710 FENCE AND GUARDRAIL

710.01 Barbed Wire. Furnish barbed wire according to ASTM A 121, Type Z, Class 3 Galvanizing, or ASTM A 585, Type I, with the following modifications:

A. ASTM A 121, Type Z, Class 3.

6.3.1 Ensure that the weight of coating for various gages of wire composing the strands and barbs are not less than 0.80 ounces per square foot (244 g/m2) of surface.

7.1 Furnish No. 12 1/2, 13 1/2 or 15 1/2 steel wire gage barbed wire. Ensure that the barbs are four point round steel wire spaced 5 inches (130 mm) center-to-center.

9.1 Select one sample, as per Section 9.2, from each 50 spools or fraction thereof.

11.1 Perform inspection at the project site.

Furnish certified material according to Supplement 1067.

B. ASTM A 585, Type I.

12.3 Does not apply.

14.1 Perform inspection at the project site.

Furnish certified material according to Supplement 1067.

710.02 Woven SteelWireFence, Type 47. Furnish woven steel wire fence according to ASTM A 116, Type Z, Class 3 galvanizing, with the following modifications:

7.1 Ensure that the fence fabric is design number 1047-6.9.

11.1 Perform inspection at the project site.

In addition, ensure that all hardware and attachments are galvanized according to 711.02.

Furnish certified material according to Supplement 1067.

710.03 Chain-Link Fence. Furnish chain-link fence according to AASHTO M 181, with the following modifications:

3.1 Furnish posts, gate frames, post braces, and top rails made of Type I or Type III material. Furnish Type I material conforming to the requirements of Table 710.03-1. Furnish Type III material conforming to the requirements of Table 710.03-2.

Furnish top rails in lengths not less than 18 feet (5.5 m).

Fasten the fabric to the posts using either aluminum alloy or galvanized steel bands or wires. Furnish wires that have a 0.148-inch (3.7 mm) minimum diameter and a zinc coating or steel fasteners that are not less than 0.8 ounces per square foot (244 g/m2).

Furnish stretcher bars that have a 3/4 3/16-inch (19  5 mm) cross-section or an equivalent cross-section with a length equal to full height of fabric.

Furnish steel truss rods that have a steel 3/8-inch (9.5 mm) diameter or equivalent cross-section and that have suitable adjustment.

TABLE 710.03-1 STEEL POSTS, GATE FRAMES, POST BRACES, AND TOP RAILS

Usage

nominal

fence height

6 ft or less

Section

Thickness

Outside

Diameter or

Dimensions

(in)

Weight

Nominal

lb/ft

Tolerance

(%)

Minimum

Yield

Strength

(psi)

Line posts

Grade 1 Pipe

2.375

3.65

-5

25,800

Grade 2 Pipe

2.375

3.12

-5

50,000

C-Section

2.250 1.700

2.73

-6

45,000

H-Section

2.250 1.700

3.26

-5

45,000

End, corner pull posts

Grade 1 Pipe

2.875

5.79

-5

25,800

Grade 2 Pipe

2.880

4.64

-5

50,000

Square

2.500

5.70

-3

40,000

Roll-form

3.500 3.500

5.14

-6

35,000

Gate Posts,for nominal width of gate (single or one leaf of Double):

Up to 6 ft incl.

Grade 1 Pipe

2.880

5.79

-5

25,800

Grade 2 Pipe

2.880

4.64

-5

50,000

Square

2.500

5.70

-3

40,000

Roll-form

3.500 3.500

5.14

-6

35,000

Over 6 to 13 ft incl.

Grade 1 Pipe

4.000

9.11

-5

25,800

Grade 2 Pipe

4.000

6.56

-5

50,000

Square

3.000

9.35

-3

40,000

Over 13 to 18 feet incl.

Grade 1 Pipe

6.630

18.97

-5

25,800

Over 18 feet

Round

8.625

24.70

-5

25,800

Gate frames

Grade 1 Pipe

1.900

2.72

-5

25,800

Grade 2 Pipe

1.900

2.28

-5

50,000

Square

2.000

2.66

-3

40,000

Top rails,[1] post braces

Grade 1 Pipe

1.660

2.27

-5

25,800

Grade 2 Pipe

1.660

1.84

-5

50,000

H-Section

1.500 1.310

2.25

-5

45,000

Roll-form

1.6250 1.250

1.35

-6

35,000

Round tubing

1.660

1.38

-5

50,000

[1] When tension wire is specified, it will be of 0.177 in diameter.

 

TABLE 710.03-1M STEEL POSTS, GATE FRAMES, POST BRACES, AND TOP RAILS

Usage nominal fence height 1.8 m or less

Section

Thickness

Outside Diameter or Dimensions

(mm)

Weight

Nominal

(kg/m)

Minimum

Tolerance

(%)

Yield

Strength

(MPa)

Line posts

Grade 1 Pipe

60

5.4

-5

178

Grade 2 Pipe

60

4.6

-5

348

C-Section

57 43

4.1

-6

310

H-Section

57 43

4.9

-5

310

End, corner pull posts

Grade 1 Pipe

73

8.6

-5

178

Grade 2 Pipe

73.00

6.9

-5

345

Square

64.00

8.5

-3

276

Roll-form

89 89

7.6

-6

241

Gate Posts,for nominal width of gate (single or one leaf of Double):

Up to 1.8 m incl

Grade 1 Pipe

73.00

8.6

-5

178

Grade 2 Pipe

73.00

6.9

-5

345

Square

64.00

8.5

-3

276

Roll-form

89 89

7.6

-6

241

Over 1.8 to 4 m incl.

Grade 1 Pipe

102.00

13.6

-5

178

Grade 2 Pipe

102.00

9.8

-5

345

Square

76.00

13.9

-3

276

Over 4 to 5.5 m incl.

Grade 1 Pipe

168.00

28.2

-5

178

Over 5.5 m

Round

219

36.8

-5

178

Gate frames

Grade 1 Pipe

48

4.0

-5

178

 

Grade 2 Pipe

48

3.4

-5

345

 

Square

51

4.0

-3

276

Top rails,[1]

post braces

Grade 1 Pipe

42

3.4

-5

175

Grade 2 Pipe

42

2.7

-5

345

H-Section

38 33

3.3

-5

310

Roll-form

41 32

2.0

-6

241

Round tubing

42

2.1

-5

345

[1] When tension wire is specified, it will be of 4.5 mm diameter.

 

Furnish ornamental cap post tops made of steel, malleable iron or cast iron. Furnish them with a hole suitable for through passage of the top rail. Ensure that they fit snugly to the post, have a means of attaching securely to the post, and exclude moisture from tubular posts. Furnish swing type gates complete with latches, stops, keepers, hinges, locks, and fabric. Cover them with fabric matching the fence. Furnish hinges of adequate strength to support the gate and that do not twist or turn under action of the gate. Locate plunger bar type latches at the full gate height in a manner that will engage the gate stop. Forked latches may be used for single gates less than 10 feet (3 m) wide. Furnish lockable latches. Furnish stops that consist of a flush plate with anchor placed in concrete to engage the plunger bar of the latch. Other approved types of stops may be used for single gates less than (10 feet) 3 m wide. Keepers are substantial devices for securing and supporting the free end of the gate in open position.

Furnish top rail couplings consisting of the outside sleeve type at least 6 inches (150 mm) long. Ensure that a minimum of 20 percent of the coupling has an internal heavy spring to take up expansion and contraction.

Furnish gate frames that are assembled by welding, using properly designed, formed sheet, or sandcast fittings. Cover the gates with fabric matching the fence.

Furnish offset type hinges. Furnish galvanized latches, stops, and keepers made of malleable iron, except for plunger bars that may be galvanized tubular or bar steel according to Section 6.2.

Furnish top rails in lengths not less than 18 feet (5.5 m).

Furnish flat stretcher bars in 3/4 1/4-inch (19 6 mm) sections.

Furnish self-centering outside rail couplings that are 6 inches (150 mm) long.

Furnish tie wire that has a 0.148-inch (3.7 mm) minimum diameter and that meets an aluminum alloy.

Furnish wrought or cast turnbuckles.

Furnish truss and brace rods with an 3/8-inch (9.5 mm) outside diameter or equivalent cross-section.

Furnish beveled brace bands in 1 1/8-inch (25 3 mm) section.

Furnish bolts with an anodic coating at least 2 mil (5 mm) in thickness, chromate sealed.

11.1. Ensure that the size of the fabric conforms to 0.148-inch (3.7 mm) nominal diameter of coated wire, 2-inch (50 mm) mesh.

14.1 Table 8. Type I Zinc-Coated SteelChain Link Fabricwill have Class D weight of coating.

15.5 Ensure that the vinyl covering is of a uniform medium green color.

19.1 Perform inspection at the project site.

32.2 Does not apply.

32.3.3.2. Increase the minimum weight of interior coating to an average of 0.9 ounces per square foot (275 g/m2) and not less than 0.8 ounces per square foot (244 g/m2) on an individual specimen.


TABLE 710.03-2 DIAMETERS OR PLAIN END, SCHEDULE 40 ALUMINUM ALLOY PIPE

The weights and dimensions are as specified in ANSI H 35.2.

 

Nominal PipeSize

Material

(in)

(mm)

Brace rails and top rails

1 1/4

32

Gate frames and rail couplings

1 1/2

40

Line posts

2

50

End and corner posts

2 1/2

65

Gate posts single or one leaf of double:

 

 

Gate opening

 

(ft)

(m)

(in)

(mm)

To 6

To 1.8

2 1/2

65

Over 6 to 12

Over 1.8 to 3.7

3 1/2

90

Over12 to 18

Over 3.7 to 5.5

6

150

Over 18 to 32

Over 5.5 to 9.8

8

200

 

 

A 88 line post may be substituted in lieu of the line post shown on standard drawings Chain Link Fence1.1, 7-28-00 and Walk Gates F-3.2, 7-28-00. This will be accomplished by reducing the 4-0 depth as necessary to accommodate the shorter posts, all other dimensions shown in the standard drawings shall remain unchanged

Furnish certified material according to Supplement 1067.

710.06 Deep Beam Rail. Furnish deep beam rail according to AASHTO M 180, Type II, Class A, with the following modifications:

5.1 Perform inspection at the project site.

5.2.1 When a field check of coating thickness shows insufficient coating thickness or shows insufficient coating weight, sample and test the guardrail.

9.1.2 The minimum check limits for both triple and single-spot tests apply.

Furnish certified material according to Supplement 1042.

710.09 WireRope Rail. Furnish wire rope rail according to AASHTO M 30, Class A, Type I rope, with the following modification:

9 Perform inspection at the project site.

Obtain random samples from material delivered to the project site or at other locations designated by the Laboratory.

710.11 FencePostsand Braces. Furnish round wood posts conforming to 710.12 and 710.14. Furnish dimension timber, posts, and lumber for braces and stream crossings that are sound, straight, free from unsound or loose knots, splits and shakes, and that are treated according to 712.06.

Furnish steel line posts according to ASTM A 702, with the following modifications:

5.6.2 Furnish fasteners or clamps that have a 0.120-inch (3 mm) diameter and that are galvanized according to ASTM A 116, Type Z, Class 3.

5.6.1 Supply each post with a sufficient number of fasteners or clamps.

6.2 Ensure that the post lengths are as designated.

7.1 Furnish galvanized line posts and anchors according to 711.02.

7.2 Delete.

9. Perform sampling according to 712.06.

Furnish certified material according to Supplement 1067.

710.12 Square-Sawed and Round GuardrailPosts. Furnish pressure treated square-sawed and round guardrail posts according to 710.14 and 712.06. Cut posts from growing timbers that are free from unsound or loose knots and rot and from injurious or excessive shake, and season checks that exceed 1/4 inch (6 mm) in width.

Furnish round posts that are 8 1 inch (200 25 mm) in diameter and have a uniform taper. Ensure that the sweep does not exceed 1 inch (25 mm) for the length of the post. Peel round posts their entire length, removing all outer and inner bark and leather fiber by shaving the surface. Trim knots even with the post, and saw both ends of the post square.

Furnish square sawed posts that are free from injurious cross grain and sapwood. They may contain a limited number of sound knots that do not exceed 2 inches (50 mm) in diameter. Ensure that they are from wane above the ground line. Ensure that the wane below the ground line is limited to two adjacent corners and does not exceed 1 1/2 inches (38 mm) measured along the wane.

Furnish certified material according to Supplement 1072.

710.14 Pressure Treated Guardrailand FencePosts, Braces, and Blocks. Furnish pressure treated guardrail and fence posts, braces, and blocks according to AASHTO M 168 and 710.11, 710.12, and 712.06.

Furnish certified material according to Supplements 1042 and 1072.

710.15 SteelGuardrailPosts. Furnish steel guardrail posts in the sections and lengths as specified. Ensure that they are made of copper bearing steel when so specified. Furnish steel according to ASTM A 36/A 36M. Furnish galvanized posts according to 711.02.

Furnish certified material according to Supplements 1042.

710.16 Guard Posts. Furnish pressure treated wood posts according to 710.14 Furnish posts that are either 5 6-inch (125 150 mm) sawed square or 5 1/2-inch + 1/2-inch (138 mm) diameter round when measured 30 inches (0.75 m) from the top. Furnish posts that are 5 feet, 3 inches (1.6 m) in length and are embedded such that 30 inches (0.75 m) remains exposed. Ensure that the center-to-center spacing is spaced at 6 feet (1.8 m) intervals, unless otherwise shown on the plans.

Furnish certified material according to Supplements 1042