32_31_26_(Wire_Fence_ _Gate).pdf

SECTION 32 31 26 Page 1

SECTION 32 31 26

WIRE FENCES AND GATES

04/08

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY ASSURANCE

1.4 DELIVERY, STORAGE, AND HANDLING

PART 2 PRODUCTS

2.1 FENCE FABRIC

2.2 GATES

2.3 POSTS

2.4 BRACES AND RAILS

2.5 CONCRETE

2.6 PADLOCKS

PART 3 EXECUTION

3.1 INSTALLATION

3.2 EXCAVATION

3.3 POST INSTALLATION

3.4 BARBED WIRE

3.5 GATE ASSEMBLY

3.6 GROUNDING

PART 1 GENERAL

1.1 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.

AMERICAN WOOD-PRESERVERS' ASSOCIATION (AWPA)

AWPA U1 (2015) Use Category System: User Specification for Treated

Wood

ASTM INTERNATIONAL (ASTM)

ASTM A 116 (2011) Standard Specification for Metallic-Coated, Steel

Woven Wire Fence Fabric

ASTM A 121 (2013) Standard Specification for Metallic-Coated Carbon Steel Barbed Wire

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ASTM A 153/A 153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on

Iron and Steel Hardware

ASTM A 702 (2013) Standard Specification for Steel Fence Posts and Assemblies, Hot Wrought

ASTM A780/A780M (2009; R 2015) Standard Practice for Repair of Damaged and

Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM C 94/C 94M (2015) Standard Specification for Ready-Mixed Concrete

ASTM D 4541 (2009; E 2010) Pull-Off Strength of Coatings Using Portable Adhesion Testers

ASTM F 1043 (2016) Strength and Protective Coatings on Metal Industrial

Chain-Link Fence Framework

ASTM F 1083 (2016) Standard Specification for Pipe, Steel, Hot-Dipped Zinc Coated (Galvanized) Welded, for Fence Structures

ASTM F 1184 (2016) Industrial and Commercial Horizontal Slide Gates

ASTM F 626 (2014) Standard Specification for Fence Fittings

ASTM F 883 (2013) Padlocks

ASTM F 900 (2011) Industrial and Commercial Swing Gates

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Installation Drawings Fence Installation Location of gate, corner, end, and pull posts Gate Assembly Gate Hardware and Accessories

Installation drawings, as specified.

SD-03 Product Data

Manufacturer's Instructions Gate Assembly

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Manufacturer's catalog data.

SD-04 Samples

Fence Fabric Posts Post Caps Braces Top Rail Tension Wire Barbed Wire Stretcher Bars Gate Posts

Padlocks

Samples as described within this section.

1.3 QUALITY ASSURANCE

Provide manufacturer's instructions that detail proper assembly and materials in the design for fence, gate assembly, gate hardware and accessories. Submit Installation drawings clearly indicating Fence Installation Location of gate, corner, end, and pull posts; Gate Assembly and Gate Hardware and Accessories.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver materials to site in an undamaged condition. Store materials off the ground to provide protection against oxidation caused by ground contact. Prior to shipment, submit the following samples for review and approval:

Fence Fabric Posts Post Caps Braces Top Rail Tension Wire Barbed Wire Stretcher Bars Gate Posts

Padlocks

PART 2 PRODUCTS

2.1 FENCE FABRIC

Provide fence fabric conforming to the following:

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2.1.1 Woven Wire

ASTM A 116 fence; grade, size as indicated. Applicable fittings shall conform to ASTM F 626.

2.1.2 Barbed Wire

ASTM A 121 aluminum-coated, Type A, with 12.5 gauge wire with 14 gauge, round, 4-point barbs spaced no more than 5 inches apart.

2.2 GATES

Provide gate type and swing shown conforming to ASTM F 900 and/or ASTM F 1184, ASTM A 153/A 153M. Gate frames shall conform to strength and coating requirements of ASTM F 1083 for Group IA, steel pipe, with external coating Type A, nominal pipe size (NPS) 1-1/2. Gate frames shall be polyvinyl chloride-coated steel pipe (Group IA) (Group IC) with external coating Type A, a nominal pipe size () NPS) 1-1/2, conforming to ASTM F 1043. Gate leaves more than 8 feet wide shall have either intermediate members and diagonal truss rods or tubular members as necessary to provide rigid construction, free from sag or twist. Gate leaves less than 8 feet wide shall have truss rods or intermediate braces. Provide intermediate braces on all gate frames with an electro-mechanical lock.

Attach gate fabric to the gate frame by method standard with the manufacturer. Welding is not permitted. Furnish latches, hinges, stops, keepers, rollers, and other hardware items as required for the operation of the gate. Arrange latches for padlocking so that the padlock will be accessible from both sides of the gate. Provide stops for holding the gates in the open position.

2.3 POSTS

2.3.1 Metal Posts for Farm Style Fence

Provide metal posts conforming to ASTM A 702 zinc-coated, T-section or U-Section, length as indicated, and accessories conforming to ASTM A 702.

2.3.2 Composite Polyester Resin Reinforced Line Posts

Provide polyester resin reinforced line posts produced from unsaturated polyester resin reinforced with E-glass. Fill posts with an appropriate filler material to form a rigid structural support member. The post shall meet the strength requirements of ASTM F 1043 for heavy industrial fencing. Protect posts from UV and moisture degradation by a protective veil impregnated with resin (8 to 12 mil minimum) and an acrylic based (2 mil minimum) coating system. Posts shall exhibit corrosion and ultraviolet resistance as demonstrated when exposed to accelerated environmental test chamber for not less than 3,600 hours. The post shall not show structural failure (i.e., less than 10% loss of strength) as a result of exposure to moisture. Test post coating system strength in accordance with ASTM D 4541 for 90% adhesion strength. Posts shall be in color requested. Provide outside diameter as specified in ASTM F 1043 for round steel pipe.

2.3.3 Wood Posts

Provide wood posts cut from sound and solid trees free from short or reverse bends in more than one plane. Make tops convex rounded or inclined. Provide posts free of ring shake, season cracks more than 1/4 inch wide, splits in the end, and unsound knots. Provide posts of size and shape indicated.

Treat posts in accordance with AWPA C1 or AWPA C4 as applicable.

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2.4 BRACES AND RAILS

ASTM F 1083, zinc-coated, Group IA, steel pipe, size NPS 1-1/4. Group IC steel pipe, zinc-coated, meeting the strength and coating requirements of ASTM F 1043. Braces and rails shall be Group IA, steel pipe, size NPS 1-1/4 or Group II,formed steel sections, size 1-21/32 inch and be zinc coated (Type A) and polyvinyl chloride-coated conforming to the requirements of ASTM F 1043. Group II, formed steel sections, size 1-21/32 inch, shall conform to ASTM F 1043, if used as braces and rails when Group II line posts are furnished.

2.5 CONCRETE

ASTM C 94/C 94M, using 3/4 inch maximum size aggregate, and having minimum compressive strength of 3000 psi at 28 days. Provide grout consisting of one part portland cement to three parts clean, well-graded sand and the minimum amount of water to produce a workable mix.

2.6 PADLOCKS

Provide padlocks conforming to ASTM F 883, TYPE P01. All padlocks shall be keyed into master key system as specified in Section 08 71 00 DOOR HARDWARE.

PART 3 EXECUTION

3.1 INSTALLATION

Install fence to the lines and grades indicated. Clear the area on either side of the fence line to the extent indicated. Space line posts equidistant at intervals not exceeding 10 feet. Set terminal (corner, gate, and pull) posts at abrupt changes in vertical and horizontal alignment. Provide continuous fabric between terminal posts; however, runs between terminal posts shall not exceed 500 feet. Any damage to galvanized surfaces, including welding, shall be repaired with paint containing zinc dust in accordance with ASTM A 780.

3.2 EXCAVATION

Clear loose material from all post holes. Spread waste material where directed. Eliminate ground surface irregularities along the fence line to the extent necessary to maintain a 2 inch clearance between the bottom of the fabric and finish grade.

3.3 POST INSTALLATION

For wood posts (Farm Style Fence), excavate to depth indicated and brace post until backfill is completed. Place backfill in layers of 9 inches or less, moistened to optimum condition, and compacted with hand tampers or other approved method. Set posts plumb and in proper alignment.

Drive metal posts or set in concrete as indicated.

3.4 BARBED WIRE

Install wire on the side of the post indicated. Pull wire taut to provide a smooth uniform appearance, free from sag. Fasten wire to line posts at approximately 15 inch intervals unless indicated otherwise.

3.5 GATE ASSEMBLY

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For farm style fencing, provide standard metal gate assemblies with frame and fittings necessary for complete installation or wood gates as shown.

3.6 GROUNDING

Ground fences crossed by overhead powerlines in excess of 600 volts as specified in Section 26 41

01.00 10 LIGHTNING PROTECTION SYSTEM. Electrical equipment attached to the fence shall be grounded as specified in Section 33 71 01 OVERHEAD TRANSMISSION AND DISTRIBUTION and Section 33 70 02.00 10 ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND. Ground fences on each side of all gates, at each corner, at the closest approach to each building located within 50 feet of the fence, and where the fence alignment changes more than 15 degrees. Grounding locations shall not exceed 650 feet. Each gate panel shall be bonded with a flexible bond strap to its gate post. Ground fences crossed by powerlines of 600 volts or more at or near the point of crossing and at distances not exceeding 150 feet on each side of crossing. Ground conductor shall consist of No. 8 AWG solid copper wire. Grounding electrodes shall be 3/4 inch by 10 foot long copper-clad steel rod. Drive electrodes into the earth so that the top of the electrode is at least 6 inches below the grade. Where driving is impracticable, bury electrodes a minimum of 12 inches deep and radially from the fence. The top of the electrode shall not be less than 2 feet or more than 8 feet from the fence.

Clamp ground conductor to the fence and electrodes with bronze grounding clamps to create electrical continuity between fence posts, fence fabric, and ground rods. After installation, the total resistance of fence to ground shall not be greater than 25 ohms.

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