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I Radial stiffness at low strain,(3) kN/m @ 0.5% strain 300 I Radial stiffness at low strain,(3) (lb/ft @ 0.5% strain) 20,580 I Durability Resistance to chemical 100% degradation(4) I Resistance to ultra-violet light and 100% weathering(5) I12 Notes: 3 4 1. Load transfer capability determined in accordance with GRI-GG2-87 and GRI-GG1-87 I 5 and expressed as a percentage of ultimate tensile strength. 6 2. In-plane torsional rigidity measured by applying a moment to the central junction of a I7 225mm x 225mm specimen restrained at its perimeter in accordance with U.S. Army 8 Corps of Engineers Methodology for Measurement of Torsional Rigidity, (Kinney, T.C. 9 Aperture stability Modulus ref 3, 3-1-2000). 10 3. Radial stiffness is determined from tensile stiffness measured in any in-plane axis from I11 testing in accordance with the scope of ISO 10319:1996. 12 4. Resistance to loss of load capacity when subjected to chemically aggressive 13 environments in accordance with testing to ISO12960 as part of a durability assessment I14 in accordance with ISO13434:1999 7.3 15 5. Resistance to loss of load capacity when subjected to ultra-violet light and weathering in 16 accordance with testing to EN12224 as part of a durability assessment in accordance I17 with IS013434:1999 7.2 18 6. All dimensions and values are typical unless otherwise stated. 19 I20 Alternate Structural Soil Reinforcement Materials — Alternate structural soil reinforcement 21 materials will be considered if submitted at least 15 days prior to bid letting in accordance with 22 the following conditions: 23 24 1. Geotextile materials shall not be considered as an alternate to geogrid materials for 25 subgrade improvement or base/subbase reinforcement applications.A geotextile may be 26 used in the cross-section to provide separation, filtration or drainage; however, no I27 structural contribution shall be attributed to the geotextile. 28 2. Alternate geogrid materials shall not be used unless submitted to and pre-approved in 29 writing by the Engineer. Consideration of alternate geogrid products will not be evaluated I30 based solely upon index and strength properties outlined in Section 2.02.A. In the event 31 that material index properties of an alternate product do not satisfy the requirements set 32 forward in this specification, then a separate design incorporating the alternate geogrid I33 product must be submitted for approval by the Engineer. Submittal packages for alternate 34 geogrid materials must be in the form of an engineered design certified by a licensed 35 professional engineer. Submittal must include, but not limited to, the following items: I36 a. Design pavement/unpaved surface typical section including the alternate 37 geogrid product 38 b. Letter summary of the alternate design describing the basis for design sealed by I 39 a licensed professional engineer. WEST MARINE VIEW DRIVE UTILITIES PAGE 86 OF 117 August 2018 WORK ORDER#3588 SPECIAL PROVISIONS I