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iir: <br />I <br />I <br />N <br />fill <br />I <br />iu <br />0 <br />Ili <br />N <br />I <br />I[ , <br />n <br />Produce and supply concrete for the leveling pad meeting the requirements <br />of Section 347. Assume responsibility for performance of all testing required by <br />Section 346. Use Department approved mix designs. <br />548 -2.2 Reinforcing Steel: Meet the requirements of Section 931 utilizing Grade 60 <br />[4201 (Black) steel. <br />548 -2.3 Soil Reinforcement: For walls utilizing soil reinforcement, use reinforcement <br />consisting of steel wire mesh, metal strips or structural geosynthetics as required for the <br />wall system chosen. <br />Use steel wire mesh and embedded loops shop fabricated from cold drawn <br />steel wire meeting the minimum requirements of ASTM A 82, and weld into the finished <br />mesh fabric in accordance with ASTM A 185. Use steel strips hot rolled from bars to the <br />required shape and dimensions with physical and mechanical properties meeting <br />ASTM A 572 [ASTM A 572M] Grade 65 [4501 or as shown in the Contract Documents. <br />Use shop- fabricated hot rolled steel tie straps meeting the minimum requirements of <br />ASTM A 570 [ASTM A 570M], Grade 50 [345], or as shown in the Contract Documents. <br />Ensure that steel reinforcing strips, tie strips, reinforcing mesh and <br />connectors used in permanent walls are galvanized in accordance with ASTM A 123 <br />[ASTM A 1 23M] or ASTM A 153 [ASTM A 153M], as applicable. <br />Use structural geosynthetics made of polypropylene, select high density <br />polyethylene or high- tenacity polyester fibers having cross - sections sufficient to permit <br />significant mechanical interlock with the soil /backfill. Use geosynthetics having a high <br />tensile modulus in relation to the soil /backfill. Use geosynthetics having high resistance to <br />deformation under sustained long term design load while in service and resistant to <br />ultraviolet degradation, to damage under normal construction practices and to all forms of <br />biological or chemical degradation normally encountered in the material being reinforced. <br />Store the geosynthetics in conditions above 20 °F [ -7 °C] and not greater than <br />140 °F [60 °C]. Prevent mud, wet cement, epoxy, and like materials from coming into <br />contact with and affixing to the geosynthetic material. Rolled geosynthetic may be laid flat <br />or stood on end for storage. Cover the geosynthetic and protect from sunlight prior to <br />placement in the wall system. <br />Carefully inspect all reinforcement, steel and geosynthetics to ensure they <br />are the proper size and free from defects that may impair their strength and durability. <br />548 -2.4 Attachment Devices: Use soil reinforcement attachment devices as <br />required by the wall system chosen. <br />548 -2.5 Joint Materials and Filter Fabrics: <br />548 -2.5.1 Horizontal Joint Filler: Use elastomeric or polymeric pads /fillers in <br />all horizontal joints between precast components as recommended by the wall <br />manufacturer. Ensure that the pads are of sufficient size and hardness to limit vertical <br />stresses on the pad and concrete surface and to prevent concrete to concrete contact at <br />the joints. <br />548 -2.5.2 Joint Covers: Cover joints and other wall openings with geotextile <br />fabric meeting the requirements of Section 985 and Type D -5 of the Design Standards, <br />Index No. 199, Apply an adhesive approved by the Engineer to the back of the precast <br />component for attachment of the fabric material. <br />548 -2.5.3 Alignment Pins: Ensure that pins used to align the precast <br />components during construction are of the size, shape and material required for the wall <br />system chosen. <br />March 2007 01000 -122 <br />03- 4122.D <br />U; L L 1 <br />