323113_-_Rev2_-_CHAIN_LINK_FENCES_AND_GATES.DOC

SECTION 323113

CHAIN LINK FENCES AND GATES

PART 1 - GENERAL

1.1

RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to work of this section.

1.2

SUMMARY

A. Section Includes: Chain link fabric with galvanized steel framework and accessories for commercial or industrial applications.

1. Fencing, framework and accessories

2. Swing Gates, framework and accessories

3. Privacy slats

1.3

REFERENCES

A. Comply with the following standards unless noted otherwise. If conflicts between specifications occur, the most stringent shall apply.

ASTM A120 – Pipe, steel, Black and Hot-Dipped Zinc Coated (Galvanized) Welded and Seamless, for Ordinary Use.4 ASTM A123 – Zinc (Hot Dipped Galvanized) Coatings on Iron and Steel Products.

ASTM A153 – Zinc-Coated (Hot-Dip) on Iron and Steel ASTM A392-71a – Top and Bottom Knuckled Selvage Chain Link Fabric ASTM A780 - Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM D7803 – Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Powder Coating

ASTM F567 – Practice for Installation of Chain Link Fence

ASTM F626 – Fence Fittings

ASTM F1043 – Strength and Protective Coatings on Steel Industrial Chain Link Fence Framework

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

ASTM F1664 – PVC and Other Conforming Organic Polymer-Coated Steel Tension Wire

CLFMI WLG2445 – Chain Link Fence Wind Load Guide for the Selection of Line Post and Line Post Spacing 1.4

ACTION SUBMITTALS

A. See Section 01 33 23 – Submittal Procedures, for submittal procedures.

B. Product Data: For each type of product include manufacturer’s catalog cuts indicating material compliance and specified options prior to installation.

C. Submit Shop Drawings: Include plans, elevations, layout of fences and gates with dimensions, post sizes, mesh size, details and finishes of components, accessories, and post foundations.

1. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for the following:

i. Fence and gate posts, rails, and fittings.

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

iii. Accessories: Privacy slats and Barbed wire.

D. Samples for Initial Selection: For each type of factory-applied finish.

E. Samples for Verification: For each type of component with factory-applied finish.

1.5

INFORMATIONAL SUBMITTALS

Coordinate "Qualification Data" Paragraph below with qualification requirements in Section 014000 "Quality Requirements" and as may be supplemented in "Quality Assurance" Article.

A. Qualification Data: For professional engineer.

Retain "Product Certificates" Paragraph below to require submittal of product certificates from manufacturers.

B. Product Certificates: For each type of chain-link fence and gate.

C. Product Test Reports: For framework strength according to ASTM F1043, for tests performed by a qualified testing agency.

Retain "Field quality-control reports" Paragraph below if Contractor is responsible for field quality-control testing and inspecting.

D. Field quality-control reports.

1.6

QUALITY ASSURANCE

A. The Contractor shall provide laborers and supervisors who are thoroughly familiar with the type of construction involved and materials and techniques specified.

B. Tolerances: ASTM current specifications and tolerances apply and supersede any conflicting tolerance.

C. Mockups: Build mockups to set quality standards for fabrication and installation.

1. Build mockup for typical chain-link fence and gate, including accessories.

i. Size: 10-foot (3 m) length of fence.

1.7

PRODUCT HANDLING AND STORAGE

A. Upon receipt at the job site, all materials shall be checked to ensure that no damage occurred during shipping or handling.

B. Materials shall be stored in such a manner to ensure proper ventilation and drainage and to protect against damage, weather, vandalism and theft.

1.8

SITE CONDITIONS

A. Protection of Monuments: Locate, protect and maintain benchmarks, monuments, control points and project engineering reference points. Re-establish disturbed or destroyed items at the Contractor’s expense.

B. Site Drainage and Dust: The Contractor shall maintain positive drainage into all existing drainage ways. The project area shall be graded to smooth all uneven fill areas. Control dust caused by the work. Dampen surfaces as required.

C. Site Access: The Contractor shall access the project site at locations designated by the Contracting Officer. No heavy trucks are allowed in existing areas to be preserved.

D. The Contractor shall verify areas to receive fencing are completed to final grade.

E. Field Measurements: Verify layout information for chain-link fences and gates shown on Drawings in relation to property survey and existing structures. Verify dimensions by field measurements.

PART 2 - PRODUCTS

2.1

GENERAL

A. All fence materials shall meet the minimum requirements established by the Chain Link Fence Manufacturers Institute.

B. All fencing, accessories and framework, Hot-Dipped Zinc Coated (Galvanized) chain link fabric with Hot-Dipped Zinc Coated (Galvanized) galvanized steel framework and accessories for commercial or industrial applications. Master Halco, Inc, (800) 229-5615, or approved equal.

C. Obtain chain link system, framework, fabric, fittings, gates and accessories from a single source.

2.3 CHAIN LINK FENCING – 6’ Overall Height.

A. Terminal Posts: 4” OD, round steel pipe Schedule 40, 60” Set – 12” diameter hole, fully encased in concrete, 3,000 psi. Stainless Steel Galvanized Steel. Type A: Not less than minimum 2.0-oz./sq. ft. (0.61-kg/sq. m) average zinc coating according to ASTM A123/A123M.

B. Line Posts: 2-7/8” OD, round steel pipe Schedule 40, 60” Set – 12” diameter hold, fully encased in concrete, 3,000 psi. Stainless Steel Galvanized Steel. Type A: Not less than minimum 2.0-oz./sq. ft. (0.61-kg/sq. m) average zinc coating according to ASTM A123/A123M.

C. Top/Middle & Bottom Rail: 1-5/8” OD, round steel pipe Schedule 40. Line tops for top rail, line and end rail clamps for middle and bottom rails. Stainless Steel Galvanized Steel. Type A: Not less than minimum 2.0-oz./sq. ft. (0.61-kg/sq. m) average zinc coating according to ASTM A123/A123M.

D. Fabric:

a. Provide fabric in one-piece heights measured between top and bottom of outer edge of selvage knuckle or twist according to "CLFMI Product Manual".

b. 6’ height, 9-gauge, 1” 2” mesh, top selvage twisted, bottom selvage knuckled, stainless steel galvanized steel chain link fabric. Zinc-Coated Fabric: ASTM A392, Type II, Class 1, 1.2 oz./sq. ft. (366 g/sq. m) with zinc coating applied after weaving.

c. Coat selvage ends of metallic-coated fabric before the weaving process with manufacturer’s standard clear protective coating.

E. Fittings:

a. Provide fittings according to ASTM F626.

b. All fittings, moveable parts, nuts and bolts to be stainless steel to match fabric and framework.

c. Metallic Coating for Pressed Steel or Cast Iron: Not less than 1.2 oz./sq. ft. (366 g/sq. m) of zinc.

F. Post caps: stainless steel galvanized steel, weather tight closure cap for tubular posts. Provide one cap for each post. Provide line post loop tops to secure top rail.

G. Rail and Brace ends: stainless steel, for connection of rails to post using a brace band for each gate, corner, pull and end post.

H. Wire ties: General, according to ASTM F626, 9 gauge (0.148”) (3.76 mm) stainless steel galvanized steel wire for attachment of fabric to line posts and rails. Pre-formed hog ring ties to be 9 gauge (0.148”) (3.76 mm) stainless steel galvanized steel for attachment of fabric to tension wire. Tie wire and hog rings stainless steel galvanized steel.

I. Tension (stretcher) bars: stainless steel galvanized steel, metallic-coated steel wire, marcelled tension wire according to ASTM A817 or ASTM A824, one piece length equal to 2 inches (50 mm) less than full height of fabric with a minimum cross-section of 3/16” x 3/4” (4.76 mm x 19 mm) per ASTM F626. Provide tension (stretcher) bars where chain link fabric is secured to the terminal post. Type II: Zinc coated (galvanized) by hot-dip process, with the following minimum coating weight: Matching chain-link fabric coating weight.

J. Brace and tension (stretcher bar) bands: round stainless steel galvanized steel 9 gauge. Secure bands using minimum 5/16” (7.94 mm) stainless steel galvanized steel carriage bolt and nut.

K. Truss rod assembly: stainless steel hot-dip galvanized after threading minimum 5/16” (7.9mm) diameter truss rod with pressed steel tightener, in accordance with ASTM F626.

L. Barbed Wire Arms: Pressed steel, with clips, slots, or other means for attaching strands of barbed wire, and integral with post cap, for each post unless otherwise indicated, and as follows:

1. Provide line posts with arms that accommodate top rail or tension wire.

2. Provide corner arms at fence corner posts unless extended posts are indicated.

3. Single-Arm Type: Type I, slanted arm.

2.4

CHAIN LINK SWING GATES, DOUBLE AND SING LEAF

A. General: ASTM F900 for gate posts, and single and double swing gate types.

B. Dimensions: 12’ and 24’ opening by 6’ ft. height

C. Fabric, Fittings, Barbed Wire, Privacy Slats: to match Chain Link Fencing.

D. Frame: Welded construction, material, protective coating and finish to match Chain Link Fencing framework. Exterior members to be 1.900” (48.3 mm) OD pipe, interior members when required shall be 1.660” (42.2 mm) OD pipe. Steel pipe to be Grade 2 ASTM F1043 Group IC per section 2.03. Frame members spaced no greater than 8 ft. (2440 mm) apart vertically and horizontally. Chain link fabric to match specification of fence system. Fabric to be stretched tightly and secured to vertical outer frame members using tension bar and tension bands spaced 12” (304.8 mm) on center and tied to the horizontal and interior members 12” (304.8 mm) on center using 9 gauge galvanized steel ties per section 2.04.

E. Hinges, stainless steel hot-dipped galvanized steel heavy gauge pressed steel or malleable iron, structurally capable of supporting gate leaf and allow opening and closing without binding. Non-lift-off type hinge design shall permit gate to swing 180° (3.14 rad). Swing direction as approved by Contracting Officer.

F. Latch: Permitting operation from both sides of gate with provision for padlocking accessible from both sides of gate.

G. Gate Posts: 4” OD, round stainless steel galvanized steel Schedule 40, 60” Set – 12” diameter hole, fully encased in concrete, 3,000 psi. Type A: Not less than minimum 2.0-oz./sq. ft. (0.61-kg/sq. m) average zinc coating according to ASTM A123/A123M.

H. Lock, padlock or chain as directed by Contracting Officer.

2.5 PRIVACY SLATS

Retain "Fiber-Glass-Reinforced Plastic Slats," "Tubular Polyethylene Slats," "Aluminum Slats," "Redwood Slats," or "Hedge-Type Slats" Paragraph below; insert other types to suit Project. If more than one material is required, indicate location of each on Drawings or by inserts. Consider the effect of privacy slats on wind and snow loads. Coordinate selection of material with direction of slat installation retained in Part 3.

E. Fiber-Glass-Reinforced Plastic Slats: UV-light-stabilized fiber-glass-reinforced plastic, not less than 0.06 inch (1.5 mm) thick, sized to fit mesh specified for direction indicated.

Retain "Color" Paragraph below only if material retained has a color selection option. If more than one color is required, indicate location of each on Drawings or by inserts.

F. Color: Reddish brown, as directed by the Contracting Officer. Contractor to provide color samples for approval by Contracting Officer.

2.6

BARBED WIRE

Barbed wire descriptions in "Steel Barbed Wire" and "Polymer-Coated, Galvanized-Steel Barbed Wire" paragraphs below are examples; revise to suit Project. If retaining this article, coordinate with components for barbed wire installation, including barbed wire arms in "Fittings" Article.

G. Steel Barbed Wire: ASTM A121, three-strand barbed wire, 0.099-inch- (2.51-mm-) diameter line wire with 0.080-inch- (2.03-mm-) diameter, four-point round barbs spaced not more than 5 inches (127 mm) o.c.

Barbs are not polymer coated.

PART 3 - EXECUTION

3.1

EXAMINATION

A. Examine the site for conditions that might preclude layout of fence as designed. Make field measurements and verify locations before installation. Contractor shall stake location of any utility lines. Failure to do so shall result in Contractor absorbing the cost of all repairs necessitated by damage to utility lines.

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

3.2

INSTALLATION

C. Stake locations of fence lines, gates, and terminal posts. Do not exceed intervals of 500 feet (152 m) or line of sight between stakes. Indicate locations of utilities, lawn sprinkler system, underground structures, benchmarks, and property monuments.

D. Install framework, fabric, accessories and gates in accordance with recommendations of the Chain Link Fence Manufacturers Institute, ASTM F567 and more stringent requirements specified.

E. Workmanship: The complete fence shall be plumb, both in line and transverse to the fence, straight and rigid with fabric tightly stretched and held firmly in place. Install fencing with bottom of fabric flush with grade. Details of construction, not specified shall be performed in keeping with good standard fencing and barbed wire practice.

F. Concrete: Set all posts in concrete, designed to have a minimum compressive strength of 3000 PSI at 28 days. Allow all posts to set at least seven days before top rails, center rails, wire fabric and fittings are installed.

G. Terminal Posts: locate terminal posts at each fence termination and change in horizontal or vertical direction. Space between terminal post and line post not more than 10’ apart. Set in concrete 60” deep and not less than 12” in diameter. All posts to be vertical and plumb.

H. Line Posts: Space line posts uniformly, not more than 10’ apart. Set in concrete 60” deep and not less than 12” in diameter. All posts to be vertical and plumb.

I. Top Rails: Install in lengths of 21’. Connect ends with sleeves forming a rigid connection, allow for expansion and contraction.

J. Check each post for vertical and top alignment, and maintain in position during placement and finishing operations.

K. Rails: Set rails as nearly parallel to finish grade as possible and at the specified height shown on the Drawings.

L. Center Rails: Install mid rails between line posts and attach to post using rail end or line rail clamps.

M. Bracing: Install horizontal brace and truss assembly at mid-height or above for fences 6’ and over at each fabric connection to the terminal post. The diagonal truss rod is installed at the point where the brace rail is attached to the terminal post and diagonally down to the bottom of the adjacent line post. Place the truss rod in tension by adjusting the turnbuckle.

N. Bottom Rails: Install bottom rails between posts and attach to post using rail end or line rail clamps.

O. Fabric: Fabric shall be full height as shown on details. Where applicable, all fabric shall be attached to outside of the building area of the fence line with the ties spaced at 1-foot intervals (Maximum) on all posts and 2-foot intervals (maximum) on all rails, with no sharp ends projecting. Selvages shall be twisted top and knuckled bottom throughout, as detailed. Fabric shall be tightly stretched and securely fastened with fittings and accessories provided by the manufacturer. Minimum width of fabric on fences over six feet (6’) in height shall be eight feet (8’). Fabric on high fences shall lap or splice only at intermediate rails. All fabric shall be in contact with top of mowing strips – no gaps allowed.

P. Fasten fabric to top rail, line post, braces and bottom tension wire/bottom rail with tie wire at maximum 12” on center.

Q. Attach fabric to end, corner and gate posts with tension bars and tension bar clips. The tension bars shall be of lengths two inches (2”) less than the full height of the fabric with which they are to be used. Bars shall be attached to the fabric by threading through the fabric, by bands or other mechanical means, and installed at all terminal or corner posts and gate posts.

R. Install gate fabric to match fence installation.

S. Replacement of damaged materials will be as directed by the Contracting Officer, at the Contractor’s expense.

3.3

TOLERANCES:

A. Variation from plumb: ¼” in 6 feet (1/2” maximum overall).

B. Variation in line of posts: ¼” in 20 feet horizontal (1/2” maximum overall).

C. Gates: Adjust gates to operate smoothly, easily, and quietly, free of 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.

3.4

CLEAN UP

A. Maintain a neat and orderly work site at all times.

B. Upon completion of site work, clean up area, remove tools, equipment, materials and debris.

END OF SECTION

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JEMEZ DISTRICT OFFICE

323113-1

JEMEZ DISTRICT OFFICE

323113-8