MIL-HDBK-1005/6
Section 12:
TRACK SCALES
Scales. There are two types of scales available for weighing cars,
12.1
static and weight-in-motion. See AAR Scale Handbook.
Static Scale. One car at a time is rolled onto the scale, stopped,
12.1.1
and weighed. The scale usually is a beam balance type, but can be a load cell
type.
Weigh-in-Motion Scale. This scale weighs cars coupled together
12.1.2
while being pulled over the scale by a locomotive at slow speed. The scale is
a load cell type.
Selection. If a scale is necessary, a static scale would probably
12.2
meet Navy needs. Weigh-in-motion scales are sophisticated devices used where
large numbers of cars are to be weighed each day.
Location.
Scales shall be located to minimize switching.
12.3
Alignment. A minimum of 100 feet of tangent tracks shall be
12.4
provided on scale approaches. Gradients should be less than 0.05 percent over
a static scale. Weigh-in-motion scales tracks should be level or slightly
upgrade allowing the train to be stretched during weighing.
Dead Rails. Where a by-pass track cannot be built around the
12.5
scale, use dead rails to gauntlet equipment not to be weighed over the scale.
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