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, according to 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 Steel Wire Fence, 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, and post braces, 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.

          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, And POST BRACES,

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

10

30,000

Grade 2 Pipe

2.375

3.12

10

50,000

C-Section

2.250 x 1.700

2.78

10

50,000

H-Section

2.250 x 1.700

3.26

10

50,000

End, corner pull posts

Grade 1 Pipe

2.875

5.79

10

30,000

Grade 2 Pipe

2.875

4.64

10

50,000

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

Up to 6 ft incl.

Grade 1 Pipe

2.875

5.79

10

30,000

Grade 2 Pipe

2.875

4.64

10

50,000

Over 6 to 13 ft incl.

Grade 1 Pipe

4.000

9.11

10

30,000

Grade 2 Pipe

4.000

6.56

10

50,000

Over 13 to 18 feet incl.

Grade 1 Pipe

6.625

18.97

10

30,000

Over 18 feet

Round

8.625

28.58

10

30,000

Gate frames

Grade 1 Pipe

1.900

2.72

10

30,000

Grade 2 Pipe

1.900

2.28

10

50,000

Tension Wire,[1] post braces

Grade 1 Pipe

1.660

2.27

10

30,000

Grade 2 Pipe

1.660

1.84

10

50,000

Roll-form

1.6250 x 1.250

1.35

10

50,000

Round tubing

1.660

1.38

10

50,000

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

 

TABLE 710.03-1M  STEEL POSTS, GATE FRAMES, And POST BRACES,

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

10

209

Grade 2 Pipe

60

4.6

10

345

C-Section

57 x 43

4.1

10

345

H-Section

57 x 43

4.9

10

345

End, corner pull posts

Grade 1 Pipe

73

8.6

10

209

Grade 2 Pipe

73.00

6.9

10

345

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

10

209

Grade 2 Pipe

73.00

6.9

10

345

Over 1.8 to 4 m incl.

Grade 1 Pipe

102.00

13.6

10

209

Grade 2 Pipe

102.00

9.8

10

345

Over 4 to 5.5 m incl.

Grade 1 Pipe

168.00

28.2

10

209

Over 5.5 m

Round

219

42.5

10

209

Gate frames

Grade 1 Pipe

48

4.0

10

209

Grade 2 Pipe

48

3.4

10

345

Tension Wires,[1]

post braces

Grade 1 Pipe

42

3.4

10

209

Grade 2 Pipe

42

2.7

10

345

Roll-form

41 x 32

2.0

10

345

Round tubing

42

2.1

10

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 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 Steel Chain Link Fabric will 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 Pipe Size

Material

(in)

(mm)

Brace 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 8'-8" line post may be substituted in lieu of the line post shown on standard drawings Chain Link Fence 1.1, 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  Wire Rope 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  Fence Posts and 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 Guardrail Posts.  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.

  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 round posts for the follow species only:

Douglas Fir:
Knot diameter for posts of Douglas Fir shall not exceed 51 mm (2 in.). Ring density for the species shall be at least 6 rings-per-inch as measured over a 76 mm (3 in.) distance. The diameter of the Douglas Fir posts shall be 184 mm (7 in.) at the ground line with a upper limit of 203 mm (8 in.).

 

Southern Pine:
Knot diameter for posts of Southern Pine shall not exceed 64 mm (2 in.). Ring density for the species shall be at least 4 rings-per-inch as measured over a 76 mm (3 in.) distance. The diameter of the Southern Pine posts shall be 190 mm (7 in.) at the ground line with a upper limit of 210 mm (8 in).

 

Ponderosa Pine:
Knot diameter for posts of Ponderosa Pine shall not exceed 102 mm (4 in.). Ring density for the species shall be at least 6 rings-per-inch as measured over a 76 mm (3 in.) distance. The diameter of the Ponderosa Pine posts shall be 203 mm (8 in.) at the ground line with an upper limit of 222 mm (8 in.).

 

Furnish square sawed posts that are free from injurious cross grain and sapwood. 

Species

White Pine

Maximum Slope of Grain

1 in 15

Nominal Width of Face

6" [152]

8" [203]

Shakes, Checks,
and Splits

Green

1" [25]

1 3/8" [35]

Seasoned

1 1/2" [38]

2" [51]

Maximum Wane

1" [25]

1 3/8" [35]

Maximum Allowable

Knots

Narrow Face

Middle 1/3 of Length

1 3/8" [35]

1 5/8" [41]

End (1)

2 3/4" [70]

3 1/4" [83]

Sum in Middle of Length (2)

11" [279]

13" [330]

 

 

Wide Face

Edge Knot in Middle 1/3 of Length

1 3/8" [35]

1 5/8" [41]

Edge Knot at End (1)

2 3/4" [70]

3 1/4" [83]

Centerline

1 3/8" [35]

1 7/8" [48]

Sum in Middle Half of Length

5 1/2" [140]

7 1/2" [190]

 

Furnish certified material according to Supplement 1072.

710.14  Pressure Treated Guardrail and Fence Posts, 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  Steel Guardrail Posts.  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.