Attachment_3-Specification_Section323113_ChainLink.Fence.Gates.docx

USDA FOREST SERVICE R-4

Flaming Gorge Ranger District Addition

SECTION 323113 - CHAIN-LINK FENCES AND GATES

GENERAL

SUMMARY

This Section includes the following:

Galvanized steel chain-link fabric.

Galvanized steel framework.

Vertical Pivot Gate Related Sections include the following:

Section 312000 "Earthwork" for filling and for grading work.

Section 260500 Common Work Results for Electrical Section 033020 "Concrete from Packaged Dry Mix for Minor Structures" for concrete equipment bases/pads for gate operators, drives, and controls and footings.

DEFINITIONS

CLFMI: Chain Link Fence Manufacturers Institute.

SUBMITTALS

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

Fence and gate posts, rails, and fittings.

Chain-link fabric, reinforcements, and attachments.

Vertical Pivot Gate.

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 and attachment and bracing. Approval of the Contracting Officer’s Representative must be received before ordering products.

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

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.

QUALITY ASSURANCE

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.

Source Limitations for Chain-Link Fences and Gates: Obtain each color, grade, finish, type, and variety of component for chain-link fences and gates from one source with resources to provide chain-link fences and gates of consistent quality in appearance and physical properties.

PROJECT CONDITIONS

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.

MEASUREMENT AND PAYMENT

Measurement shall be lump sum for all fencing and the automatic gate as shown on the plans.

PRODUCTS

Vertical Pivot Gate Model: Tilt-A-Way, HYJD-25A Vertical Pivot Gate as manufactured by Ideal Manufacturing; 2011 Harnish Blvd, Billings, Mt 59101. Toll Free Tel: (800) 523-3888. Fax (406)-656-4363 or an approved equal.

Options to include:

Cold Weather Package, Radio controls for stand open-close-stop commercial transmitter/ receiver system Loop Detectors: provide detector system (except loop) to allow free exit/safety, safety or close gate operation; system to be factory wired inside electrical box and tested.

Snow removal access door Ice scrapers (for cable sheaves) Access Control System.

Concrete Base and Footing: Concrete shall be in accordance with Section 033000.

CHAIN LINK FENCE FABRIC

Steel Chain-Link Fence Fabric: Height indicated on Drawings. Provide fabric fabricated in one-piece widths for fencing in height of 12 feet (3.6 m) and less. Comply with CLFMI's "Product Manual" and with requirements indicated below:

Mesh and Wire Size: Fabric 9 gauge wire with a uniform square mesh 2" +/- 1/8", coated with 0.30 oz/sq ft of zinc metal, coated with 7 mil PVC.

Class 2: Not less than 2 oz./sq. ft. of uncoated wire surface.

Selvage: Knuckled at both selvages.

INDUSTRIAL FENCE FRAMING

Round Steel Pipe: Heavy Industrial Strength, Schedule 40, galvanized steel pipe complying with ASTM F 1083. Posts and other appurtenances hot dipped galvanized with minimum zinc coating of 0.50 oz/sq ft and coated with 10 to 14 mil PVC. Comply with ASTM F 1043, Material Design Group IA, external and internal coating Type A; and the following strength and stiffness requirements:

Fence Height: for Security Fence 72” high .

End, Corner, and Gate Posts: for security fence 4” diameter.

Line, Pull Posts and Top Rail: 2.375” diameter.

Roll-Formed Steel Shapes: C-sections or other shape, produced from structural steel. Comply with ASTM F 1043, Material Design Group II, with minimum yield strength of 45,000 psi (310 MPa); and the following coating and strength and stiffness requirements:

Coating: Type A, consisting of not less than minimum 2.0-oz./sq. ft. (0.61-kg/sq. m) average zinc coating per ASTM A 123/A 123M.

Post Brace Rails: Match top rail for coating and strength and stiffness requirements. 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. Post brace rails shall comply with ASTM 1043.

Top Rails: Fabricate top rails 10 feet in length, with swedged-end or fabricated for expansion-type coupling, forming a continuous rail along top of chain-link fabric. Top rails shall comply with ASTM 1043.

FITTINGS

General: Provide fittings for a complete fence installation, including special fittings for corners. Comply with ASTM F 626.

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

Rail and Brace Ends: Hot-dip galvanized pressed steel or hot-dip galvanized cast iron. Provide rail ends or other means for attaching rails securely to each gate, corner, pull, and end post.

Rail Fittings: Provide the following:

Top Rail Sleeves: Hot-dip galvanized pressed steel or round steel tubing. Not less than 6 inches (153 mm) long.

Rail Clamps: Hot-dip galvanized pressed Tension and Brace Bands: Hot-dip galvanized pressed steel.

Tension Bars: Hot-dip galvanized steel, length not less than 2 inches (50 mm) shorter than full height of chain-link fabric. Provide one bar for each gate and end post, and two for each corner and pull post, unless fabric is integrally woven into post.

Pipe Sleeves: For posts set into concrete, provide preset hot-dip galvanized steel pipe sleeves complying with ASTM A 53, not less than 6 inches (150 mm) long with inside dimensions not less than 1/2 inch (13 mm) more than outside dimension of post, and flat steel plate forming bottom closure.

Truss Rod Assemblies: Hot-dip galvanized steel after threading rod and turnbuckle or other means of adjustment.

TENSION WIRE

Metallic-Coated Steel Wire: 0.177-inch diameter, marcelled tension wire complying with ASTM A 817 and ASTM A 824, with the following metallic coating:

Type II, zinc coated (galvanized) by hot-dip process, with the following minimum coating weight:

Matching chain-link fabric coating weight.

CONCRETE

According to Section 033020 "Concrete from Packaged Dry Mix for Minor Structures."

EXECUTION

EXAMINATION

Examine areas and conditions, with Installer present, for compliance with requirements for site clearing, earthwork, pavement work, and other conditions affecting performance.

Do not begin installation before final grading is completed, unless otherwise permitted by Contracting Officer’s Representative.

Proceed with installation only after unsatisfactory conditions have been corrected.

PREPARATION

Stake locations of fence lines, gates, and terminal posts. Indicate locations of utilities, lawn sprinkler system, underground structures, benchmarks, and property monuments.

GENERAL INSTALLATION

General: Install chain-link fencing to comply with ASTM F 567 and more stringent requirements specified.

Install fencing on established boundary lines inside property line.

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

Post Setting: Hand-excavate holes for post foundations in firm, undisturbed or compacted soil. Set gate 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. Using mechanical devices to set line posts per ASTM F 567 is permitted. 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.

Dimensions and Profile: As indicated on Drawings.

Exposed Concrete Footings: Extend concrete 2 inches (50 mm) above grade, smooth, and shape to shed water.

Posts Set into Concrete in Sleeves: Use steel pipe sleeves preset and anchored into concrete for installing posts. After posts have been inserted into sleeves, fill annular space between post and sleeve with nonshrink, nonmetallic grout, mixed and placed to comply with anchoring material manufacturer's written instructions, and finished sloped to drain water away from post.

Posts Set into Concrete in Voids: Form or core drill holes not less than 5 inches (125 mm) deep and 3/4 inch (20 mm) larger than OD of post. Clean holes of loose material, insert posts, and fill annular space between post and concrete with nonshrink, nonmetallic grout, mixed and placed to comply with anchoring material manufacturer's written instructions, and finished sloped to drain water away from post.

CHAIN-LINK FENCE INSTALLATION

Terminal Posts: Locate terminal end, corner, and gate posts per ASTM F 567 and terminal pull posts at changes in horizontal or vertical alignment of 30 degrees or more.

Line Posts: Space line posts uniformly at 10 feet on center.

Post Bracing Assemblies: Install according to ASTM F 567, 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 midheight of fabric on fences with top rail and at two-thirds fabric height on fences without top rail. Install so posts are plumb when diagonal rod is under proper tension.

Top Rail: Install according to ASTM F 567, 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.

Chain-Link Fabric: Apply fabric to outside of enclosing framework. Leave 2 inches (50 mm) 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.

Tension or Stretcher Bars: Thread through fabric and secure to end, corner, pull, and gate posts with tension bands spaced not more than 15 inches (380 mm) on center.

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 per ASTM F 626. Bend ends of wire to minimize hazard to individuals and clothing.

Maximum Spacing: Tie fabric to line posts 12 inches (304 mm) o.c. and to braces 24 inches (609 mm) on center.

GATE INSTALLATION

General: 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.

ADJUSTING

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.

END OF SECTION

February 2019

CHAIN-LINK FENCES AND GATES 323113 - 1