32 31 13 Chain Link Fences and Gates.pdf

FEDERAL AVIATION ADMINISTRATION MAY 1, 2011

EASTERN SERVICE AREA STANDARD SPECIFICATION

CHAIN LINK FENCES AND GATES 32 31 13 - 1

SECTION 32 31 13 – CHAIN LINK FENCES AND GATES

PART 1 - GENERAL

1.1 WORK INCLUDED

A. The contractor shall provide all labor, materials and appurtenances necessary for installation of the fence system, including swing gates and sliding gates, as indicated on the drawings. This Section includes the following:

1. Galvanized steel chain-link fabric.

2. Galvanized steel framework.

3. Barbed wire.

4. Gates.

B. Grounding: Fence and gates shall be grounded as indicated on Contract Drawings, in compliance with FAA-STD-019, most current edition.

C. Gaps Under Fences and Gates: Maximum acceptable gap from firm ground or concrete is 2 inches under fence and 4 inches under gates. The contractor is required to cut concrete curbing that interferes with these dimensions, and otherwise modify site conditions as required to provide these dimensions.

D. Related Work: Cast-in-Place Concrete, Slide Gate Operator

1.2 REFERENCES

A. American Society for Testing and Materials

1. A 121: Zinc-Coated (Galvanized) Steel Barbed Wire

2. A 123: Specifications for Zinc (Hot-Galvanized) Coatings on Products Fabricated from

Rolled, Pressed and Forged Steel Shapes, Plates, Bars and Strip.

3. A 392: Zinc-Coated Steel Chain-Link Fence Fabric

4. B 117: Standard Test Method of Salt Spray (Fog) Testing

5. F 567: Standard Practice for Installation of Chain-Link Fence.

6. F 1083: Standard Specifications for Pipe, Steel, Hot-Dipped Zinc-Coated (Galvanized)

Welded, for Fence Structures.

7. F 1184: Standard Specification for Industrial and Commercial Horizontal Slide Gates.

B. Federal Specifications (FS)

1. RR-F-191: Fencing, Wire and Post, Metal Gates, Chain-Link Fabric, and Accessories

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1.3 DEFINITIONS

A. CLFMI: Chain Link Fence Manufacturers Institute.

B. Zn-5-Al-MM Alloy: Zinc-5 percent aluminum-mischmetal alloy.

1.4 SUBMITTALS

A. Product Data: Material descriptions, construction details, dimensions of individual components and profiles, and finishes for the following:

1. Fence and gate posts, rails, tension wire and fittings.

2. Chain-link fabric, reinforcements, and attachments.

3. Gates and hardware.

4. Barbed wire.

B. Shop Drawings: Show locations of fence, each gate, posts, rails, and tension wires and details of extended posts, extension arms, gate swing, or other operation, hardware, and accessories.

Indicate materials, dimensions, sizes, weights, and finishes of components. Include plans, elevations, sections, gate swing and other required installation and operational clearances, and details of post anchorage, footings and attachment and bracing.

1. Gate Operator: Show locations and details for installing operator components, switches, and controls. Indicate motor size, electrical characteristics, drive arrangement, mounting, and grounding provisions.

2. Wiring Diagrams: Power and control wiring and access control features. Differentiate between manufacturer-installed and field-installed wiring and between components provided by gate operator manufacturer and those provided by others.

C. Product Certificates: Signed by manufacturers of chain-link fences and gates certifying that products furnished comply with requirements.

D. Qualification Data: For firms and persons specified in "Quality Assurance" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names and addresses of architects and owners, and other information specified.

E. Field Test Reports: Indicate and interpret test results for compliance of chain-link fence and gate grounding and bonding with performance requirements.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: An experienced installer who has completed chain-link fences and gates similar in material, design, and extent to those indicated for this Project and whose work has resulted in construction with a record of successful in-service performance.

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B. Source Limitations for Chain-Link Fences and Gates: Obtain chain-link fences and primary personnel gates, including accessories, fittings and fastenings from a single source.

C. Source Limitations for Gate Operators: Obtain primary vehicle gates, gate operators, accessories, fittings, fastenings and installation services for primary vehicle gates and operators from a single source.

D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

E. UL Standard: Provide gate operators that comply with UL 325 “Standards for Safety for Drapery, Gate, Louver and Window Operators.”

F. Emergency Access Requirements: Comply with requirements of authorities having jurisdiction for automatic gate operators serving as a required means of access.

1.6 PROJECT CONDITIONS

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

1. Notify COR not less than 2 days in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without COR's written permission.

B. Field Measurements: Verify layout information for chain-link fences and gates shown on Drawings in relation to actual field conditions and existing structures and utilities. Verify dimensions by field measurements.

PART 2 - PRODUCTS

2.1 CHAIN-LINK FENCE FABRIC

A. Steel Chain-Link Fence Fabric: Height indicated on Drawings. Provide fabric fabricated in one-piece widths for fencing.

1. Zinc-Coated Fabric: Comply with ASTM A 392 Class 2 and FS: RR-R-191, Type I, with zinc coating applied to steel wire before weaving with the following minimum coating weight:

a. Not less than 2.0 oz. /sq. ft. of uncoated wire surface.

2. Coat selvage ends of fabric that is metallic coated during the weaving process with manufacturer's standard clear protective coating.

B. Selvage: Twisted and barbed finish at top and bottom selvage.

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2.2 INDUSTRIAL FENCE FRAMING

A. Round Steel Pipe: Standard weight, Schedule 40, galvanized steel pipe complying with ASTM F 1083 and RR-F-191 for Class F steel fence.

1. External and Internal Coating Type A consisting of not less than 1.8 oz/sq. ft. zinc.

B. Terminal Posts: Standard weight, Schedule 40 galvanized steel pipe, size as indicated on Contract Drawings.

C. Post Brace Rails: Provide brace rail with truss rod assembly for each gate, end, and pull post.

Provide two brace rails extending in opposing directions, each with truss rod assembly, for each corner post and for pull posts. Provide rail ends and clamps for attaching rails to posts.

1. Size as indicated on Contract Drawings.

D. Extended Members: Extend end and corner posts above top of chain-link fabric 12 inches as required to attach barbed wire assemblies.

2.3 TENSION WIRE

A. General: Provide horizontal tension wire at the following locations:

1. As indicated on drawings

B. Galvanize, gage indicated on Drawings, coiled spring wire, provided within the bottom 4 inches of the fabric. Zinc coating shall weight 1.6 ounces per square foot minimum. Attach to fence fabric as indicated on Contract Drawings. Crimp rings tight to prevent noise. No loose or rattling equipment will be allowed.

2.4 GATES, GENERAL

A. Gates for Class F Fence: Conform to FS-RR-F-191.

B. Primary personnel gates shall be manually operated, self-closing, with provisions for padlocks.

C. Primary vehicle gates located at the Entrance shall be power operated and activated by an electronic access control system.

D. Hinges: Provide large bearing surfaces for clamping in position. Hinges shall not twist of turn under action of the gate. Non-motorized gates shall be capable of being opened and closed easily by one person and shall be arranged so they may swing back parallel to the fence.

Latches, stops and keepers shall be provided for gates, unless otherwise shown on drawings.

Keepers shall consist of a substantial mechanical device for securing and supporting the gate in the full open position. Spring, forked or pig-ear latches shall be provided for gates, except as noted on drawings. Provide heavily galvanized steel hinge, latches, stops, and keepers.

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2.5 INDUSTRIAL SWING GATES

A. General: Comply with FS RR-F-191 for the following swing-gate (Sliding gates use ASTM F1184) types:

1. Double vehicle gate.

2. Single pedestrian gate.

B. Metal Pipe and Tubing: Galvanized steel. Comply with ASTM F 1083 and ASTM F 1043 for materials and protective coatings.

C. Frames and Bracing: Fabricate from round galvanized steel tubing with outside dimension and weight according to FS RR-F-191 for the following gate fabric height:

1. Gate fabric height indicated on Drawings.

D. Gate Posts: Fabricate members from round galvanized steel pipe with outside dimension and minimum weight according to FS-RR-F-191 for the following gate characteristics:

1. Gate fabric heights indicated on Drawings.

2. Gate Opening Width: Over 12 feet but not over 30 feet.

E. Extended Gate Posts and Frame Members: Extend gate posts and frame end members above top of chain-link fabric at both ends of gate frame as indicated on Drawings as required to attach barbed wire assemblies.

F. Hardware: Latches permitting operation from both sides of gate, locking devices assemblies and stops fabricated from galvanized steel. Fabricate latches with integral eye openings for padlocking; padlock accessible from both sides of gate.

2.6 FITTINGS

A. General: Provide fittings for a complete fence installation, including special fittings for corners.

B. For steel fences, stretcher bar and tension wire bands or clamps shall be 11-gage (0.1205-inch diameter) minimum thickness galvanized pressed steel bands; ties for attaching fabric to line posts shall be equal to 6-gage (0.0162 inch diameter) galvanized steel wire; ties for attaching fabric to top and brace rails shall be equal to 9-gage (0.1483 inch diameter) galvanized steel wire; and hog rings shall be equal to 9-gage (0.143-inch diameter) galvanized steel wire, except that stretcher bar clamps, ties and hog rings may be of aluminum conforming to the requirements of FS – RR-F-191.

C. Post and Line Caps: Hot-dip galvanized pressed steel or hot-dip galvanized cast iron. Provide weathertight closure cap for each post.

1. Provide line post caps with loop to receive tension wire.

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D. Stretcher Bars: Fabricate one piece lengths equal to full height of fabric with a minimum cross section of 1/4-inch by 3/4-inch. Provide one stretcher bar of each gate, end post, and two for each corner or pull post.

E. Stretcher Bar Bands: Heavy pressed steel, spaced not over 14 inches on center to secure stretcher bars to end, corner, pull and gate posts. Bands shall be within 4 inches of the top and bottom of fence fabric.

F. Barbed Wire Arms: Twelve-gage pressed steel increasing the height of the fence to as indicated on Contract Drawings. The arms shall extend 45 degrees from the horizontal. Arms shall be capable of withstanding without failure 250 pounds downward pull at the outermost end of the arm. Fasten wires to the arm slots of heavy pins. Arms shall match existing fencing in area.

1. Size and Construction: As indicated on Drawings.

G. Tie Wires, Clips, and Fasteners: Provide the following types:

1. Standard Round Wire Ties: For attaching chain-link fabric to posts, rails, and frames, complying with the following:

a. Hot-Dip Galvanized Steel: Nine-gage wire; galvanized coating thickness matching coating thickness of chain-link fence fabric. Spaced at 14 inches o.c.

2.7 BARBED WIRE

A. Twisted Aluminized Steel Barbed Wire: Comply with RR-F-191 for the following three-strand barbed wire:

1. Standard Size and Construction: As indicated on Drawings.

2.8 CAST-IN-PLACE CONCRETE

A. General: Comply with ACI 301 for cast-in-place concrete.

B. Materials: Portland cement complying with ASTM C 150, aggregates complying with ASTM C 33, and potable water.

1. Concrete Mixes: Normal-weight concrete, air entrained with not less than 3000-psi compressive strength (28 days), 3-inch slump, and 3/4-inch maximum size aggregate.

2.9 GROUT AND ANCHORING CEMENT

A. Nonshrink, Nonmetallic Grout: Premixed, factory-packaged, nonstaining, noncorrosive, nongaseous grout complying with ASTM C 1107. Provide grout, recommended in writing by manufacturer, for exterior applications.

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B. Erosion-Resistant Anchoring Cement: Factory-packaged, nonshrink, nonstaining, hydraulic-controlled expansion cement formulation for mixing with potable water at Project site to create pourable anchoring, patching, and grouting compound. Provide formulation that is resistant to erosion from water exposure without needing protection by a sealer or waterproof coating and that is recommended in writing by manufacturer for exterior applications.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine areas and conditions, with Installer present, for compliance with requirements for a verified survey of property lines and legal boundaries, site clearing, earthwork, pavement work, and other conditions affecting performance.

1. Do not begin installation before final grading is completed, unless otherwise permitted by

COR.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Stake locations of fence lines, gates, and terminal posts. Do not exceed intervals of 500 feet or line of sight between stakes. Indicate locations of utilities, lawn sprinkler system, underground structures, benchmarks, and property monuments.

3.3 INSTALLATION, GENERAL

A. General: Install chain-link fencing to comply with FS RR-F-191.

1. Install fencing as indicated on the Drawings.

B. Post Excavation: Drill or hand-excavate holes for posts to diameters and spacings indicated, in firm, undisturbed or compacted soil.

1. Drill holes for post footings in firm, undisturbed or compacted soil. Holes shall have a diameter equal to 4 times the diameter of the post except where otherwise indicated on the drawings.

2. Excavate hole depths approximately 3 inches deeper than post bottom with bottom of lineposts set not less than 36 inches in concrete base, except where otherwise indicated on the drawings.

C. Post Setting: Hand-excavate holes for post foundations in firm, undisturbed or compacted soil.

Set terminal, line and gate operator-mounting posts in concrete footing. Protect portion of posts aboveground from concrete splatter. Place concrete around posts and vibrate or tamp for consolidation. Verify that posts are set plumb, aligned, and at correct height and spacing, and hold in position during placement and finishing operations until concrete is sufficiently cured.

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1. Maximum spacing between line posts is 10 feet.

2. Set keepers, stops, sleeves, and other accessories into concrete as required.

3. All posts shall be able to pass a pull test when a force of 48 pounds is applied perpendicular to the fence at the top of the post. The post should not deflect more than 1 inch at the location where the force is applied.

4. Post tops shall be riveted or shall be spot-welded. No loose or rattling fittings will be allowed.

5. Concealed Concrete Footings: Stop footings 2 inches below grade to allow covering with surface material.

3.4 CHAIN-LINK FENCE INSTALLATION

A. Terminal Posts: Locate terminal end, corner, and gate posts and terminal pull posts at changes in horizontal or vertical alignment of 15 degrees or more.

B. Post Bracing Assemblies: Install according to FS RR-F-191, maintaining plumb position and alignment of fencing. Install braces at end and gate posts and at both sides of corner and pull posts. Locate horizontal braces at two-thirds fabric height on fences without top rail. Install so posts are plumb when diagonal rod is under proper tension.

1. Anchor posts shall be set at approximately 500-foot intervals and braced to the adjacent line posts. Posts shall be braced before the wire fencing is placed.

C. Tension Wire: Install according to FS RR-F-191, maintaining plumb position and alignment of fencing. Pull wire taut, without sags. Fasten fabric to tension wire with 0.120-inch- diameter hog rings of same material and finish as fabric wire, spaced a maximum of 24 inches o.c.

Install tension wire in locations indicated before stretching fabric.

1. Top Tension Wire: if indicated on drawings- Install tension wire through post cap loops.

2. Bottom Tension Wire: Install tension wire within 6 inches of bottom of fabric and tie to each post with not less than same gage and type of wire.

D. Top Rail: If indicated on drawings-Install according to FS RR-F-191, maintaining plumb position and alignment of fencing. Run rail continuously through line post caps, bending to radius for curved runs and terminating into rail end attached to posts or post caps fabricated to receive rail at terminal posts. Provide expansion couplings as recommended by fencing manufacturer.

E. Intermediate Rails: If indicated on drawings-Install in one piece at post-height center span, spanning between posts, using fittings, special offset fittings, and accessories.

F. Bottom Rails: If indicated on drawings-Install, spanning between posts, using fittings and accessories.

G. Chain-Link Fabric: Apply fabric to outside of enclosing framework. Leave 1 inch between finish grade or surface and bottom selvage, unless otherwise indicated. Pull fabric taut and tie to posts, rails, and tension wires. Anchor to framework so fabric remains under tension after pulling force is released.

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H. Tension or Stretcher Bars: Provide two stretcher bars for each pull post. Thread through fabric and secure to end, corner, pull, and gate posts with tension bands spaced not more than 14 inches o.c.

I. Tie Wires: Use wire of proper length to firmly secure fabric to line posts and rails. Attach wire at one end to chain-link fabric, wrap wire around post a minimum of 180 degrees, and attach other end to chain-link fabric. Bend ends of wire to minimize hazard to individuals and clothing.

1. Maximum Spacing: Tie fabric to line posts 12 inches o.c. and to braces 24 inches o.c.

J. Fasteners: Install nuts for tension bands and carriage bolts on the side of the fence opposite the fabric side.

K. Barbed Wire: Install 3 strands of barbed wire parallel on each extension arm, on the exterior side of fence (away from the Government property), unless otherwise shown. Barbed wire support arms shall have a tight press-fit or shall be spot-welded to preclude surreptitious removal. At end and gate posts, barbed wire shall be wrapped once around the posts and clipped and the ends of the horizontal wires tied with a snug tight twist. Each longitudinal wire shall be stapled to each post with a clip designed for use with steel posts. No loose or rattling fittings will be allowed. Pull wire taut to ninety pounds of tension.

3.5 GATE INSTALLATION

A. Install swing gate posts in accordance with ASTM F 567.

B. Gate locations and sizes shown on Drawings. Fabric shall be attached to the side of the gate frame that will be away from the Government property when the gate is installed in the closed position. Fabric shall be securely attached to the gate frame at intervals not exceeding 15 inches.

Attachment to the vertical members of the gate frame shall be made through stretcher bars.

C. Install gates according to manufacturer's written instructions, level, plumb, and secure for full opening without interference. Attach fabric as for fencing. Attach hardware using tamper-resistant or concealed means. Install ground-set items in concrete for anchorage. Adjust hardware for smooth operation and lubricate where necessary.

D. Hinges, latches, stops and keepers for Class “F” fence gates shall conform to the requirements of FS-RR-F-191. All latches shall be arranged for locking the gates in the closed position.

E. Gates shall be hung on two hinges attached in such a manner that the gates cannot be lifted off.

Gates for Class “F” fences shall be installed to swing opposite to the slope of the extension arms, and if a driveway passes through a gate at an angle, the gate shall be hung on the side giving the greatest clear opening. To insure positive latching, the leg of the gatepost of fences on which the latch is placed shall be in all cases installed at right angles to the line of the gate in its closed position.

F. Non-motorized Gates: Stops shall be provided for holding gates in an open position. The stop for engaging the plunger-bar latch shall be set in concrete. Keepers shall be located to support the free end of the gate in the full open position.

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3.6 ADJUSTING

A. Gate: Adjust gate to operate smoothly, easily, and quietly, free from binding, warp, excessive deflection, distortion, nonalignment, misplacement, disruption, or malfunction, throughout entire operational range. Confirm that latches and locks engage accurately and securely without forcing or binding.

B. Automatic Gate Operator: Energize circuits to electrical equipment and devices. Adjust operators, controls, safety devices, and limit switches.

1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation. Test controls and safeties. Remove damaged and malfunctioning units, replace with new units, and retest.

C. Lubricate hardware, gate operator and other moving parts.

3.7 DEMONSTRATION

A. Engage a factory-authorized service representative to train FAA's personnel to adjust, operate, and maintain gates.

1. Test and adjust operators and controls hardware, and other operable components.

Replace damaged or malfunctioning operable components.

2. Train FAA's personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and schedules.

3.8 CLEANING

A. The contractor shall clean the jobsite of excess materials; post hole excavations shall be scattered uniformly away from posts.

END OF SECTION 32 31 13

B. Field Measurements: Verify layout information for chain-link fences and gates shown on Drawings in relation to actual field conditions and existing structures and utilities. Verify dimensions by field measurements.

2. Coat selvage ends of fabric that is metallic coated during the weaving process with manufacturer's standard clear protective coating.

B. Selvage: Twisted and barbed finish at top and bottom selvage.

D. Extended Members: Extend end and corner posts above top of chain-link fabric 12 inches as required to attach barbed wire assemblies.

B. Galvanize, gage indicated on Drawings, coiled spring wire, provided within the bottom 4 inches of the fabric. Zinc coating shall weight 1.6 ounces per square foot minimum. Attach to fence fabric as indicated on Contract Drawings. Crimp rings tig...

B. Proceed with installation only after unsatisfactory conditions have been corrected.

C. Lubricate hardware, gate operator and other moving parts.