In Depth Review 2022 Section 858 451 SECTION 858
858.01 Geosynthetic Material
Provide fabric consisting of polymeric filament or yarns such as polypropylene, polyethylene, polyester, polyamide, or polyvinylidene chloride. Woven slit film geotextile material is not allowed. Use fabric composed of filaments or yarns that are formed into a stable network that retain their relative position to each other. Use material that is inert to commonly encounter ed chemicals and meets requirements of Table 858 -01 or Table 858-02. Values in Table 858-01 and 858-02 represent average roll values. Use geosynthetics for materials included on Table 858-01 from manufacturers or suppliers that maintain compliance with the NTPEP audit program for geosynthetics. Include the NTPEP number identifying the material test results on the Certificate of Compliance. Submit the CoC a minimum of 21 days before material is incorporated into the work. Table 858 -01 Geosynthetics for Separation, Riprap, and Reinforcement Geosynthetic Material Property Test Method Separation2 Riprap RR Reinforcement R1 S1 S2 Ultimate Grab Strength1, lbs., min. ASTM D 4632 180 180 200 350 Wide Width Tensile Strength1, lbs / inch., min. ASTM D 4595 N/A N/A N/A 270 Ultimate Grab Elongation1, % ASTM D 4632 N/A N/A 15 (min) 25 (max) Trapezoid Tearing Strength, lbs., min. (any direction) ASTM D 4533 50 50 50 100 Static Puncture Strength lbs., min. ASTM D 6241 405 405 435 1000 AOS less than mm, (greater than US STD. Sieve) ASTM D 4751 0.212 (70) 0.15 (100) 0.3 (50) 0.6 (30) Permittivity, sec.-1, min. ASTM D 4491 0.5 0.05 0.5 0.5 UV Resistance (After 500 hrs.) % min Strength Retained ASTM D 4355 70 70 70 70 Sewn -Seam Strength, lbs ASTM D 4632 160 160 180 310 1 Weakest principal direction. 2 Separation fabrics shall be nonwoven fabrics. In Depth Review 2022 Section 858 452 Table 858-02 Geosynthetics for Drainage Geosynthetic Material Property Test Method D1 D2 D32 D42 Ultimate GrabStrength1, lbs., min. ASTM D 4632 180 80 100 N/A Trapezoid Tearing Strength, lbs., min. (any direction) ASTM D 4533 50 25 N/A N/A Static Puncture Strength lbs., min. ASTM D 6241 435 135 180 180 AOS less than mm, (greater than US STD. Sieve) ASTM D 4751 0.3 (50) 0.15 (100) 0.125-0.600 (30 - 120) 0.125 - 0.600 (30-120) Permittivity, sec.-1, min. ASTM D 4491 0.5 0.05 0.7 1 relaxed UV Resistance (After 500 hrs.) % min Strength Retained ASTM D 4355 70 70 70 N/A Sewn - Seam Strength, lbs ASTM D 4632 160 70 903 N/A 1 Weakest principal direction. 2 Type D3 and D4 fabric may only be used as a geosynthetic fabric sock. The type D4 fabric will be knit of 150 denier (min.) polyester yarn, exhibit minimum snag or “run” potential, be factory ‐applied to maintain a uniform installed weight, and conform to the outside diameter of the pipe with a snug fit throughout. 3 May be constructed using welded seams .
858.02 Geogrid
Provide a biaxial geogrid structure that is dimensionally stable and able to retain its geometry under construction stresses. Use material that is inert to commonly encountered chemicals and meets requirements of Table 858-03. Values in Table 858- 03 represent minimum average roll values. Table 858 -03 Geogrid Geosynthetics GEOGRID PROPERTY TEST METHOD GEOGRID TYPE G Aperture Size ID Calipered 0.5 - 1.5 inch Tensile Strength1 @ 2% Strain, lb/ft, min. ASTM D 6637 400 Tensile Strength1 @ 5 % Strain, lb/ft, min ASTM D 6637 800 Ultimate Tensile1 Strength, lb/ft, min. ASTM D 6637 1,300 In Depth Review 2022 Section 858 453 Table 858 -03 Geogrid Geosynthetics GEOGRID PROPERTY TEST METHOD GEOGRID TYPE G Junction Efficiency, %, min. GRI2 GG2 90 UV Resistance (After 500 hrs), % Strength Retained ASTM D 4355 70 1 Strength values represent weakest principal direction 2 Geosynthetic Research Institute
858.03 Reinforcement Geogrid
Submit a Certificate of Compliance for reinforcement geogrid. Include the NTPEP number identifying the material test results on the Certificate of Compliance. Values in Table 858- 04 represent minimum average roll values. Table 858-04 Reinforcement Geogrid Geogrid Property Test Method Geogrid Type RG UV Resistance (After 500 hrs), % Strength Retained ASTM D 4355 70 Long Term Tensile Strength (𝑇𝑇𝐹𝐹𝑎𝑎 ) AASHTO R 69 See Plans for Long Term Tensile Strength Section 860 454 SECTION 860 FENCE
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.
Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 486–488 of 550.