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x) OSP Aerial — pole attachment, loose tube, with J -hook concrete pole y) OSP Aerial — pole attachment, loose tube, with J -hook wood pole z) OSP Aerial — place pole riser, 2", RGS aa) OSP Aerial — place pre -stressed concrete pole, 35', utility bb) OSP Aerial — place pre -stressed concrete pole, 45', utility cc) OSP Aerial — place pre -stressed concrete pole, 70', utility dd) OSP Aerial — place down guy anchor, 6' 7.8. PULL BOXES 7.8.1 General Requirements Furnish and install polymer concrete/fiberglass reinforced polymer pull boxes for fiber optic splicing, storing fiber optic cable, cable pull boxes, and noninvasive magnetic detection system appliances. Pull boxes shall be lightweight, high strength, resistance to sunlight, resistant to petrochemicals, unaffected by freeze/thaw cycles, straight sided, flush fit with sidewalk or grass, no grounding required, and be capable of anchor inserts to allow for mounting rail attachment. All fiber optic pull boxes shall be of one piece box construction. Approved fiber optic pull boxes for use in a fiber optic environment are as follows: Fiber optic pull boxes shall be manufactured of a composite mixture of polymer and concrete, and reinforced by a heavy -weave fiberglass, creating a material compressive strength of no less than 110 Psi. Each fiber optic pull box shall have a minimum design rating of 20,800 pounds, over a 10" x 10" area and be designed and tested to temperatures of -50° F. Supply fiber optic pull boxes with a heavy-duty cover having a minimum elastic design load of 20,800 pounds over a 10" x 10" area. All covers shall be produced to the AASHTO H-20 Cover Rating and meet a ASTM C857 load test of 20,800 pounds, performed as stated in AASHTO T280-87, "Standard Method of Testing For Concrete Pipe, Section, Or Tile", Section 5, and as referenced in ASTM C497. Supply a minimum of two (2) hex head bolts with washers to secure the cover to the fiber optic pull box. Any cover that has a length of above 39", shall be split or divided into two (2) equal lengths. Fiber optic pull box covers shall be embossed with "Fiber Optics" on the outside of the cover. fiber optic pull box covers shall have J -hook slots (1"W x 4"L). All pull box lids shall be embossed with "FIBER OPTICS". 7.8.2 Fiber Optic Pull Box Installation Process Prepare the excavation a minimum 6"-12" deeper than the depth of the fiber optic pull box. Add a minimum 6" of crushed rock for drainage as required, to bring the top of the box to finished grade level. Place fiber optic pull box in hole with top at grade level. While fiber optic pull box cover is in place, fill and compact soil to grade level. If grade level is raised later, the fiber optic pull box can be pulled up and bricked at the bottom with one (1) brick per side [a total of four (4)]. The cavity produced by this raising shall be eliminated by the addition of crushed rock. 7.8.3 Fiber Optic Pull Box Installation Conduit Entry Install 22.52 to 45 ° conduit sweeps into the fiber optic pull box. Conduit ends shall align in the pull box so the fiber optic cable is subjected to no more than 75% of the maximum bending radius of the cable. Provide and install a reinforced concrete apron around the installed pull box. 7.8.4 Fiber Optic Splice Vault 35