710 FENCE AND GUARDRAIL

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

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

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

710.03 Chain-Link Fence. Furnish chain-link fence conforming 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.

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 than0.8 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.

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 shall be of 0.177 in diameter.

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 shall 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 conforming to Section 6.2.

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

Furnish truss and brace rods with an 3/8-inch (9.5 mm) outside diameter or equivalent cross-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 5. Type I Zinc-Coated Steel Chain Link Fabric shall have Class D weight of coating.

20.1 Furnish three certified copies of the chemical and physical properties of each of the aluminum components to the Engineer.

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.

		Nominal Pipe Size
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

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

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

710.09 Wire Rope Rail. Furnish wire rope rail conforming 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 conforming 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.

710.12 Square-Sawed and Round Guardrail Posts. Furnish pressure treated square-sawed and round guardrail posts conforming 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.

Acceptance. Use only structural timber, lumber, piling, posts, braces and blocks furnished under certification requirements of Supplement 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 conforming to ASTM A 36/A 36M. Furnish galvanized posts conforming to 711.02.

710.16 Guard Posts. Furnish pressure treated wood posts conforming 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.