454 SECTION 860
860.01 Chain Link Fence
A.Fabric. Provide chain link fabric composed of 9 gauge wire with a 2 inch mesh that meets the requirements of AASHTO M 181, Type I, Class C. Use wire that is knuckle finished on the top and bottom.
B.Tensioning Wires. Provide tensioning wires that meet the requirements of AASHTO M 181, Type I, Class 2.
C.Posts, Rails, and Gate Frames. Provide posts, rails, and gate frames that meet the requirem ents of AASHTO M 181, Grade 2.
860.02 Barbed Wire and Woven Wire Fence
A.Barbed Wire. Provide barbed wire that meets the requirements of AASHTO M 280. Provide wire that has a minimum gage of 12½ and at least 2 point barbs.
B.Woven Wire. Provide woven wire that meets the requirement of AASHTO M 279, Design Number 939-6 - 12½.
C.Staples. Use staples that are 1.5 inches long and made of No. 9 gauge galvanized wire.
D.Steel Posts. Provide posts that meet ASTM A 702, Type B Steel and galvanized in accordance with AASHTO M 111 or painted in accordance with Section 852.01 A, “Lamp Black” , or Section
852.01 C, “Enamels” .
Use angle-type end, corner, pull posts, and braces that are galvanized in accordance with AASHTO M 111, or painted in accordance with Section 852, “Paints, Oils, and Thinners” . Do not use posts that weigh less than 97 percent of the specified weight.
E.Wood Posts. Treat wood posts as specified in Section 846, “Preservatives and Pressure Treatment for Timber” . Use posts that have the inner bark shaved off, knots trimmed, and that are pointed for driving before treatment. Provide posts that are within a tolerance of 1 inch of the specified length. Provide posts that contain no decay, short kinks, or reverse bends. Posts may contain knots that are sound, smoothly trimmed, and do not impair the strength of the posts. Posts may have one way sweep that does not exceed 1.5 inches. Provide naturally round posts cut from live trees of the species listed in Table 860-01. Table 860 -01 Pine Fir Spruce Cedar Aspen American Elm Eastern Cottonwood Section 862 456 SECTION 862 GUARDRAIL AND POSTS
862.01 General
Provide steel components of guardrail galvanized according to Section 854, “Galvanizing ”.
862.02 Wire Rope and Fittings for Cable Guardrail
A.Wire Rope and Connecting Hardware. Provide wire rope and connecting hardware that meet AASHTO M 30, Type I, Class A. Provide connecting hardware that develops the full strength of a single cable 25,000 pounds.
B.Cast Steel Components. Provide cast steel components that meet AASHTO M 103.
C.Socket Baskets and Wedges. Design socket baskets for use with the wedge detailed on the plans.
D.Bolts, Nuts, and Washers. Use bolts that meet ASTM A 307, Grade A. Use nuts that meet ASTM A 563, Grade A. Use hook bolts that, when installed, develop an ultimate pull open strength between 500 and 1,000 pounds applied in a direction normal to the longitudinal axis of the post. Use steel washers that meet the dimensional requirements of ANSI B 27.2, Type A plain washer.
E.Washer Plates. Use end and line post washer plates that meet AASHTO M 183.
862.03 Guardrail Units and Fittings for W- Beam Guardrail
Provide W-Beam guardrail units, backup plates, flared end sections, and buffer end sections that meet AASHTO M 180, Class A, Type II. Use terminal connectors that meet AASHTO M 180, Class B, Type II.
A.Button Headed Bolts and Hex Bolts. Use button headed bolts that meet ASTM A 307. Use hex bolts that meet ASTM A 307, Grade A. Use nuts that meet ASTM A 563, Grade A.
B.Plates. Use rectangular plate washers that meet AASHTO M 180. Use break -away cable treatment, cable end plates, bearing plates, and anchor plates that meet AASHTO M 180.
Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 489–490 of 550.