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Wire fences and Gates

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									SECTION TABLE OF CONTENTS SECTION 526 WIRE FENCES AND GATES

PART 1 1.1 1.2 1.3 1.4 1.5 PART 2 2.1

GENERAL DESCRIPTION DEFINITIONS REFERENCES SUBMITTALS QUALITY ASSURANCE PRODUCTS CONTRACTOR-FURNISHED MATERIALS 2.1.1 WOOD POSTS AND BRACES 2.1.2 WOOD TREATMENT PRACTICES EXECUTION 3.1 3.2 PREPARATION INSTALLATION 3.2.1 SETTING POSTS 3.2.2 DRIVING POSTS 3.2.3 CORNER POST, GATE POST, CORNER PANEL, BRACE, AND END PANEL (STRESS PANEL) ASSEMBLIES 3.2.4 WIRE 3.2.5 BRACE WIRE 3.2.6 GATES 3.2.7 MECHANICAL GATE CLOSERS 3.2.8 SPIKING

PART 3

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SECTION 526 Page 1

SECTION 526 WIRE FENCES AND GATES PART 1 1.1 GENERAL Description

This work item involves providing all materials, labor, equipment, and incidentals necessary for installation of a woven wire fence with two smooth wire strands and gates at the locations and in reasonably close conformity with the lines and grades shown on the Drawings or established by the Engineer. The top 2 strands shall be smooth high tensile in accordance with these specifications. The wire fence and gates shall be installed as shown on the Drawings. 1.2 1.3 Definitions (There are no definitions) References AMERICAN SOCIETY FOR TESTING MATERIALS (ASTM) A. ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated Welded and Seamless. B. ASTM A 116 C. ASTM A 121 D. ASTM A 702 E. ASTM A 854 F. ASTM F 1083 Standard Specification for Metallic Coated, Steel Woven Wire Fabric Fence. Standard Specification for Zinc coated (Galvanized) Steel Barbed Wire. Standard Specification for Steel Fence Posts and Assemblies Hot Wrought. Metallic-Coated Steel Smooth High-Tensile Force and Trellis Wire. Pipe, Steel, Hot-Dipped, Zinc Coated (Galvanized) Welded for Fence Structures.

1.4

Submittals

General: Submittals shall be according to Section 01330 SUBMITTAL PROCEDURES. A. SD-01 Preconstruction Submittals 1. Certificate by manufacturer of products to be furnished on this project, certifying that the products comply with applicable specifications.

B.

SD-03 Product Data 1. Certificate of conformance from wood treating plant stating that chemicals and methods used for wood preservation and net amount of preservative retained are in conformance with all applicable standards.

1.5 A.

Quality Assurance General: Contractor-furnished gates and accessories will be approved by the Engineer 5 days prior to installation.

SECTION 526 Page 1

PART 2 2.1
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PRODUCTS Contractor-Furnished Materials

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Woven Wire Field Fence Woven wire shall be a minimum of 48-inches in height of 12.5 gauge wire zinc coated steel. The minimum breaking strength shall be 950 lb-force and shall conform to ASTM A 121. . Barbless Wire: A strand of two 12-1/2-ga, galvanized wires twisted together. Wire shall be class 1 zinc-coated steel wire. The minimum breaking strength of each wire shall be 950 lb-force. The barbless wire shall conform to ASTM A 121. High-Tensile Smooth Wire: Single strands of 12-1/2-ga, class 3 zinc coating, grade 180 according to ASTM A 854. Wire Fence Stays: Twisted wire fence stays manufactured from smooth galvanized 9-gauge wire. Staples: Bright-finish or galvanized 9 gauge with slash-cut points. Nails: 20d. Steel Fence Posts: ASTM A 702; painted "T" or "U" (channel) 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/linear ft. The anchor plates shall weigh a minimum of 0.67 pounds +5 2 percent, and be a minimum of 18 inch in area. Wood Posts and Braces

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2.1.1
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Acceptable Wood Posts and Braces: Sound single-stem members. 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 6 inches minimum diameter at the small end. Sawed members shall be 4 x 4 rough sawn. Minimum cross 2 sectional area at the small end for split members shall be 10 in . Honey locust, western red cedar (full stem with bark removed), juniper, osage orange, and white oak are acceptable without treatment. 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. Wire Gates: Furnish with the same type wire and wire spacing as the fence. Wood stays for wire gates shall be sound and straight pieces, 3-inch minimum diameter, and of the species listed under posts and braces. Mechanical Gate Closers: Assembly must include the following salient features: A rigid steel strap or 9-ga smooth wire loop 6 inches from the ground securely connected to the gate post and shaped so the gate stay shall be securely held in place. An adjustable cable or chain, or rigid steel strap fastened to a cam lever device located 6 inches from the top of the gate post. The closer shall be capable of securely holding the gate stay in place. Brace Wires: Four wires of 9-ga smooth, galvanized wire or 2 wires of galvanized, 12-1/2-ga barbless 2 wire. The minimum weight of zinc coating for 9-gauge wire shall be at least 0.4 oz of zinc/ft of 2 coated surface area; for 12-1/2-ga wire at least 0.3 oz of zinc/ft of coated surface area.

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SECTION 526 Page 2

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Miscellaneous Wire: Wire for ties, gate loops and fastening wood stays shall be 9 or 12-1/2-ga galvanized wire. Clip-Type Wire Fastener: Galvanized wire, 11 gauge. In-Line Strainers: Single-click, ratchet type, using a double-leg strainer handle for adjustment Crimp Sleeves: Shall be of acceptable manufacture for use on high-tensile smooth wire. Wood Treatment Practices

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2.1.2

Wood posts for farm fence shall be treated with a minimum 5% by weight Chromated Copper Arsenate (CCA), Type B or C, or Ammoniacal Copper Arsenate (ACA) conforming to AWPA Standards. Treatment must be done in such a manner and with a carrying agent that the preservative will penetrate the wood at least 1/2 inch or full sap. Treatment shall extend the full length of the posts. Brace rails shall be treated. Post treatment must be performed at an approved plant. PART 3 3.1 A. 3.2
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EXECUTION Preparation Clearing: Shall be according to Section 02230 CLEARING AND GRUBBING. Installation

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 unless written authorization is obtained for driving line posts. Drive steel posts. When treated members must be bored or cut during construction, thoroughly swab untreated surfaces with copper naphthenate. Top wire (barbed) not to exceed 38-inches from ground, bottom wire (smooth) minimum 16-inches from ground. Ratio of Steel to Wood Line Posts: 10 steel to 1 wood not to exceed 300 feet between wood posts. Setting Posts

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3.2.1

Dig holes for setting wood posts to the depth as shown on Drawings. Set posts plumb and to the spacing and grades as shown on the Drawings, unless staked otherwise. Space holes within 6 inches of the dimension shown on the Drawings. Holes shall provide adequate open space around the post so backfill can be tamped the full depth around the post. Backfill holes gradually and uniformly with soil around each post. Compact backfill firmly from the bottom of the hole to the ground surface as fill is applied. 3.2.2
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Driving Posts

Wood Posts: Wood posts to be driven shall have tapered end driven into ground. Drive posts plumb. Posts that are split, bent or broomed, will not be accepted.

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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. 3.2.3 Corner Post, Gate Post, Corner Panel, Brace, and End Panel (Stress Panel) Assemblies

SECTION 526 Page 3

Construct as shown on the Drawings or as staked in the field. Rock jacks shall not be substituted for these items. Construct stress panels on crests of hills a maximum of 660 feet center-to-center for woven wire fence sections and a maximum of 1320 feet 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. When rock or unusual conditions make the construction of wood-post panels impractical, steel pipe panel may be constructed as approved by the Engineer. 3.2.4 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. High tensile wire shall be tied off at premarked heights by looping each wire around the post and fastening with two crimp sleeves. At the midpoint of the fence staple wires to the midpoint post. At the far end post-cut and tie-off wires using crimp sleeves. Take up slack at the midpoint of the fence and install in-line wire strainers for each fence wire. 3.2.5 Brace Wire

Double-loop and twist tight with a stick. For steel pipe panels, each wrap shall be looped once around the post. Leave one end of the stick long enough to fasten behind the horizontal brace to prevent wire from unwinding. 3.2.6 Gates

Installed according to the Drawings, and as recommended by the manufacturer when applicable. 3.2.7 Mechanical Gate Closers

Line up the latch with the gate. Adjust latch assembly after installation so that the latch does not bind and the gate hangs properly. 3.2.8 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.

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SECTION 526 Page 4


								
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