MIL-S-62095C(AT)
3.4 Payload capacity. The rated payload capacity shall be not less than the weight computed from the rated liquid volume, using 1.0 kilogram per liter (KG/L) (8.3 pounds per gallon). Load bearing members shall be rated for the loads imposed with the tank in a horizontal position, and the liquid payload level in the tank.
* 3.4.1 Total axle load. The gross weight (curb weight plus payload) on the axle(s) shall not exceed 9070 kg (20,000 pounds) for single axle semitrailers, and 15 400 kg (34,000 pounds) for tandem axle semitrailers.
3.5 Dimensions and clearances. The semitrailer, uncoupled from the truck tractor, resting on its landing legs on level ground, without payload, and with the tank body within 1 percent of
level, shall conform to the dimensions specified in table I.
TABLE I. Dimensions and clearances.
Characteristic |
mm (Dimension or clearance) |
Overall length (maximum) |
9140 (30 feet) for size 2 9750 (32 feet) for size 4 |
Overall width (maximum) |
2440 (96 inches) |
Ground clearance (minimum) |
200 (11 inches) |
Upper fifth wheel height, from the ground to the underside of the upper fifth wheel plate, +25 mm (+I inch) |
1220 (48 inches) |
Distance from vertical centerliner of kingpin to front end of semitrailer (not less than) |
610 (24 inches) for size 2 910 (36 inches) for size 4 |
Landing wheel clearance - radius from vertical centerline of kingpin to any point 150 mm (6 inches) below upper fifth wheel plate (minimum) |
2130 (84 inches) |
Swing radius from vertical centerline of kingpin to most distant point on semitrailer nose (maximum) |
1330 (52.5 inches) for size 2 1420 (56 inches) for size 4 |
* 3.6. Frame. The semitrailer shall be of the frame or frameless type.
* 3.6.1 Stress analysis. The contractor shall perform a stress analysis. The analysis shall verify compliance with the requirements specified and shall include at least the following calculations
and diagrams:
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