Specifications include, but are not limited to: - Low Boy Trailer, 50 Ton, Double Drop Deck, Hydraulic Removable Gooseneck, w/o Engine to meet ARDOT Spec. 19-185A-084. Low Boy Trailer, 50 Ton, Rigid Neck, Three Axle w/Hydraulic Tail to meet ARDOT Spec. 19-186-084. 1. General: This specification is intended to cover a three axle, single drop, level deck, low bed semi-trailer designed to haul construction equipment. It shall be equipped with air ride suspension, a gooseneck mounted winch, a recessed hydraulic upper deck ramp and a hydraulically operated folding tail. 2. Capacity: Trailer shall have a minimum payload capacity of 100,000 pounds distributed, 70,000 pounds concentrated in any 10’ section, at no less than 50 mph. 3. Construction: Frame shall be of the “four main beam design”, utilizing four longitudinal steel I-beams with 100,000 psi minimum top and bottom flanges and 80,000 psi minimum web. The web material for the main deck shall be of a one piece design containing no splices. (If necessary, center beams may be tapered to allow the hydraulic recessed ramp specified in Paragraph 7 to set down into the bed when not in use.) Shall be all electric welded construction, meeting American Welding Society standards. The trailer frame shall be crowned to support maximum loads. Crossmembers shall be constructed of no less than 6” I-beam on not more than 8” centers, or, no less than 8” I-beam on not more than 12” centers. The frame shall be designed, constructed and rated for the full capacity of the trailer. 4. Dimensions: A. Main deck shall be same level from behind gooseneck to beginning of hydraulic tail. Deck width shall be 102”. Deck length from back of gooseneck to beginning of hydraulic tail shall be no less than 32’. Platform portion of hydraulic tail shall extend no less than 8’ behind main deck. Overall length of trailer shall be no less than 50’. Loaded deck height, measured at mid-point of deck, shall not exceed 36” . B. Gooseneck shall be full width of trailer and provide an upper deck area with a minimum platform length of 9’. Gooseneck shall have a vertical drop to the main deck. Shall have a king pin setting of no less than 15” but no more than 20”. Swing clearance behind king pin under gooseneck shall be no less than 84”. Fifth wheel loaded height shall be approximately 50”.