Specifications include, but are not limited to: Pole, Aluminum, Bolt Down, Type 30D6, Upsweep Double. ; The base plate shall be cast from either ASTM type 319 or 356T6 aluminum. The four elongated mounting holes shall be on 90-degree centers on an 11β bolt circle. ; The bracket mounting plates are to be cast from either ASTM type 713 or 356-T6 aluminum. They are to be welded to the poles at the indicated positions on the pole, 180 degrees apart, and 90 degrees from hand hole ; The hand hole shall be 4" x 6" nominal. A ΒΌβ-20 NC taped hole and bolt shall be provided in the shaft opposite the hand hole for grounding purposes. ; support a fifty pound fixture of an EPA of 3 on each arm when equipped with a pair of 8' upsweep arms.