel members (channels, pipe, light-gauge rails, or other suitable shapes) and galvanized. Galvanizing shall be in accordance with Standard 4 - Substation Metalwork and Transmission Line Lattice Towers, Section 4.1.10 "Galvanizing and Painting". Painting shall be in accordance with the "Standard 12 - Painting.

(2) Concrete Foundation and Header: Reinforced concrete.

(3) Anchor Bolts: Anchor bolts, nuts, and washers shall be standard commercial quality, suitable for intended conditions of use.

3. CONSTRUCTION: Perform the required sitework in accordance with Section 2.5, "Excavation" and Section 2.8.1, "Placing and Compacting Backfill". Provide, place, cure, and finish concrete in accordance with the applicable sections of Standard 3 - Concrete. Fabricate, galvanize, and erect steel and other metalwork in accordance with Standard 4 - Substation Metalwork and Transmission Line Lattice Towers.

2.10.4 PERMANENT GATES IN EXISTING BARBED WIRE FENCES FOR TRANSMISSION LINE

ACCESS ROADS:

1. MATERIAL: Material shall be in accordance with the details shown on the drawings and the following:

(1) Barbed Wire Gates: As shown on drawing 41 9002.

(2) Electric Barbed Wire Gates: As shown on drawing 41 9003.

(3) Prefabricated Tubular Steel Gates: As shown on drawing 41 9024.

2. INSTALLATION: Install gates in existing fences where directed by the COR.

2-30 September 2013

2.10.5 FENCE GROUNDS FOR TRANSMISSION LINES:

1. MATERIAL: As shown on drawing 41 1011.

2. INSTALLATION:

(1) General: Install fence grounds in accordance with drawing 41 1011. Drive grounding rods to a depth of not less than 5 feet. Fasten fence wires securely to grounding rods with U-bolt clamps.

(2) Nonelectric Fences on Wood or Concrete Posts and Electric Fences: Ground with one grounding rod at hinge end of gates and one for each 1/8 mile of fence.

(3) Nonelectric Fences on Metal Posts: Ground with one grounding rod for each 1/4 mile of fence.

(4) Metallic Gates: Bond electrically to fence in accordance with drawing 41 9024.

(5) Fences Crossing Under Line: Ground with one grounding rod on each side of right-of-way.

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