MIL-DTL-62164E(AT)
American Railroads, "Rules Governing the Loading of Commodities on Open Top Cars"
(see 4.5.2).
3.4.2 Transport by water. The semitrailer shall be provided with anchor shackles to
permit four-point lifting for loading and unloading and with tiedowns for securing the unloaded
vehicle when being transported by ships (see 4.5.2).
3.4.3 Transport by air. The semitrailer shall be transportable in airborne operations. Air
transportability shall be for type C-5A aircraft and shall meet the requirements of
MIL-HDBK-1791 (see 4.5.2).
3.5 Performance. The semitrailer, fully equipped and serviced, coupled to the tractor,
and loaded with 105 000 lbs payload shall meet all the requirements specified herein, without
failure or damage to vehicle and payload. Performance shall be demonstrated on dry, smooth,
relatively level, hard-surfaced roads, free from loose material, except as specified herein
(see 4.5.3).
3.5.1 Environmental. The semitrailer and its components shall withstand and operate in
ambient air temperatures of +125F to -50F, with no special preparation. The complete vehicle,
when in storage, shall withstand climatic extremes as specified in MIL-HDBK-210 without
deterioration, that may cause failure of any part of the vehicle (see 4.5.3.1).
3.5.2 Road speed. The semitrailer shall be capable of being towed at a speed of not less
than 34 mph (see 4.5.3.2).
3.5.3 Grade and slope operation. The semitrailer, loaded with a rated payload, shall
function headed up and headed down slope on longitudinal grades not less than 15% and across
side slopes of 20% with each side of the vehicle up slope. As a result of the operation, no
evidence of faulty lubrication, leakage or other malfunction shall be found (see 4.5.3.3).
3.5.4 Braking ability.
3.5.4.1 Service brakes. The service brakes, without the aid of the prime mover brakes,
shall stop the tractor and semitrailer with the rated payload within 100 ft upon steady semitrailer
brake handle application (in prime mover), when traveling at 20 mph to insure proper
functioning and adjustment of the brake (see 4.5.3.4).
3.5.4.2 Failsafe brakes. With the service brakes in proper adjustment, the failsafe brakes
shall function properly to hold the vehicle. The failsafe brake system, when activated, shall hold
the vehicle with rated payload on a 15-degree () longitudinal slope (see 4.5.3.5).
3.5.4.3 Failsafe release system. The failsafe brake system release, when pressurized to
90 psi, shall fully release the brakes (see 4.5.3.6).
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