Specifications include, but are not limited to: TRAIL KING model TKD22-402, RANCO model LW2140, or State of Alaska approved manufacturer and model; provided all of the following minimum specifications are met. Any other manufacturer and model offered must be pre-approved prior to bid submittal. PERFORMANCE: Highway Application: Must be capable of carrying a minimum of 3,000 pounds per cubic yard struck capacity, at minimum 55 MPH. CAPACITY: 20 cubic yards, struck, minimum. Side boards used to obtain the minimum capacity are not acceptable. DIMENSIONS: Overall length, not to exceed 40 feet (length does not include push block). Overall width, not to exceed 8.5 feet (102 inches). Overall height, not to exceed ten (10) feet. A fifth wheel plate height of 48 to 52 inches is required. King pin plate shall be oscillating type. Swing clearance shall be a minimum of 84 inches Gate clearance to ground, empty, gates closed, minimum 13 inches. CHASSIS: The trailer shall be of all steel construction, combination 100/80 PSI steel strength. Hardware to be grade-8. Axles: To have two (2) axles with dual wheels. Track to be approximately 77 inches. Oil seals to be STEMCO or equivalent. Each axle to have minimum 25,000 lb. capacity. Axle spacing to be approximately 49 inches. Suspension: HUTCH H-900, or equivalent. Tires and Wheels: