SECTION 32 31 13 – CHAIN LINK FENCES AND GATES - pbsd

SECTION 32 31 13 ¨C CHAIN LINK FENCES

PART 1 ¨C GENERAL

1.1

SUMMARY

A. This Section includes:

1. Galvanized fence framework, fabric, and accessories.

2. Excavation for post bases, and concrete for post footings.

3. Related hardware.

1.2

REFERENCE STANDARDS

A. Chain Link Fence Manufacturers Institute (CLFMI), latest edition:

1. CLFMI ¨C Voluntary Standard for Chain Link Fence Installation.

B. American Society for Testing and Materials (ASTM), latest edition:

1. ASTM A90 ¨C Testing for Weight of Coating on Zinc-Content (Galvanized) Iron on

Steel Articles.

2. ASTM A153 ¨C Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

3. ASTM A569 ¨C Steel, Carbon (0.15 Max. Percent) Hot-Rolled Sheet and Strip,

Commercial Quality.

4. ASTM A817 ¨C Metallic-Coated Sheet Wire for Chain Link Fence Fabric.

5. ASTM B6 ¨C Specification for Zinc (Slab Zinc).

6. ASTM C31/C31M Making and Curing Concrete Test Specimens in the Field.

7. ASTM C39/C39M Compressive Strength of Cylindrical Concrete Specimens.

8. ASTM C94 ¨C Ready-Mixed Concrete.

9. ASTM F567 ¨C Installation of Chain-Link Fence.

10. ASTM F626 ¨C Fence Fittings.

11. ASTM F1083 ¨C Pipe, Steel, Hot-Dipped Zinc-Coated (Galvanized) Welded for Fence

Structures.

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C. American Concrete Institute (ACI), latest edition

1. ACI 306 ¡°Cold Weather Concreting¡±.

2. ACI 306.1 ¡°Standard Specification for Cold Weather Concreting¡±

D. American Iron and Steel Institute (AISI), latest edition:

1. AISI T430 ¨C Specification for Stainless Steel.

1.3

SUBMITTALS

A. Shop Drawings:

indicating:

Prior to fabrication and delivery, submit shop drawings clearly

1. Plan layout, spacing of components, post footing dimensions, gate components,

hardware anchorage, and schedule of components.

B. Product Data: Provide data on fabric, posts, accessories, fittings and hardware, including

recommended installation instruction and procedures.

C. Samples: Submit samples, 6-inches by 6-inches, of fabric material, and typical

accessories.

1.4

QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing and regularly engaged in the

domestic manufacture of fencing system with minimum of five years¡¯ experience.

B. Erector Qualifications: Company specializing in the erection of fencing system with

documented minimum three years¡¯ experience, and approved by fence manufacturer.

PART 2 ¨C PRODUCTS

2.1

MATERIALS

A. Framework Materials: Line, terminal and pull posts; top, middle, bottom rails or braces;

gate frame materials shall be one of the following:

1. Steel Pipe ¨C Schedule 40 pipe with 1.8 ounce per square foot zinc coating on both

inside and outside of all pipe, a minimum yield strength of 30,000 psi, conforming to

the ASTM F1083, Standard Specifications for Black and Hot-Dipped Zinc Coated

(Galvanized Welded and Seamless Steel Pipe for Ordinary Uses)

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2. Pipe shall be straight, true to section and conform to the following weights:

Pipe Size-Outside Diameter

Pipe Weight Lbs./Ft.

1-5/8 inches

2.27

4 Inches

9.11

6-5/8 inches

18.98

B. Fence Fabric Core Wire: Shall be good commercial quality steel core wire, zinc-coated

conforming to ASTM B6, with ASTM A817, Class 1, minimum of 1.2 ounces/sq.ft. of

surface area, tested in accordance with ASTM A90.D.

C. Fittings: ASTM F626; pressed steel or cast iron, hot-dipped galvanized with minimum of

1.2 ounces/sq.ft. of zinc coating of surface area, or aluminum alloy 360 die cast.

2.2

CHAIN LINK FABRIC

A. Fence Fabric: Height as indicated on drawings; one-piece width fabric.

1. Fabric:

a. Classification: CLFMI Light Industrial/Standard Residential.

b. Mesh Size: 2-inch, diamond.

c. Wire Gauge: 9 gauge; 0.148 inch.

2. Breaking Strength: 1,290 lbs.

3. Selvage: Both top and bottom selvages knuckled.

2.3

FRAMEWORK COMPONENTS

A. Framing: All steel parts shall be corrosion-protected as specified herein.

B. Fence Posts:

1. All fence posts shall be 4 inch outside diameter galvanized steel pipe.

2. The diameter of the foundation for the posts shall be as shown on the Construction

Drawings.

C. Rails and Braces: 1-5/8-inch.

2.4

ACCESSORIES

A. General: Shall conform to requirements of ASTM F626; galvanized to comply with

ASTM A153 (except tie wires and barb tape).

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B. Post Caps: Malleable steel, with provisions to permit passage of top rail, snug fitting on

post and exclude moisture from inner surface of post.

C. Fittings: Sleeves, rail ends, wire ties or clips, stretcher bars and brace bands, fasteners

and fittings, as required, finish to match fence system. Fasteners shall be inaccessible

from security side of fence.

D. Truss Rods: 0.375-inch diameter, galvanized steel and/or polymer (vinyl) coated.

E. Extension Arms: Galvanized or polymer coated ¡°V¡± type as specified, pressed steel,

complete with provision for anchorage.

1. Arms shall be capable of withstanding without failure, 250 lbs. downward pull at

outermost end of arm.

2. Arms shall have hole for passage of top rail with integral post top weather cap.

F. Nuts and Bolts: Shall be stainless steel and/or polymer (vinyl) coated, AISI T430.

G. Tie Wire: Shall be 9 gauge galvanized steel or polymer coated as specified.

H. Stretcher Bars: One-piece lengths equal to full height of fabric, with cross-section size as

recommended by manufacturer for gauge mesh used. On lower fabric only, provide one

stretcher bar for each gate and end post, and two for each corner and pull post, except

where fabric is integrally woven into post.

I. Stretcher Bar Bands: Space not over 15 inches o.c., to secure stretcher bars to end,

corner, pull end gate posts.

2.5

FINISHES

A. Zinc Coating: All steel parts shall be galvanized, by either the hot-dipped or electrolytic

process as specified herein.

B. Workmanship:

1. Weaving: Fabric shall be helically woven into a diamond mesh having parallel sides

and horizontal and vertical diagonals of approximately uniform dimensions.

Elongated mesh will not be permitted.

2. End Treatment: All cut ends of fence fabric shall be galvanized at the factory during

the weaving process.

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3. Process: Weaving shall not crack, craze, tear, or peel the galvanized coating.

2.6

CONCRETE

A. Concrete Mix: ASTM C94, normal Portland, air entrained cement with 3/4-inch

aggregate, mix materials to obtain minimum compression strength of 3,000 psi.

PART 3 ¨C EXECUTION

3.1

INSPECTION

A. Ensure that final grading in fence locations is complete without irregularities that would

interfere with fence installation.

B. Ensure that galvanized structural support framing is completed without irregularities that

would interfere with the overhead-suspended fabric installation.

C. Do not start work until conditions are satisfactory.

D. Do not place concrete in foundation borings that have free standing water, soft, spongy,

frozen, or otherwise unsuitable conditions.

3.2

PREPARATION

A. Measure and lay-out complete fence line.

B. Locate, mark and drill post holes for post footings in firm, undisturbed or compacted soil,

or bedrock. Maximum spacing of Posts: as indicated on the Construction Drawings.

C. Excavate hole depth to a minimum 6 inches deeper than post bottom, with bottom post

set in concrete for the full depth of the post, unless otherwise indicated.

3.3

INSTALLATION

A. Install framework, fabric, and accessories, as indicated on Construction Drawings and in

accordance with ASTM F567 requirements.

B. Provide terminal posts (end, and corner) at the beginning and end of each continuous

length of fence and at abrupt changes in vertical and horizontal direction of 20 degrees or

more.

C. Post Setting: Set posts in air entrained concrete around each post in continuous pour,

vibrate for consolidation, and check each post for vertical and top alignment.

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