Provide transformer bases that conform to the AASHTO “Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals” sixth edition with current interims. Ensure that each base has the following outside dimensions (+/- 1 inch): 17 inch high, 15 by 15-inch square bottom and 12 by 12-inch square top. Ensure that bases have a trapezoidal door with the following minimum dimensions (+/- 1 inch): 11 inch high, 9 inches across the bottom, and 7.5 inch across the top. Construct the door of an aluminum or stainless-steel material in a color that matches the base. The door should have a theft deterrent device that is equal to the LockDown LightPole lock door assembly or the Spanner Snake Eyes Security Bolt with 30 keys/opener tools supplied with the first shipment. Provide each transformer base with a 1/2-inch 13 UNC tapped hole or other suitable provisions for grounding purposes. Fasten each transformer base to the base flange of the pole with four loose galvanized bearing plates, four lock washers, and four galvanized steel connecting bolts and nuts. Use connecting bolts of the same diameter and strength as the anchor bolts. This shall be supplied in the hardware bag for this item. Submit mill test reports on the connecting bolts. The manufacturer shall specify the bolt circle and physical dimensions of the base bottom to ensure a proper foundation fit.
