No. 24-F-2b:13

CITY OF PHILADELPHIA

PROCUREMENT DEPARTMENT Effective 07/1/13

STANDARDS DIVISION

SPECIFICATION

CHAIN LINK FENCING

MATERIALS, INSTALLATION AND REPAIRS

1. CLASSIFICATION AND SCOPE

This specification covers materials, installation and services necessary to complete the chain link fencing work as indicated on the attached drawings, tables and as described in the specifications below:

2. APPLICABLE SPECIFICATIONS

The latest applicable standards of the American Society for Testing and Materials (ASTM) in effect on the date of the Invitation and Bid shall form a part of this specification.

A.S.T.M. A-90, A-153, A-370, A-428, A-641; B-211, B-487, B-499; D-1499, D-1535, D-1729; E-8, E-18, E-376; G-155 or latest revision.

Federal Spec. #RR-F-191/1, #RR-F-191/3

Federal Spec. No. 595

MIL-T-704

3. REQUIREMENTS - For definitions of the various materials - see Paragraph 8 on page 38 of 40.

3.1 Chain-link Fence gates, shall be of the following types:

Type I - Single Swing

Type II - Double Swing

Type III - Single Cantilever Sliding, Wheel Sliding Gate

Type IV - Single Overhead Sliding

Type V - Double Overhead Sliding

Type VI - Vertical Lift

Type VII - Special

3.1.1 Design. Detailed construction requirements for all gates shall meet the applicable requirements of this specification. Gate frames shall be of welded construction or shall be assembled using fittings. When fittings are used as the construction method for gate frames, the frames shall be fitted with 5/16-inch minimum diameter truss rods. All gates shall be constructed so that they may be operated by one person.

Effective Date: 07/1/13

3.1.2 Color coating and material. When color coating is required the color shall match the color specified for chain-link fabric as cited in RR-F-191/1. Steel frames shall be zinc-coated prior to application of color coating. Unless otherwise specified, color coating material shall be at the option of the ordering agency.

3.1.3 Frames. Gate frames shall be constructed from applicable class, size, and grade members selected from RR-F-191/3 as specified.

3.1.3.1 Welded zinc-coated frames. When specified, the frames shall be zinc-coated by the hot dip or metal spray method after fabrication. When frames are not zinc-coated after fabrication the welds shall be coated with a zinc-rich paint.

3.1.3.2 Color-coated frames. When color-coated frames are required and the frames are of welded construction, all weld areas shall be finished with a suitable rust preventative coating and a matching color final coating.

3.1.4 Fabric. Gate fabric shall be selected from RR-F-191/1 and shall be of the type, size of mesh, gauge, size of wire, color and selvage as specified by ordering agency.

3.1.5 Barbed Wire Top. When barbed wire top is specified, the end members of gate frames shall extend 1 foot above the top horizontal section of the gate frame. Three strands of barbed wire uniformly spaced and shall be attached by bands, clips, or eyebolts.

3.1.6 Latches, hinges, stops, and keepers. Latches, hinges, stops, and keepers shall be zinc-coated steel or color-coated over zinc-coated steel, or aluminum-coated steel as specified.

When zinc-coating is required, the weight of zinc-coating shall be 1.2 ounces per square foot unless otherwise specified. When aluminum coating is required, the weight of aluminum-coating shall be not less than 0.40 ounces per square foot.

3.1.6.1 Single gate latches. Single gate latches shall be fork type, gravity drop bar type with positive locking features, or plunger bar type of full gate height as specified.

3.1.6.2 Double gate latches. Latches for double gates shall be fork type latch with center drop rod, or plunger bar type of full gate height arranged to engage the gate stop, or a positive locking gravity device as specified. Locking devices shall be constructed so that the center drop rod or plunger bar cannot be raised when locked.

3.1.6.3 Stops. Center gate stop shall be provided for all double gates and shall be suitable for setting in concrete or with anchors for the center drop rod or plunger.

3.1.6.4 Keepers. Keepers shall be provided for each gate leaf over 5 feet wide. Gate keepers shall consist of a mechanical device for securing the free end of the gate when in full operation.

3.1.6.5 Gate Hinges. Gate hinges shall be of adequate strength for the gate and shall have large bearing surfaces for clamping or bolting in position. Hinge action shall be such that gates may be easily opened and closed by one person. Hinges shall provide for full 180o swing of gate leaf.

3.1.7 Rollers. Rollers shall be equipped with bearings. Non-sealed type bearings shall be provided with a grease fitting for periodical maintenance. Rollers shall be secured to the gate post or gate frame without welding.

3.2 Posts and accessories shall be of the following types and styles:

Type I -Posts

Style I -T Section

2 -U Section

3 -Angle Section

Type II -Accessories

Style 4 -Stays

5 -Fasteners

6 -Gates

Type III -Special

3.2.1 Material.

3.2.1.1 Type I, posts. Posts shall be hot-rolled steel or re-rolled rail steel.

3.2.1.2 Type II, accessories.

3.2.1.2.1 Styles 4 and 5, stays and fasteners. Stays and wire fasteners shall be formed from galvanized steel wire.

3.2.1.2.2 Style 6, gates. Fabric for gates shall be woven steel wire. Gates frames shall be tubular steel, formed steel or rolled steel. Fittings including hinges and latches for gates shall be cast iron or malleable iron, or formed from steel strip or slit sheet.

3.2.2 Types I and II, Chemical composition. Unless otherwise specified, chemical composition of posts and accessories shall be at the manufacturer's option.

3.2.2.1 Type I, posts.

3.2.2.2 Styles I, 2 and 3.

3.2.2.2.1 Yield, tensile strengths, and hardness.

Unless otherwise specified, posts shall have a minimum yield strength of 50,000 p.s.i. and a minimum tensile strength of 80,000 p.s.i. or have either a minimum hardness of 156 Brinell or 83 Rockwell B.

3.2.2.2.2 Weight of Posts. Unless otherwise specified, the weight of the as-rolled posts, prior to painting or galvanizing, shall be as follows:

Style Weight of posts (Pounds per foot)

1 1.33

2 1.12 or 1.33

3 4.10 upright members

3 3.19 bracing members

Tolerance on weight of as-rolled shall be plus or minus 5 percent.

3.2.2.2.3 Dimensions.

3.2.2.2.3.1 Cross-sectional dimension. Unless otherwise

specified, the nominal cross-sectional dimensions for styles 1, 2 and 3 posts shall be as follows:

STYLE CROSS-SECTION (INCHES) THICKNESS (INCH)

1 1-3/8 wide, 1-3/8 depth 1/8

2 1.12 lb/ft 2 by 1-1/8 3/32

2.1.33 lb/ft 2 by 1-1/4 3/32

3 Upright 2-1/2 by 2-1/2 1/4

3 Bracing 2 by 2 1/4

3.2.2.2.4 Length of posts. Unless otherwise specified, posts shall be of the following lengths with a tolerance of minus 1 inch, plus 2 inches.

Style 1 - 5, 5-1/2, 6, 6-1/2, 7, 8, or 10 feet.

Style 2 - 5, 5-1/2, 6, 6-1/2, 7, 7-1/2, or 8 feet.

Style 3 - 7, 8 or 9 feet, uprights and braces.

3.2.2.2.5 Surface finish. All posts shall be zinc-coated, painted, or unpainted as specified.

3.2.2.2.6 Zinc coat. When specified, posts shall galvanized in accordance with ASTM A 123 or A 153 as applicable.

3.2.2.2.7 Paint Coat. Cleaning treatment and painting shall be in accordance with MIL-T-704, type A for two coats or type C for one coat.

Coating shall be weather resisting paint or enamel baked-on or air dried. Paint color shall be as specified. When specified, paint color shall be in accordance with Fed. Std. No. 595. Unless otherwise specified, thickness of paint shall be at manufacturer's option.

3.2.2.2.8 Reflective tops. When specified, reflective tops shall be furnished.

Unless otherwise specified, the color and length of the reflective portion shall be at the ordering agency's option.

3.2.2.3 Styles 1 and 2.

3.2.2.3.1 Style 1, T-section posts. T-section posts shall have studs placed and constructed to engage a substantial number of fence line wires in proper position. The distance between studs shall not be greater than 3 inches.

3.2.2.3.2 Style 2, U-section posts. U-section posts shall have corrugations, punched tabs, notches, holes, knobs, or studs, as specified, and so placed and constructed as to engage a substantial number of fence line wires in proper position.

3.2.2.3.2.1 - Anchors. Unless otherwise specified, each style 1 and 2 post shall have a steel anchor plate 18 square inches minimum in area and weighing not less than 0.67 pounds, securely fastened to the post. Design and placement of anchor shall be shown in Figure 3.

3.2.2.4 Style 3, angle-section posts and braces. One angle brace shall be furnished with each end or gate post, and two angle braces shall be furnished with each intermediate brace or corner post, complete with zinc-coated hardware for assembly. When specified, hardware including bolts and nuts shall be galvanized (zinc-coated) in accordance with ASTM A 153 or A123.

3.2.2.5 Type II, accessories.

3.2.2.5.1 Style 4, stays. Stays shall be 9-1/2 gauge, zinc-coated twisted wire designed for a screw-on type installation. The wires shall be zinc-coated in accordance with ASTM A641, Class 1 or Class 3, as specified. Length of stays shall be 24 to 60 inches in 2 inch increments, as specified.

3.2.2.5.2 Style 5, fasteners. Wire fasteners shall be formed from zinc-coated wire, 12-1/2 gauge or coarser, as specified. The wire shall be zinc-coated in accordance with ASTM A641, Class 1 or Class 3, as

3.2.2.5.3 T-Section posts. Unless otherwise specified, fasteners shall be designed for use with T-section posts, size 1-3/8 inches by 1-3/8 inches by 1/8 inch thick. Each end of the fastener shall be bent and twisted up or to the side. The fastener shall be easily installed with ordinary pliers.

3.2.2.5.4 Style 6, gates - The style of woven wire and design including dimensions of gates and gate accessories shall be as specified.

Unless otherwise specified, fittings which include latches shall be provided for gates and gate posts. Gate frames and hardware shall be zinc-coated in accordance with ASTM-A53/53M of A153, as applicable.

3.2.2.5.5 Type III, special. This type of posts and accessories is defined as any type which does not fall within the other type classifications of this specification, but the materials, workmanship and quality shall meet the applicable provisions of this specification.

3.2.2.5.6 Workmanship. Zinc-coated posts and accessories shall be free of bruised or scaled coating, listers and uncoated areas. Painted posts and accessories shall be free from cracks, peeling, chipped paint, and uncoated areas.

3.3 The chain-link fabric shall be of the following types, mesh sizes, wire gauge size and fabric height:

Type I -Zinc-coated steel

Type II -Aluminum-coated steel

Type III -Aluminum alloy.

Type IV -Polyvinyl chloride (PVC) coated over zinc or aluminum coated steel.

Mesh size in inches:

1 inch (9 and 11 wire gauge size only)

1-3/4 inch (all wire gauge sizes)

2-inch (all wire gauge sizes).

2-1/8 inch (all wire gauge sizes).

Wire gauge size - outside diameter of metal wire in inches:

11 gauge = 0.120 inches

9 gauge = 0.148 inches

6 gauge = 0.192 inches

Fabric height in inches:

36 inches

42 inches

48 inches

60 inches

72 inches

84 inches

96 inches

120 inches

144 inches

3.3.1 Fabric. The chain-link fence shall be helically woven into a diamond mesh. Fabric shall be woven from the type of wire, mesh size and wire gauge size, and to the height selected

(see 3.3).

3.3.2 Steel wire. Unless otherwise specified, the steel wire for the fabric shall be of such quality and purity that, when drawn to the wire gauge size specified, the wire shall have a minimum tensile strength of 75,000 pounds per square inch when tested.

3.3.3 Wire gauge size. Wire for fabric shall be of the wire gauge size selected (see 3.3). The outside diameter cited in 3.3, is the metal wire diameter allowable for that wire gauge size and includes the metallic coating. When type IV wire is required, the wire gauge size shall be that of the wire only, the PV coating shall not be considered when determining wire size. Tolerance for wire size is + 0.005 inches.

3.3.4 Type I, zinc-coated steel wire. Unless otherwise specified, the minimum weight of coating on the wire shall be 1.2 ounces of zinc per square foot of coated surface area.

3.3.5 Type II, aluminum-coated steel wire - The minimum weight of aluminum coating for 6 or

9 gauge wire shall be 0.40 ounces per square foot. The minimum weight of aluminum coating for 11-gauge wire shall be .035 ounces per square foot.

3.3.6 Type III, aluminum alloy wire. The aluminum wire shall conform to the requirements of

ASTM B211, alloy 6061-T94.

3.3.7 Type IV, PVC coated over zinc or aluminum coated steel wire.

The PVC coating shall meet the requirements of 3.6.1 thru 3.6.8. Minimum thickness of the PVC coating shall be 0.007 inches. Unless otherwise specified, the method of applying the PVC coating shall be the using ordering agency's option. Minimum weight of zinc coating on the steel wire shall be 0.4 ounces per square foot for 6 gauge and 0.3 ounces per square foot for 9 and 11 gauge. Aluminum coated steel wire shall meet the requirements of 3.3.5.

3.3.7.1 PVC-coated fabric - There are different PVC-coated fabrics on the market.

Some of the ways in which they may vary are: The methods of applying the PVC coating, wall thickness of the PVC coating, adhesion of the PVC coating to the wire, and cost. These factors should be taken into consideration when selecting a fence fabric for different environmental applications.

3.3.7.2 Color of PVC-coated wire. The color of PVC-coated wire shall be one of the standard colors cited in Table I as specified. When colors not cited in Table I are required, the color shall be as specified.

TABLE I. Color of PVC Coated Fabric Wire

Munsell Units (ASTM D1535 and D1729)

Medium Green Dark Green Black

Hue 7,5G to 2.5BG 0.1G to 10G See Chrome Tolerance

Value 3.5 to 4.5 2.3 to 3.3 1.3 to 2.1

Chrome Greater than 6 1 to 5 Max/0.5 (Any Hue)

3.3.7.3 Weaveability of PVC-coated wire. PVC-coated wire shall be capable of being woven into fabric without the PVC coating cracking, crazing, or peeling.

3.3.7.4 Accelerated aging of PVC-coatings. PVC coatings shall not shrink more than

1/16 inch per foot of length, demonstrate a significant visual change in color or gloss, or exhibit breaks, cracks, crazing, crumbling, or other visual forms of failure.

3.3.7.5 Flexibility of PVC -coating. PVC coating shall demonstrate flexibility by exhibiting no breaks, cracks, crazing, crumbling, or other visual forms of failure of the coating when tested.

3.3.8 Mesh Size. The mesh size for fabric shall be one of the sizes selected (see 3.3). The mesh size shall be the inside measurement of the diamond shape of the tensioned fabric.

Tolerance for mesh size is + 1/8 of an inch.

3.3.9 Diamond Count. Unless otherwise specified, the diamond count shall be the manufacturer's standard. All diamond counts shall be consistent within a lot.

3.3.10 Salvage. Unless otherwise specified, the fabric will be furnished with a standard selvages as follows:

a. Fabric up to and including 60 inches high with 2-inch mesh shall be knuckled at the top and bottom selvages.

b. Fabric over 60 inches high with 2-inch mesh shall be twisted and barbed on the top selvage and knuckled on the bottom selvage.

c. Fabric of all heights with 1-inch or 1-3/4 inch mesh shall be knuckled at the top and bottom selvages.

3.3.10.1 Knuckled. Loops of knuckled selvage shall be closed or nearly closed with a space not exceeding the diameter of the wire.

3.3.10.2 Twisted and Barbed. Wire shall be twisted in a closed helix of 1-1/2 machine turns equivalent to three full twists, and cut at an angle to provide sharp barbs.

The wire ends beyond the twist shall be at least 1/4 inch long.

3.3.11 Fabric Height: Fabric height shall be of that selected + inch (see 3.3).

3.3.12 Fabric Length. Unless otherwise specified, the standard length of fabric roll shall be 50 linear feet + 1 percent. Each roll of fabric shall be one-piece length.

3.4 INDUSTRIAL WIRE FABRIC

3.4.1 Types and Classes. Industrial wire cloth shall be of the following types and classes as specified (see 3.4.5)

Type I - Square Mesh

Type II - Rectangular (off count) mesh

Type III - Space cloth, square openings

Type IV - Space cloth, rectangular openings

Type V - Intermediate or multiple crimp

Type VI - Filter screen

Classes

Class I - Plain weave

Class 2 - Twilled weave

3.4.2 Materials - The cloth shall be of the following composition as specified:

Steel; low carbon, plain commercial finish.

Steel; high carbon (spring temper), plain commercial finish

Steel; high carbon, oil (spring) tempered plain commercial finish.

Steel; low carbon, galvanized before weaving

Steel; low carbon, hot galvanized after weaving

Steel; low carbon, electro-galvanized after weaving

Steel; stainless; types 302, 304, 316, 347 and 430

Brass; high-zinc content (70 percent copper and 30 percent zinc).

Brass; low-zinc content (80) percent copper and 20 percent zinc).

Copper-zinc alloy; "Commercial Bronze" - (90 percent copper and

10 percent zinc).

Cooper; commercially pure.

Monel; nickel-copper alloy.

Nickel; commercially pure

Aluminum; type 5056 alloy

Aluminum; type 1100 alloy

Bronze, phosphor; (minimum tin content 4.5 percent).

Bronze, phosphor; (type VI only) (tin content 3.0 - 10.0 percent, Phosphorous 0.05 - 0.5 percent, other elements 0.05

Percent each, maximum.

3.4.3 Finish, steel wires. The finish for steel wires used in the industrial wire cloth shall be either plain commercial finish, hot galvanized after weaving, electro-galvanized after weaving, or galvanized before weaving as specified.

3.4.3.1 Galvanized-before-woven steel wire cloth. Galvanized-before-woven-steel wire cloth shall be made of wire which has been commercially coated with zinc before it is woven.

3.4.3.2 Galvanized-after-woven steel wire cloth. Galvanized-after-woven steel wire cloth shall be coated, by either the hot-dip or the electrolytic process, with zinc of at least 98 percent commercial purity after the cloth had been woven, as

3.4.4 Mesh, space, and wire size. Industrial wire cloth shall be of the mesh size; or space openings in the case of cloth of types III and IV; and wire sizes (diameters) as specified.

3.4.4.1 Type I, Class I. Whenever possible, mesh size and wire size (diameter) shall be selected from Table I or II and is commercially available as follows:

a. Carbon Steel - 60 by 60 mesh.

b. Brass - 120 by 120 mesh.

c. Cooper - 100 by 100 mesh.

d. Monel - 200 by 200 mesh.

e. Nickel - 250 by 250 mesh.

f. Stainless Steel - 325 by 325 mesh.

3.4.4.2 Type I, Class 2. Whenever possible, mesh size and wire size (diameter) shall be selected from Table I or II, and is commercially available as follows:

a. Brass - 120 by 120 mesh.

b. Phosphor Bronze - 325 by 325 mesh.

c. Cooper - 100 by 100 mesh.

d. Monel - 200 by 200 mesh.

e. Nickel - 250 by 250 mesh.

f. Stainless Steel - 325 x 325 mesh.

3.4.4.3 Type II, Classes I and 2. Mesh size and wire size (diameter) shall be as specified.

Vendors should be consulted as to practical combination of wire diameters and meshes.

3.4.4.4 Type III. Whenever possible, space openings and wire size (diameter) shall be selected from Table III, and is usually made in carbon steel, either plain or galvanized, monel metal, and stainless steel; also made in other metals listed in

3.4.3.

3.4.4.5 Type IV. Space openings and wire size (diameter) shall be as specified. Vendors should be consulted as to practical combinations of wire diameters and meshes.

TABLE I. Type I mesh cloth, sizes most frequently produced for general use.

Wire Open Wire Open

Mesh Diameter Opening Area Mesh Diameter Opening Area

Inch Inch Percent Inch Inch Percent

1 x 1 0.08 0.092 84.6 24 x 24 0.014 0.0277 44.2

2 x 2 0.063 0.437 76.4 24 x 24 0.0104 0.0317

3 x 3 0.08 0.2533 30 x 30 0.013 0.0203 37.1

3 x 3 0.0625 0.2708 32 x 32 0.007 0.0243

3 x 3 0.054 0.279 70.1 35 x 35 0.011 0.0176 37.9

3 x 3 0.0475 0.2858 40 x 40 0.01 0.015 36

4 x 4 0.047 0.203 65.9 50 x 50 0.009 0.011 30.3

4 x 4 0.0348 0.2152 60 x 60 0.0075 0.0092 30.5

5 x 5 0.041 0.159 63.2 80 x 80 0.0055 0.007 31.4

6 x 6 0.035 0.132 62.7 100 x 100 0.0045 0.0055 30.3

6 x 6 0.0286 0.138 120 x 120 0.0037 0.0046 30.7

8 x 8 0.028 0.097 60.2 150 x 150 0.0026 0.0041 37.4

10 x 10 0.025 0.075 56.3 180 x 180 0.0023 0.0033 34.7

12 x 12 0.023 0.06 51.8 200 x 200 0.0021 0.0029 33.6

14 x 14 0.02 0.051 51 250 x 250 0.0016 0.0024 36

16 x 16 0.018 0.0445 50.7 270 x 270 0.0016 0.0021 32.2

18 x 18 0.017 0.0386 48.3 325 x 325 0.0014 0.0017 30

20 x 20 0.016 0.034 46.2

Wire Sizes other than above may be specified subject to vendor's approval as to practicability of weaving.

TABLE III. Type III Space Cloth for Sizing of materials

Medium Light Medium Medium Heavy Heavy

Wire Open Wire Open Wire Open Wire Open

Mesh Diameter Opening Area Diameter Opening Area Diameter Opening Area Diameter Opening Area

Inch Inch Percent Inch Inch Percent Inch Inch Percent Inch Inch Percent

1x1 0.105 0.895 80.1 0.135 0.865 74.8 0.162 0.838 70.2 0.207 0.793 62.9

2x2 0.08 0.42 70.6 0.105 0.395 62.4 0.135 0.365 53.3 0.177 0.323 41.7

2-1/2 x 2-

1/2

0.08 0.32 64 0.105 0.295 54.4 0.135 0.265 43.9 0.148 0.252 39.7

3x3 0.072 0.261 61.3 0.092 0.241 52.3 0.12 0.213 40.8 0.135 0.198 35.3

4x4 0.063 0.187 56 0.08 0.17 46.2 0.105 0.145 33.6 0.12 0.13 27

5x5 0.047 0.153 58.5 0.063 0.137 46.9 0.072 0.128 41 0.08 0.12 36

6x6 0.047 0.12 51.8 0.054 0.113 46 0.063 0.104 38.9 0.08 0.087 27.2

8x8 0.035 0.09 51.8 0.041 0.084 45.2 0.047 0.078 38.9 0.063 0.062 24.6

10x10 0.028 0.072 51.8 0.032 0.068 46.2 0.035 0.065 42.3 0.047 0.053 28.1

12x12 0.025 0.058 48.4 0.028 0.055 43.6 0.032 0.051 37.5 0.041 0.042 25.4

14x14 0.023 0.048 45.2 0.025 0.046 41.5 0.028 0.043 36.2 0.035 0.036 25.4

16x16 0.02 0.0425 46.2 0.023 0.0395 39.9 0.025 0.0375 36 0.028 0.0345 30.5

18x18 0.018 0.0376 45.8 0.02 0.0356 41.1 0.023 0.0326 34.4 0.028 0.0276 24.7

20x20 0.017 0.033 43.6 0.018 0.032 41 0.02 0.03 36 0.025 0.25 25

24x24 0.015 0.0267 41.1 0.016 0.0257 38 0.018 0.0237 32.4 0.02 0.0217 27.1

30x30 0.013 0.0203 37.1 0.0135 0.0198 35.3 0.015 0.0183 30.1 0.016 0.0173 26.9

35x35 0.011 0.0176 37.9 0.012 0.0166 33.8 0.0135 0.0151 27.9 0.15 0.0136 22.7

40x40 0.01 0.015 36 0.011 0.014 31.4 0.012 0.13 27 0.0135 0.0115 21.2

Medium Light

Medium Medium Heavy

Heavy Heavy

Wire Open Wire Open Wire Open Wire Open

Opening Diameter Area Diameter Area Diameter Area Diameter Area

Inch Inch Percent Inch Percent Inch Percent Inch Percent

4 0.5 79 0.625 74.8 0.075 70.9 1 64

3.5 0.4375 79 0.5 76.6 0.625 72 0.75 67.8

3 0.4375 76.2 0.5 73.5 0.625 68.5 0.75 64

2.75 0.375 77.4 0.4375 74.4 0.5 71.6 0.625 64.4

2.5 0.375 75.6 0.4375 72.4 0.5 69.4 0.625 64

2.5 0.0625

2.5 0.0475

2.25 0.375 73.4 0.4375 70.1 0.5 66.9 0.625 61.2

2 0.3125 74.8 0.375 70.9 0.4375 64 0.625 58

1.75 0.3125 71.9 0.375 67.8 0.4375 64 0.5 60.5

1.5 0.25 73.4 0.3125 68.5 0.375 64 0.5 56.3

1.375 0.25 71.5 0.3125 66.5 0.375 61.6 0.4375 57.5

1.25 0.25 69.4 0.3125 64 0.375 59.2 0.4375 54.8

1.125 0.225 69.6 0.25 67 0.3125 61 0.375 55.7

1 0.225 66.6 0.25 64 0.3125 58 0.375 52.9

1 0.1055

0.875 0.207 65.3 0.225 63.3 0.025 60.5 0.3125 54.3

0.75 0.192 63.4 0.207 61.4 0.025 563 0.3125 49.8

0.75 0.1055

0.75 0.072

0.75 0.0625

0.625 0.177 60.7 0.192 58.5 0.225 54 0.25 51

0.625 0.1055

0.625 0.054

0.5 0.162 57.1 0.177 54.5 0.192 52.2 0.207 49.8

0.4375 0.148 55.8 0.162 53.2 0.177 50.7 0.192 48.3

0.375 0.135 54.1 0.148 51.4 0.162 48.7 0.177 46.1

0.3125 0.12 52.2 0.135 48.8 0.148 46 0.162 43.4

0.25 0.105 49.6 0.12 45.6 0.135 42.2 0.148 39.4

0.1875 0.08 49.1 0.092 45.1 0.12 37.2 0.135 33.8

0.125 0.054 48.7 0.072 40.2 0.092 33.4 0.105 29.5

0.09375 0.041 47.6 0.047 45.2 0.063 35 0.08 29.6

0.0625 0.035 42.3 0.041 37 0.047 33.2 0.063 24.6

Wire sizes other than above may be specified subject to vendor's approval as to practicability of weaving.

3.4.4.6 Type V. Mesh size and wire size (diameter) shall be as specified. Vendors should be consulted as to practical combinations of wire diameters and meshes.

3.4.4.7 Type VI. Mesh size and wire size (diameter) shall be as specified in the drawing, contract or order. Vendor's should consult the applicable drawing.

3.4.4.8 Carbon steel wire hot galvanized after weaving. Carbon steel wire hot galvanized after weaving should be specified only in coarse sizes; in general not finer than 8 mesh, depending on the wire diameter.

3.4.4.9 Carbon steel wire galvanized before weaving or electrogalvanized. Carbon steel wire galvanized before weaving or electrogalvanized should be specified only in medium and coarse meshes; in general not finer than 40 mesh, dependent on the wire diameter.

3.4.4.10 Special industrial wire cloth. When industrial wire cloth is needed to be woven of metals or alloys other than those listed in 3.4.2, or having wire sizes

(diameter), space openings, or meshes other than those required by this specification, it is recommended that as many portions of this specification be used as possible, and that the tolerances be those of the regular cloth of this specification most nearly like the special cloth. When it is desired to increase the opening, the wire diameter shall be increased.

3.4.5 Widths. Widths shall be specified in inches and fractions thereof.

3.4.6 Lengths. Full rolls shall contain approximately 100 linear feet and shall not be in more than three pieces to the roll. Unless specifically permitted, no piece shall be less than 10 feet in length.

3.4.7 Tolerances.

3.4.7.1 Wire Diameter. Tolerances for wire diameter before weaving shall be in accordance with Table IV.

TABLE IV. Tolerances for wire diameters

Carbon Steel Stainless Steel and non-ferrous

Wire Diameter Tolerance Wire Diameter Tolerance

Inch Inch Inch Inch

0.300 and coarser +0.003 0.300 and coarser +0.002

0.4375 to 0.080 incl. .002 .4375 to 0.063 incl. .0015

.072 to .035" .001 .054 to .047 " .001

.032 to .028 " .0008 .041 .0008

.025 to .020 " .0006 .035 .00075

.018 to .016" .0005 .032 .0006

.15 to .011" .0004 .028 to 0.020 " .0005

.10 to .006 " .0003 .018 to .012 " .0004

.0055 to .0045 .0002 .011 to 008 " .0003

.0075 to .0045 " .00025

3.4.7.2 Mesh. Tolerances in mesh shall be applied separately for warp and for shoot and in accordance with Table V.

TABLE V. Tolerance in Mesh

Mesh Sizes Tolerance in mesh count

Warp wires Shoot wires

Percent Percent

30 Mesh and coarser +2 +3

Finer than 30, but not finer than 200 +2 +4

Finer than 200 +3 +4

3.4.7.3 Average opening of space cloth Types III and IV. The tolerances in average opening of space cloth, Types III and IV, shall be in accordance with Table

VI.

TABLE VI . Tolerances on openings for space cloth

Openings Tolerance (Plus or Minus)

Inches Inch

1/16 to 1/8 incl. 0.007

Over 1/8 to 3/16 incl. .010

Over 3/16 to 1/4 incl. .012

Over 1/4 to 3/8 incl. .015

Over 3/8 to 1/2 incl. .017

Over 1/2 to 3/4 incl. .020

Over 3/4 to 1 incl. .030

Over 1 to 1 1/2 incl. .045

Over 1 1/2 to 3 incl. .075

Over 3 .100

3.4.7.4 Width. Permissible tolerance in the width of the industrial wire cloth shall be in accordance with Table VII.

Mesh Tolerance in width

Inch

5 mesh and coarser +1/4

6 to 50 mesh

+1/8

Finer than 50 mesh

+1/16

3.4.7.4.1 In the case of selvaged cloth 3.4.9, measurements of the width shall be made from the outside of the loop of the selvage the outside of the loop of the opposite selvage.

3.4.8 Total Length. Permissible tolerance in the length shall be plus or minus 10 percent for total length specified.

3.4.9 Edges. Medium and fine meshes of Types I and II of industrial wire cloth are furnished commercially either with or without selvage edges. Coarse meshes of Types I and II, and all industrial wire cloth of Types III, IV and V are generally not obtainable with selvage edges; vendors should be consulted before specifying.

3.4.10 Workmanship. Industrial wire cloth shall be made of commercially high grade wire and shall be first-class in every respect. The cloth shall have smooth edges, and be free of tearing, projecting ends and rust pits.

3.5 ACCESSORIES

Item 1 - Caps.

Item 2 - Top rail and brace ends

Item 3 - Top rail sleeves

Item 4 - Wire Ties and Clips

Item 5 - Brace Bands

Item 6 - Tension Bands

Item 7 - Tension Bars

Item 8 - Tension Wire

Item 9 - Truss Rods

Item 10 - Barbed Wire

Item 11 - Barbed Wire Support Arms

Item 12 - Miscellaneous accessories

3.5.1 Material. Unless otherwise specified, material for accessories not specified herein shall be at the manufactured from material of such quality that after forming into finished products shall meet the requirements hereinafter specified.

3.5.2 Zinc-coating. Unless otherwise specified herein, all ferrous accessories shall be hot dip zinc coated with an average weight of not less than 1.2 ounces of zinc per square foot of coated surface unless otherwise specified.

3.5.3 Color coating and material. When color coating is required, the color shall be as specified, and shall match the color specified for chain-link fabric as cited in RR-F-191/1.

Ferrous accessories shall be zinc-coated in accordance with 3.4.2 prior to application of color coating. Unless otherwise specified, color coating material shall be at the option of the manufacturer.

3.5.4 Items

3.5.4.1 Item 1, Caps. All exposed ends of tubular posts shall be fitted with caps.

The cap shall fit snugly over the posts and exclude moisture such as rain.

When top rail is provided with caps, the caps shall have a ring or hole suitable for the through passage of the top rail. Caps shall be formed steel, malleable or cast iron, or aluminum alloy.

3.5.4.2 Item 2, top rail and brace ends. Ends for top rail and braces shall be provided when top rail or braces are required. Top rail and brace ends shall be formed steel, malleable or cast iron, or aluminum alloy.

3.5.4.3 Item 3, top rail sleeves. Top rail sleeves shall allow for expansion and contraction of the top rail. Top rail sleeves shall have a minimum length of

6 inches, and be of the same material as the top rail. Top rails provided with 3-inch swage ends are acceptable in lieu of top rail sleeves.

3.5.4.4 Item 4, Wire Ties and Clips. Wire ties or clips shall be provided for attaching fabric to line posts, top rail, or tension wire. Wire ties and clips shall be at intervals not greater than 15 inches when attaching fabric to line posts, and the space interval shall not exceed 24 inches when attaching fabric to top rails or tension wire. Wire ties and clips shall be not less than the fabric wire gauge size and of the same material and coatings. The minimum weight for zinc-coated wire ties and clips is 0.8 ounces of zinc per foot of coated surface area. Wire ties and clips shall not fracture when tested.

3.5.4.5 Items 5 and 6, brace and tension bands. Brace bands shall be used to secure top rail and brace ends to terminal posts. When tension bars are used, tension bands shall be used for securing chain-link fabric at each terminal post (see 3.5.4.6). Spacing of tension bands on posts shall be at 15-inch intervals or less. Brace and tension bands shall be steel and shall be 3/4 inch wide by 1/10 inch thick nominal.

3.5.4.6 Item 7, tension bars. Tension bars for 1 3/4 and 2-inch mesh shall be no less than 3/16 by 3/4 inch or equivalent cross-sectional area. Tension bars for 1-inch mesh shall b no less than 3/8 by 3/16 inch or equivalent cross-sectional area. A tension bar shall be provided where chain-link fabric meets terminal posts. Tension bars shall be steel, of a continuous length compatible with the height of the fence and shall be threaded through the fabric and attached to the post by tension bands (see 3.5.4.5). Roll formed posts with integral loops for weaving fabric to posts are acceptable in lieu of tension bars.

3.5.4.7 Item 8, Tension Wire. Tension wire shall be furnished when top rail is not required. Tension wire shall be used at the bottom of the fence when fabric is not otherwise secured. Tension wire shall be zinc coated steel, aluminum coated steel, polyvinyl chloride (PVC) over zinc-coated steel, or aluminum alloy as specified. Unless otherwise specified, all tension wire shall be 7 gauge wire size with an outside diameter of 0.177 inch (+0.005 inch).

3.5.4.7.1 Steel Tension Wire. Steel tension wire shall be marcelled or crimped coil spring hard tempered carbon steel wire. The tension wire shall have a minimum tensile strength of 75,000 pounds per square inch. Zinc-coated steel shall not have less than 1.2 ounces of zinc per square foot of coated surface area unless otherwise specified. Aluminum coated steel shall not have less than 0.40 ounces of aluminum per square foot of coated surface area. PVC coated wire shall have minimum coating thickness of 0.007 inches.

The coatings shall match the fence fabric unless otherwise

3.5.4.7.2 Aluminum Ally Wire. Aluminum alloy tension wire shall conform to the chemical composition of ASTM B211, Alloy 6061-T94.

3.5.4.8 Item 9, truss rods. Truss rods shall be steel and have a minimum diameter of

5/16 inch.

3.5.4.9 Item 10, barbed wire. Barbed wire shall consist of two 12-1/2 gauge 0.099 inch (+0.005 inch) twisted line wires with 14-gauge 0.080 inch (+0.005 inch) round barbs. Barbed wire shall be zinc-coated steel, aluminum coated steel, aluminum alloy, or PVC over zinc-coated steel as specified. All barbs shall consist of four points and spacing of barbs shall be at 5-inch (+ 1 inch) centers.

3.5.4.9.1 Zinc-coated steel barbed wire. Zinc-coated steel barbed wire shall have a zinc-coating of at least 0.80 ounces per square foot of coated surface area in accordance with ASTM A90.

3.5.4.9.2 Aluminum-coated steel barbed wire. Aluminum-coated steel barbed wire shall have an aluminum coating of at least 0.30 ounces per square foot of coated surface area. Solid aluminum barbs are acceptable.

3.5.4.9.3 PVC-coated steel barbed wire. PVC coated steel barbed wire shall have a PVC-coating of at least 0.007 inch thickness. The wire shall be coated with a minimum of 0.3 ounces of zinc per square foot of coated surface area before application of the PVC-coating.

3.5.4.9.4 Aluminum alloy barbed wire. Aluminum alloy barbed wire shall conform to the chemical composition of ASTM B211, Alloy

60661-T94.

3.5.4.10 Item 11, barbed wire support arms. Barbed wire support arms shall be of the following types as specified by ordering agency.

(a) Single - arm, for three barbed wire strands.

(b) V - arms, for six barbed wire strands.

(c) A - arms, for five barbed wire strands.

When installed, the barbed wire support arms shall project at an angle of 45

+ 5 degrees from the plane of the fence line and the outer strand of barbed wire shall be positioned 12 + 2 inches horizontally from the fence line.

Intermediate strands of barbed wire shall be uniformly spaced between the strand on the end of the support arm and the fabric. All support arms shall be fitted with clips or slots for attaching the barbed wire to the support arm.

Support arms shall be capable of withstanding a load of 250 pounds (lb) when tested.

3.5.4.11 Item 12, miscellaneous accessories. Unless otherwise specified, miscellaneous items, such as bolts, nuts, and washers shall be galvanized steel or aluminum alloy at the manufacturer's option.

3.6 Barbed wire shall be of the following types:

Type I -Zinc-coated

Type II -Aluminum-coated

Type III -Aluminum-clad

Type IV -Cooper-clad

Type V -Plastic-coated

3.6.1 Type I, zinc-coated

3.6.1.1 Strand wire. Size of strand and barb wires and weight of zinc-coating shall be in accordance with Table I, and as specified by the ordering agency. All wires shall be double strand unless otherwise specified.

TABLE I. Strand wire size and weight of zinc-coating on strand wire and barbs

Steel Nominal Diameter Wire Minimum Weight of Coating

Wire Zinc-Coated S-Strand of uncoated wire surface

Gauge Wire 1/ B-Barbs Class 1 Class 2 Class 3

Inch oz/ft2 oz/ft2 oz/ft2

12 0.106 S,B 0.30 0.50 0.80

12-1/2 .099 S,B .30 .50 .80

13 .092 S .30 .50 .70

13-1/2 .086 S,B .25 .45 .65

14 .080 S,B .25 .45 .65

15-1/2 .067 S .15 .35 .50

16 .062 B .15 .35 .50

1/ The drawn diameter of bright wire is controlled so that, after applying the protective coating, the wire conforms to the dimensions in this table and to the tolerances in 3.5.1.

3.6.1.2 Barbed wire fabrication. Number of points, spacing wire size, and shape of barbs shall be in accordance with Table II, as specified by the ordering agency.

TABLE II. Barbed wire fabrication, zinc coated.

Strand Nominal Diameter Number Spacing Shape

Steel Diameter of Barbs, of of of

Wire Zinc-coated Steel Wire Points Barbs Barbs

Gauge Strand Wire Gauge 1/

No. Inch No. Inch

12 0.106 14 4 4 Round

12-1/2 .099 12-1/2 2 4 Flat

12-1/2 .099 14 2 4 Half-round

12-1/2 .099 14 2 4 Round

12-1/2 .099 14 4 5 Half-round

12-1/2 .099 14 4 5 Round

13 2/ .092 13-1/2 4 6 Round

13-1/2 .086 14 2 4 Round

13-1/2 .086 14 4 5 Round

14 3/ .080 16 2 4 Round

1/ The gauge of half-round and flat barbs is designated by the gauge of the round wire from which the barbs are rolled.

2/ Single Strand Barbed Wire

3/ Temporary or electrified fencing

3.6.2 Type II, aluminum-coated. Aluminum coated barbed wire shall be in accordance with

Tables III and IV, as specified.

TABLE III. Size and construction of barbed wire.

Strand Nominal Diameter Number Spacing Shape

Steel Diameter of Barbs, of of of

Wire Aluminum-coated Steel Wire Points Barbs Barbs

Gauge wire in strand Gauge 1/

No. Inch No. Inch

12-1/2 0.099 14 2 4 Round

12-1/2 .099 14 4 5 Round

12-1/2 .099 14 4 5 Half-

Round

12-1/2 .099 12-1/2 2 4 Flat

14 .080 16 2 4 Round

1/ The gauge of the half-round and flat barbs is designated by the gauge of the round wire from which the barbs are rolled.

TABLE IV. Minimum weight of coating on a aluminum-coated barbed wire

Steel Nominal Diameter Minimum weight of

Wire of Aluminum- aluminum coating of

Gauge coated wire uncoated wire surface

No. Inch oz/ft2

12-1/2 0.099 0.19

12-1/2 .099 .30

14 .080 .17

14 .080 .25

16 .062 .13

16 .062 .19

3.6.3 Types III and IV

3.6.3.1 Strand Wire.

3.6.4 Type III, aluminum-clad. Nominal diameter of clad strand wire shall be 0.080 or 0.099 inch as specified. Tolerance on diameter of clad wire shall be plus or minus 0.002 inch.

Thickness of aluminum shall be 0.004 inch minimum.

3.6.5 Type IV, copper-clad. Nominal diameter of strand wire shall be 0.080 or 0.099 inch as specified. Tolerance on diameter of clad wire shall be plus or minus 0.002 inch. Unless otherwise specified, thickness of copper-clad shall be 0.005 inch minimum.

3.6.5.1 Barbs on strand wires. Number of points, spacing, wire size and shape of barbs shall be in accordance with Table III. Thickness of copper clad on barbs shall be 0.005 inch minimum, and the thickness of aluminum-clad on barbs shall be 0.004 inch or greater.

3.6.6 Type V, plastic-coated. Plastic-coated barbed wire shall have plastic-coated strand wire and aluminum alloy barbs. Unless otherwise specified, plastic coat on strand wire shall be weather-resisting polyvinyl chloride, and color and thickness of the plastic material shall be at the manufacturer's option.

3.6.7 Tolerances

3.6.7.1 Types I, and II, wire, strand and barbs. The permissible variations from the nominal diameter of wire shall be + 0.005 inch for zinc-coated wire and +

0.004 inch for aluminum-coated.

3.6.7.2 Types I, II, III, IV and V, spacing and length of barbs. The average spacing shall not exceed the spacing specified in Tables II and III and no individual spacing shall vary from the specified spacing by more than 3/4 inch. The length of barbs shall be not less than 1/2 inch.

3.6.7.3 Types I, II, III, IV and V

3.6.7.3.1 Joints in strand wire. Splicing of individual strand wires by means of wrap joint or an electric butt weld is permissible. No more than three splices or joints shall exist in any 80-rod (1320 feet) spool.

3.6.7.3.2 Barbed wire spools. Single strand wire shall be furnished in an 80 rod (1320 feet) reel-less pack. Double strand barbed wire shall be furnished on non-collapsible and non-returnable spools. When specified, each spool shall contain 80 rods (1320 feet), or 20 rods

(330 feet) of barbed wire. Spools shall be constructed in such a manner that the entire spool of barbed wire can be dispensed without collapse of the spool.

3.6.7.3.3 Breaking strength. When tested, zinc-coated, aluminum-coated, and plastic-coated barbed wire shall withstand the minimum loads in Table V. Aluminum-clad, and copper-clad barbed wire strand shall withstand a minimum load of 1100 pounds-force (lbf) for

0.099 inch diameter and 720 lbf for 0.080 inch diameter strand wire or wires.

TABLE V. Breaking strength, zinc-coated, aluminum-coated, and plastic-coated strand wire or wires

Size, each strand wire, gauge Breaking strength minimum

No. Lbf.

12 950

12-1/2 950

13 590 1/

13-1/2 950

14 650

15-1/2 850

1/ Single (one) strand wire.

3.6.8 Workmanship. Double wire strand shall be uniformly twisted and the barbs cut at an acute angle shall be sharp, well-formed and tightly wrapped. Single strand wire shall be crimped approximately 0.060 inch deep with a pitch of approximately 0.60 inch and the barbs cut at an acute angle shall be sharp, well-formed and tightly wrapped. Zinc-coated wire shall be free of bruised or scaled coating, blister and uncoated areas except ends of barbs. Aluminum and copper coatings, shall be free of flaking and shall completely cover the wire except at end of the barbs. Plastic coat or strand wire shall be free of cracks and openings to the base metal.

3.6.9 Intended Use

3.6.9.1 Barbed Wire. Barbed wire is intended for general use whenever barbs are required.

3.6.9.2 Woven Wire. Woven wire fencing is intended for enclosing fields, corrals, and yards, enclosure for protecting livestock, and for right-of way.

3.6.9.3 Netting. Netting is intended for poultry fencing.

3.6.9.4 Posts. Posts are intended for use as line, end, and corner supports and as intermediate braces. U-section posts are also used for sign posts.

3.6.9.5 Accessories.

3.6.9.5.1 Stays. Stays are intended for maintaining wire spacings and for additional support of woven wire and barbed wire in spaces between posts.

3.6.9.5.2 Fasteners. Wire fasteners or clamps are intended for attaching wires and barbed wire to metal posts.

3.6.9.5.3 Gates. Gates are intended as a means for entrance or egress for fenced enclosures.

4. INSTALLATION AND REPAIR

4.1 GENERAL

4.1.1 All material specified herein shall be full weight and first-class in every respect. All fittings necessary to produce a complete installation or repair shall be included even though not specifically mentioned.

4.1.2 Shop drawings showing layout, fabrication, assembly, color and erection details shall be submitted by the ordering agency with purchase requisition.

4.1.2.1 No forms are required unless otherwise indicated on the drawings. (see paragraph 7.2.2)

4.2 SITE PREPARATION

4.2.1 The location of fence lines, gates and terminal posts shall be marked with suitable stakes by the requesting agency. Stake intervals shall not exceed 500 ft. or line of sight.

4.2.2 All underground utility locations and other underground structures shall be identified by requesting agency.

4.2.3 Before installing or repairing chain-link fence, all necessary site clearing and grading shall be performed by the requesting agency. An adequate clearance on both sites of the fence line is required.

4.3 POST LOCATION

4.3.1 Space the posts equidistance at intervals not exceeding 10 ft. measure the interval parallel to the grade of the proposed fence and in the line of fence from center to center of the post.

4.3.2 Set terminal posts (end, corner and gate) at the beginning and end of each continuous length of fence and at abrupt changes in vertical and horizontal alignments.

4.4 POST SETTING

4.4.1 Set posts in concrete in holes of diameter and depth as follows unless otherwise specified

(see para. 7). Intended use and local conditions shall determine post footing dimensions that is, under normal conditions, the diameter shall be four (4) times the largest cross section of the post. The depth shall be a minimum of 24 in. plus an additional 3 in. for each 1 ft. increase in the fence height over 4 ft.

4.4.2 Dig or drill holes in the line of the fence in accordance with 4.4.1. Forms are not necessary.

4.4.3 Set posts in a vertical position, plumb and in line. Backfill concrete (3000 psi) into the excavation and extend 2 in. above grade. An alternate method is to stop footing 2 inc.

below grade to allow for cover with sod, blacktop, or other materials. Crown the concrete at the top to shed water and extend a minimum of 2 in. below the bottom of the post; or as specified (see para. 7).

4.4.3.1 On tennis courts, top of concrete footing shall be set flush with top of asphalt paving.

4.4.4 The use of mechanical devices for the setting of fence posts is acceptable under this practice, provided the mechanical device develops a strength in the ground equal or superior to the strength in the ground equal or superior to the strength in the ground equal to or superior to the strength developed by the concrete footing as recommended.

4.4.5 When solid rock or concrete is encountered, without an overburden of soil, set posts in the solid rock or concrete. The depth of the hole shall be three times the largest cross section of the posts. The diameter of the hole shall be 1/2 in. greater than the largest cross section of the post.

4.4.5.1 Excavation through concrete pavement may be done by cutting neat holes with a concrete saw.

4.4.6 The use of sleeves in order to leave voids in new concrete construction is allowed unless otherwise specified (see para. 7).

4.4.7 Half-fill the void with nonshrinkable hydraulic cement and force post to the bottom of the hole and plumb. Thoroughly work additional grout into the hole so as to leave no voids.

Crown the grout to shed water.

4.4.8 When solid rock is covered by an overburden of soil or loose rock, set the posts to the full depth unless the penetration into solid rock reached the minimum depths specified in 4.45, in which case terminate the depth of penetration, construct footings from the solid rock to the top of the ground. Grouting will be required on the portion of the posts in solid rock in accordance with 4.4.7.

4.4.8.1 Whenever posts are set in sleeves, they shall be so set with cement grout up to 1 in. of the top of the wall. The top 1 in. shall be caulked with leadite.

4.5 TERMINAL POST BRACING

4.5.1 No braces are required on fabric 6 ft. high or less where the top rail is specified. On all fabric over 6 ft., braces are required. On fabric over 12 ft. in height, a center rail is required, regardless of height, all fences installed without a top rail shall have braces on all terminals.

4.5.2 Securely fasten diagonal braces to the terminal post and the adjacent line post or its footing or a footing of equal size. There shall be no more than 50-deg. Angle between the brace and the ground. Securely fasten horizontal braces with truss rods to the adjacent line posts and terminal posts.

4.5.3 When the top rail is used, attach the brace at the halfway point of the terminal post above grade and, when the top rail is omitted, at the two-thirds point above grade.

4.6 TOP RAIL AND TENSION WIRE

4.6.1 Support the top rail at each post so that a continuous brace from end to end of each stretch of fence is formed. Securely fasten the top rail to the terminal posts and join to the terminal posts and join with sleeves or coupling to allow for expansion and contraction.

4.6.2 When the top rail is omitted, stretch a tension wire from end to end of each stretch of fence at a height that will enable it to be fastened to the fabric within the top 1 ft. of the chain-link fabric. Securely fasten the tension wire to the terminal posts. The tension wire shall be taut and free of sag.

4.7 CHAIN-LINK FABRIC

4.7.1 Place chain-link fabric on the outside of the area enclosed or as specified (see para. 7).

4.7.1.1 Where fencing enclosures court games areas such tennis or basketball, the fabric shall be installed on the inside, facing the court game area.

4.7.2 Place the fabric by securing one end, applying sufficient tension to remove all slack making attachment elsewhere. Tighten the fabric to provide a smooth uniform appearance free of sag.

4.7.2.1 Fabric shall be tied in such manner as to be flush with the top of the top rail and the bottom of the bottom rails. The bottom rails shall be installed 2

(two) inches above finish grade. However, on tennis courts, bottom rail shall be installed 1 (one) inch above finished surface.

4.7.3 Cut the fabric by untwisting a picket and attach each span independently at all terminal posts. Use stretcher bars with tension bands at maximum 15 in. intervals or any other approved method of attachment.

4.7.4 Install fence fabric 2 in. above ground level. Measure clearance at the post with a tolerance of + 3 in. Fasten the fabric to the line posts at intervals not exceeding 15 in.

Fasten the fabric to the rail or tension wire at intervals not exceeding 24 in.

4.7.5 Join rolls of wire fabric by weaving a single picket into the ends of the rolls to form a continuous mesh.

4.8 BARBED WIRE

4.8.1 If barbed wire is required, pull it taut to remove all sag, firmly install it in the slots of the extension arms, and secure it to a post or terminal arm.

4.9 GATES

4.9.1 The requesting agency shall indicate the operational directional of the gates. Grade clearance and possible gate obstruction shall be considered in design to provide adequate operational clearance so that the gate can operate freely.

4.9.2 Install gates true to opening and plumb in a closed position

4.10 APPEARANCE

4.10.1 The area of installation or repair shall be left neat and free of any debris caused by the erection or repair of the fence.

4.10.2 Any concrete pavement which is damaged by the Contractor shall be replaced to nearest joint, and any grass disturbed shall be reseeded.

5. SAMPLING, INSPECTION AND TEST

5.1 Chain link fencing materials and installation covered by this specification will be subject to inspection by the City of Philadelphia upon completion and prior to payment. The completed work must meet the requirements of this specification in all respects.

6. DELIVERY

6.1 The fencing shall be installed at the location specified on the purchase order.

6.2 Contractor shall be responsible for inspecting the site prior to installation.

7. NOTES TO REQUISTIONER

7.1 Deviations from the requirements of this specification will be considered only upon adequate written justification from the using agency.

7.2 Requisitions for chain…