02834 Collins Wire and Gates Fence Project Final.pdf

DIVISION 2 SECTION 02834

SITEWORK WIRE FENCES AND GATES

BFO BLM COLLINS FENCE REMOVAL AND REALIGNMENT PROJECT 02834-1 of 8

PART 1: GENERAL

1.01 SUMMARY

A. Section Includes: Installing with Contractor-furnished property wire fences and gates and Government furnished property.

1.02 SUBMITTALS

A. General: Submittals shall be according to Section 01009 - General Information and

Requirements.

B. Certificates of Conformance: Submit 2 copies of written certification from the treating plant stating that chemicals and methods used for wood preservation and net amount of preservative retained are in conformance with applicable standards.

1.03 QUALITY ASSURANCE

A. General: Contractor-furnished gates and accessories will be approved by the Contracting

Officer before installation.

PART 2: PRODUCTS

2.01 CONTRACTOR-FURNISHED MATERIALS

A. Barbed Wire: A strand of two 12-1/2-ga galvanized wires twisted together with 2-point barbs of 14-ga wire spaced 4 inches apart. Wire and barbs shall be zinc-coated steel, with a zinc coating of at least 0.3 oz/ft2 of coated surface area. The minimum breaking strength of each wire shall be 950 lb-force. The barbed wire shall conform to ASTM A121.

B. Barbless Wire: A strand of two 12-1/2-ga, galvanized wires twisted together. Wire shall be zinc-coated steel wire of at least 0.3 oz/ft2 of coated surface area. The minimum breaking strength of each wire shall be 950 lb-force. The barbless wire shall conform to ASTM A 121.

C. Staples: Bright-finish or galvanized 9 gauge with slash-cut points 1-1/2 inches long.

D. Steel Fence Posts: ASTM A 702; painted solid green or green with white or silver tops "T" bar type, with a welded or riveted anchor plate. Furnish with clip-type wire fasteners (punched tabs for fastening wires are not acceptable). Steel posts shall be manufactured from wrought, rail, or new billet steel, and shall have a minimum weight of 1.33 lb/lin ft. The anchor plates shall weigh a minimum of 0.67 pounds ±5 percent and be a minimum of 18 in2 in area.

E. Galvanized 60d nails

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F. Wood Posts and Braces:

1. Acceptable Wood Posts and Braces: Sound single-stem members. A slight bend in one plane is acceptable. Posts and brace rails may be full stem members, sawed members of square cross section, or split members (western red cedar only). Line posts and brace rails shall be at least 4 inches minimum diameter at the small end and at least 6.5 feet in length. All wood posts used for vertical portions of braces shall be 6 inches minimum diameter at the small end and at least seven feet in length.

Minimum cross-sectional area at the small end for split members shall be 10 in2. Honey locust, western red cedar (full stem with bark removed), juniper, osage orange, and white oak are acceptable without treatment.

2. Basis for Rejection: Posts are not acceptable when sweep causes a straight line joining the center of the top to the center of the butt to fall outside the body of the post, or at a point 2 inches or more from the center of the post. Posts that are charred, twisted, rotted, or excessively bent are not acceptable. Seasoning checks, single or opposite each other with a sum total equal to or more than 1/2 the thickness of the post are not acceptable.

G. Brace Wires: Four wires of 9-ga smooth, galvanized wire or 2 wires of galvanized, 12-1/2-ga barbless wire. The minimum weight of zinc coating for 9-gauge wire shall be at least 0.4 oz of zinc/ft2 of coated surface area; for 12-1/2-ga wire at least 0.3 oz of zinc/ft2 of coated surface area.

H. Miscellaneous Wire: Wire for ties, gate loops and fastening wood stays shall be 9 or 12-1/2-ga galvanized wire.

I. Clip-Type Wire Fastener: Galvanized wire, 8 gauge.

J. Wire Stays—Twisted galvanized metal stay shall be at least 38 inches in length

K. Steel Frame Gates: 16-foot Gates as shown on Figure 4, page 8 of these Specifications.

l. Stress, End, and Corner Panels: Stress, End, and Corner Panels as shown on Figure 3, page 7 of these Specifications.

2.02 GOVERNMENT FURNISHED MATERIALS

No Government furnished materials are to be provided to Contractor.

2.03 WOOD TREATMENT PRACTICES

A. General: The following treatments may be used. Minimum net retentions and penetrations shall be according to AWPA C 5. The treatment method shall be in accordance with AWPA C1.

B. Chromated Copper Arsenic Method: Chromated copper arsenate, waterborne preservative conforming to Type A, B, or C in AWPA P 5.

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C. Quality Assurance: Posts shall bear a quality mark or tag of a program approved by the

Contracting Officer. If the certification is completed by an AWPA representative, his hammer stamp will be accepted as evidence of inspection.

PART 3: EXECUTION

3.1 PREPARATION

A. All vehicles used during construction or for maintenance shall be confined to the work areas and the trails leading to them. Work will not proceed when soil moisture conditions are wet and subject to ruts being created. Clearing brush and other vegetation will be kept to a minimum.

Mowing and cutting of heavy brush will be permitted but the blading of brush will not be allowed.

If any slash piles are located nearby, woody debris may be added the piles. If there are no piles present, woody debris should be cut and scattered in heights of less than 18 inches. If any trees greater than 7 inches diameter at breast height are removed, logs should not be added to slash piles.

Disperse any other cleared debris adjacent to the fence.

3.2 INSTALLATION

A. General: Steel posts shall not be used for end-panel, corner-panel, gate-panel, or stress-panel posts. Set wood posts in dug or drilled holes. Drive steel posts. When treated members must be bored or cut during construction, thoroughly swab untreated surfaces with copper naphthenate.

B. Ratio of Wood to Steel Line Posts: 1:4.

C. Setting Posts: Dig holes for setting wood posts to the depth as shown on the Work Data Sheet.

Set posts plumb and to the spacing and grades as shown on the drawings, unless staked otherwise.

Space within 6 inches of that dimension shown on the drawings or in the Work Data Sheet. Holes shall provide adequate open space around the post so backfill can be tamped the full depth around the post. Backfill gradually and uniformly with soil around each post. Compact backfill firmly from the bottom of the hole to the ground surface.

D. Driving Steel Posts: Drive into the ground to the depth shown on the drawings or until the anchor plate is slightly below the ground surface. Posts shall be driven plumb. When rock formations prevent driving remove anchor plate and excavate or drill holes a minimum of 18 inches deep and slightly larger than the diameter of the post. Place posts in the holes and grout the post solidly in position.

E. Corner Post, Gate Post, Corner Panel, Brace, End Panel, and Stress Panel Assemblies:

Construct as shown on the drawings. Rock jacks shall not be substituted for these items. Construct stress panels on crests of hills, maximum of 1320 feet or when the fence turns center-to-center for barbed wire sections. In addition, stress panels are required at points between which wire is to be stretched. Construct end panels at the end of fence runs unless shown otherwise on the drawings.

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F. Wire: Stretch tightly and staple to wood posts or securely attach to steel posts with standard wire clips or tie wire twisted tight. Wire is properly stretched when it is springy to the touch. Drive staples crosswise with the grain of the wood. The wire shall be free to move through the staples as it expands and contracts. Terminate wire at each end post, gate post, corner post, or stress panel.

Wrap wire around the post two times and tie off by wrapping around the incoming wire a minimum of four times.

G. Brace Wire: Double-loop and twist tight with a stick. Leave one end of the stick long enough to fasten behind the horizontal brace to prevent wire from unwinding.

H. Spiking: For spikes larger than 40d, predrilled lead holes shall be used. The hole diameter shall be three-fourths the diameter of the spike and drilled to a depth no greater than 1/2 the length of the spike.

I. Gates: Steel frame gates installed according to the Work Data Sheet, the drawings, and as recommended by the manufacturer when applicable. Existing walk through gates will be re-used in the relocated fence where possible.

J. OHV Cattleguard Gate: Existing OHV Cattleguard Gate will be removed during fence removal and retained for installation on realigned fence.

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT

A. Units: The work described in this section will be measured and paid for by the foot for each type of fence as measured along the ground surface next to the completed fence, including distance across gate openings. End panels, corner panels, stress panels, and gates will be measured and paid for by the number of each assembly completed. Gates do not include the adjacent end panels.

4.02 BASIS OF PAYMENT

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

Pay Item Description Pay Unit

02834(1) 4-Wire Fence (3-Barbed, 1 Smooth) ................................................ Lineal Foot 02834(2) Single H Stress Panels ................................................................................Each 02834(3) Type I or Type II End Panel .......................................................................Each 02834(4) Steel Gates (16-foot) ...................................................................................Each 02834(5) 3-Post Corner Panels ...................................................................................Each 02834(6) Double H Stress Panels ...............................................................................Each 02834(7) Relocate Existing OHV Gate .....................................................................Each 02827(8) Fence Removal ................................................................................ Lineal Feet 01505(9) Mobilization/Bonds/Taxes/Insurance/Demobilization Lump Sum

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WORK DATA SHEET

GENERAL:

Construct a 4-Wire Fence (3-Barbed, 1-Smooth):

• 3.04 miles (16,032 feet) approximately

• Line post spacing (L): 16.5 feet

• Length of 4-inch diameter wood posts (H1): 6-feet 6-inches

• Ratio of wood posts to steel line posts: 1 wood:4 steel

• Depth of 4-inch diameter wood posts in ground (h1): 2-feet 6-inches

• Length of 6-inch diameter wood posts in ground (H1): 7-feet 0-inches

• Depth of 6-inch diameter wood posts in ground (h1): 3-feet 0-inches

• Length of steel posts (H2): 5-feet 6-inches

• Depth of steel posts in ground (h2): 1-foot 6-inches

• Wire Spacing (Refer to Figure 3 02834-7): 4-Wire: A. 16-Inches B: 6-Inches

C: 8-Inches D: 12-Inches

• Type of Wire: Top three wires barbed (B-D). Bottom wire A smooth.

• Number of Single H Stress panels: 12

• Number of Type I or Type II End Panels (HN or Double H combinations) for mild topography changes: 48

• Total Fence: 16,032 linear feet, approximately

• Number of Steel Frame Gates: (4) 16 feet wide

• Number of 3-Post Corner Panels: 12

• Number of Panels at Minor Depressions: 50

• Existing OHV Cattle Guard & Walk-through gate removed and relocated to new fenceline: 1

• Fence Removal & Disposal: 3.16 miles (16,661 feet)

Materials Totals Estimated for Project:

A. (204) Wood Post 6-inch x 7-8 feet for corners, stress, and end panels B. (332) Wood post 4-inch x 6.5-7 feet for line posts and horizontals on braces C. (802) Steel post 5.5 feet D. (36) Rolls 2-point barbed wire E. (13) Rolls Smooth wire F. (1002) stays G. Clips (4 per steel post) H. Galvanized 60 d Nails (4-12 per brace) I. Staples (4 per wood post)

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Figure 3: End Panels, Stress Panels, and Panels at Minor Depressions

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Figure 4: Steel Frame Gate

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Figure 5: Corner Panel Assemblies