H - UFGS 32 31 13.53 High-Security Fences Chain Link and Gates.docx

SECTION TABLE OF CONTENTS DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 31 13.53

HIGH-SECURITY FENCES, CHAIN LINK, AND GATES

02/20

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 DELIVERY, STORAGE, AND HANDLING PART 2 PRODUCTS

2.1 COMPONENTS

2.1.1 Chain Link Fence Fabric

2.1.1.1 General

2.1.2 Posts

2.1.2.1 Metal Posts for Chain Link Fence

2.1.2.2 Accessories

2.1.3 Chain Link Braces and Rails

2.2 MATERIALS

2.2.1 Wire

2.2.1.1 Wire Ties

2.2.1.2 Barbed Wire

2.2.1.3 Tension Wire

2.2.2 Concrete

2.3 FENCE FABRIC REINFORCEMENT

2.3.1 Wire Rope Accessories

2.3.2 Turnbuckles

2.3.3 Rope Clamps

2.3.4 Threaded Rods, U-Bolts, and Bolts PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Line and Grade

3.1.2 Excavation

3.2 INSTALLATION

3.2.1 Installation Drawings

3.2.2 Security Fencing

3.2.3 Posts

3.2.3.1 Earth and Bedrock

3.2.3.2 Concrete Slabs and Walls

3.2.4 Rails

3.2.5 Fabric

3.2.6 Supporting Arms

3.2.7 Grounding

3.2.8 Cable Reinforcement Installation

3.3 CLOSEOUT ACTIVITIES

3.3.1 Cleanup

SECTION 32 31 13.53

HIGH-SECURITY FENCES (CHAIN LINK AND ORNAMENTAL) AND GATES

02/20

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.

ASTM INTERNATIONAL (ASTM)

ASTM A116 (2011) Standard Specification for Metallic-Coated, Steel Woven Wire Fence Fabric

ASTM A121 (2013) Standard Specification for Metallic-Coated Carbon Steel Barbed Wire

ASTM A153/A153M (2016a) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A240/A240M (2020a) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A307 (2014; E 2017) Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

ASTM A392 (2011a; R 2017) Standard Specification for Zinc-Coated Steel Chain-Link Fence Fabric

ASTM A478 (1997; R 2019) Standard Specification for Chromium-Nickel Stainless Steel Weaving and Knitting Wire

ASTM A491 (2011; R 2017) Standard Specification for Aluminum-Coated Steel Chain-Link Fence Fabric

ASTM A563 (2015) Standard Specification for Carbon and Alloy Steel Nuts

ASTM A666 (2015) Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar

ASTM A702 (2013) Standard Specification for Steel Fence Posts and Assemblies, Hot Wrought

ASTM A780/A780M (2020) Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM A824 (2011; R 2017) Standard Specification for Metallic-Coated Steel Marcelled Tension Wire for Use With Chain Link Fence

ASTM F567 (2014a) Standard Practice for Installation of Chain Link Fence

ASTM F626 (2014) Standard Specification for Fence Fittings

ASTM F844 (2019) Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use

ASTM F1043 (2018) Standard Specification for Strength and Protective Coatings on Steel Industrial Fence Framework

ASTM F1083 (2018) Standard Specification for Pipe, Steel, Hot-Dipped Zinc Coated (Galvanized) Welded, for Fence Structures

ASTM F1145 (2017) Standard Specifications for Turnbuckles, Swaged, Welded, Forged

ASTM F2408 (2016) Standard Specification for Ornamental Fences Employing Galvanized Steel Tubular Pickets

ASTM F2589 (2016) Standard Specification for Ornamental Fences Employing Steel Tubular Pickets

ASTM F2814 (2009; R 2015) Standard Guide for Design and Construction of Ornamental Steel Picket Fence Systems for Security Purposes

1.2 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification 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

Fence Installation Drawings; G SD-03 Product Data Fabric; G Posts; G Post Caps; G Chain Link Braces ; G Line Posts Sleeves; G Top Rail; G Bottom Rail; G Tension Wire; G Barbed Wire; G Barbed Wire Supporting Arms ; G Fence Fabric Reinforcement ; G SD-07 Certificates Chain Link Fence ; G Fabric; G Barbed Wire; G

Concrete; G SD-10 Operation and Maintenance Data

Operating and maintenance instructions; G

1.3 DELIVERY, STORAGE, AND HANDLING

Deliver materials to site in an undamaged condition. Store materials elevated off of the ground to protect against oxidation caused by ground contact.

PART 2 PRODUCTS

2.1 COMPONENTS

2.1.1 Chain Link Fence Fabric

2.1.1.1 General

Provide ASTM A392, Class 1, zinc-coated steel wire with minimum coating weight of 1.2 ounces of zinc per square foot of coated surface. ASTM A491, Type I, aluminum-coated steel wire.

Fabricate fence fabric of 9 gauge wire woven in 2 inch diamond mesh conforming to ASTM A116. Provide twisted and barbed fabric on the top selvage and knuckled on the bottom selvage.

2.1.3 Posts

2.1.3.1 Metal Posts for Chain Link Fence

2.1.3.2 Accessories

a. Provide accessories conforming to ASTM F626. Coat ferrous accessories with zinc or aluminum coating.

b. Provide truss rods with turnbuckles or other means of adjustment for each terminal post.

c. Provide barbed wire supporting arms of the 45 degree outward angle 3-strand arm type and of the design required for the post furnished. Secure arms by top rail bolting.

d. Furnish post caps in accordance with manufacturer's standard accessories.

e. Provide 9 gauge steel tie wire for attaching fabric to rails, braces, and posts and match the coating of the fence fabric. Use tie wires for attaching fabric to tension wire on high security fences made from 16 gage stainless steel. Provide double loop tie wires 6.5 inches in length.] Provide miscellaneous hardware coatings which conform to ASTM A153/A153M unless modified.

2.1.4 Chain Link Braces and Rails

ASTM F1083, zinc-coated, Group IA, steel pipe, size NPS 1-1/4. Provide Group IC steel pipe, zinc-coated, that meets the strength and coating requirements of ASTM F1043. Use braces and rails that are 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) to the requirements of ASTM F1043. Group II, formed steel sections, size 1-21/32 inch, conforming to ASTM F1043, may be used as braces and rails if Group II line posts are furnished.

Braces, top rail and bottom rail; Class 1, steel pipe, Grade, in size determined by manufacturer based on span length.

2.2 MATERIALS

2.2.1 Wire

2.2.1.1 Wire Ties

Submit samples as specified. Provide wire ties constructed of the same material as the fencing fabric.

2.2.1.2 Barbed Wire

Provide barbed wire conforming to ASTM A121 zinc-coated, Type Z, Class 3, or aluminum-coated, Type A, with 12.5 gauge wire with 14 gauge, round, 4-point barbs spaced no more than 5 inches apart.

2.2.1.3 Tension Wire

Provide Type I or Type II tension wire, Class 4 coating, in accordance with ASTM A824.Provide 7 gauge coil spring wire for top wire.

2.2.2 Concrete

Provide galvanized structural wire rope as indicated and in accordance with ASTM A1023/A1023M, 3/4 inch nominal diameter of strand, 19 wire strand, regular lay, extra improved plow steel (EIPS), independent wire rope core (IWRC) and with a minimum breaking strength of 40,800 pound-force. Galvanize cable, Class A, in accordance with

ASTM A1023/A1023M.

2.3.1 Wire Rope Accessories

All structural steel members used in cable anchoring system shall be hot-dipped galvanized. Clamps, U-bolts, and associated hardware shall be hot-dipped galvanized in accordance with ASTM A153/A153M.

2.3.2 Turnbuckles

Turnbuckles shall be 1-1/4 inches x 12 inches x inches Type I, Grade 1 galvanized, in accordance with ASTM F1145.

2.3.3 Rope Clamps

Rope clamps shall be hot-dipped galvanized in accordance with ASTM A153/A153M.

2.3.4 Threaded Rods, U-Bolts, and Bolts

All threaded rods, U-bolts shall conform to ASTM A307 and installed with ASTM F844 and ASTM A563 nuts. The entire bolt assembly shall be galvanized.

PART 3 EXECUTION

3.1 PREPARATION

Perform complete installation conforming to ASTM F567.

3.1.1 Line and Grade

3.1.2 Excavation

Excavate holes to depths indicated. Clear all post holes of loose material and spread waste material where directed. Eliminate ground and surface irregularities along the fence line to the extent necessary to maintain a 1 inch clearance between the bottom of the fabric and finish grade.

3.2 INSTALLATION

3.2.1 Installation Drawings

Submit complete Fence Installation Drawings for review and approval by the Contracting Officer prior to shipment. Submit drawing details that include, but are not limited to the following information: Fence Installation Drawings, Location of corner, end, and pull posts, and accessories. Install fence system per approved drawings.

3.2.2 Security Fencing

Install new security fencing as indicated in the drawings and maintain existing security fencing until new security fencing is in place. Perform related work to provide continuous security for the airfield at all times. If temporary fencing must be erected at sections it must be able to successfully keep all wildlife and unauthorized trespassers out.

Schedule and fully coordinate work with Contracting Officer.

3.2.3 Posts

3.2.3.1 Earth and Bedrock

a. Set posts plumb and in alignment. Except where solid rock is encountered, set posts in concrete to the depth indicated on the drawings. Where solid rock is encountered with no overburden, set posts to a minimum depth of 18 inches in rock. Where solid rock is covered with an overburden of soil or loose rock, set posts to the minimum depth indicated on the drawing unless a penetration of 18 inches in solid rock is achieved before reaching the indicated depth, in which case terminate depth of penetration. Grout all portions of posts set in rock.

b. Set portions of posts not set in rock in concrete from the rock to ground level. Set posts in holes not less than 16 inches diameter for terminal posts and 12 inches for line posts. Make diameters of holes in solid rock at least 1 inch greater than the largest cross section of the post. Thoroughly consolidate concrete and grout around each post, free of voids and finished to form a dome. Allow concrete and grout to cure for 72 hours prior to attachment of any item to the posts. Group II line posts may be mechanically driven, for temporary fence construction only, if rock is not encountered. Set driven posts to a minimum depth of 3 feet and protect with drive caps when setting.

c. Test fence post rigidity by applying a 50 pound force on the post, perpendicular to the fabric, at 5 feet above ground. Ensure post movement measured at the point where the force is applied is less than or equal to 3/4 inch from the relaxed position.

Test every tenth post for rigidity. When a post fails this test, make further tests on the next four posts on either side of the failed post. Remove, replace, and retest all failed parts at the Contractor's expense.

3.2.3.2 Concrete Slabs and Walls

When installed in concrete walls, set posts in zinc-coated sleeves, to a minimum depth of 12 inches. Fill sleeve joint with non-shrink grout, or other approved material. Set posts for support of removable fence sections in sleeves that provide a tight sliding joint and hold posts aligned and plumb without use of lead or setting material.

3.2.4 Rails

Bolt bottom rail to double rail ends and securely fasten double rail ends to the posts. Peen bolts to prevent easy removal. Install bottom rail before chain link fabric.

3.2.5 Fabric

a. Set fabric height at 7 feet as shown in drawings.

b. Install chain link fabric on the side of the post facing outward from the airfield. Attach fabric to terminal posts with stretcher bars and tension bands. Space bands at approximately 15 inch intervals. Install fabric and pull taut to provide a smooth and uniform appearance free from sag, without permanently distorting the fabric diamond or reducing the fabric height. Fasten fabric to line posts at approximately 15 inch intervals and fastened to all rails and tension wires at approximately 12 inch intervals.

c. Cut fabric by untwisting and removing pickets. Accomplish splicing by weaving a single picket into the ends of the rolls to be joined. Install the bottom of the fabric 1 plus or minus 1/2 inch above the ground.

d. After the fabric installation is complete, exercise the fabric by applying a 50 pound push-pull force at the center of the fabric between posts; use a 30 pound pull at the center of the panel to ensure fabric deflection of not more than 2.5 inches when pulling fabric from the post side of the fence. Every second fence panel is required to meet this requirement. Resecure and retest all failed panels at the Contractor's expense.

3.2.6 Supporting Arms

3.2.9 Grounding

a. Ground fencing as specified.

b. 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. Ensure grounding locations are located no more than 650 feet apart. Bond each gate panel 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.

3.2.10 Cable Reinforcement Installation

Comply with the contract drawings. Install 1strand of 3/4 in steel aircraft cables mounted to the chain link fence posts utilizing u-bolts and nuts. Peen the ends of the U-bolts to prevent removal. Tighten cables with galvanized steel turnbuckles with swaged fittings to the point there is no visible sag. Install 3 ft x 3 ft x 1.5 ft concrete deadman anchors which are a minimum of 3ft underground and installed in undisturbed surrounding soils. Space dead man anchors no more than 200 ft apart and on each side of gate openings. Connect steel aircraft cables to dead man anchors using swaged end fittings and turnbuckles attached to 1.25 in galvanized threaded rod which is embedded into concrete anchor and held in place with two 4 in x 4 in x ¼ in thick steel plates welded to the threaded rod. Place deadman anchors within 10 feet of last post and on each side of gate openings.

3.3 CLOSEOUT ACTIVITIES

3.3.1 Cleanup

Remove waste fencing materials and other debris from the work site through-out each workday. Pay critical attention to barbed wire debris so that vehicular/pedestrian traffic is not damaged/injured.

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SECTION 32 31 13.53

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