CEMP-E
TI 850-02
AFMAN 32-1125(I)
1 MARCH 2000
(8) Where overhead power lines in excess of 600 volts cross over the track, the rails will be made
electrically continuous and grounded for a distance of 150 ft on each side of the power lines.
c. Track Scales.
(1) When required, track scales will be designed and installed in accordance with the AAR Scale
Handbook, which appears as an appendix in the AREMA Manual.
(2) The design and construction of track scales is best performed by a commercial firm that
specializes in design, fabrication, and construction of railroad track scales.
d. Bumping Posts and Wheel Stops.
(1) Bumping posts, wheel stops, or timber and earth mounds should be used at the open end of all
stub tracks to prevent cars from rolling off the end of the track.
(2) Where it is not critical that railroad cars be absolutely stopped at track ends to protect personnel,
facilities, or parked vehicles and equipment, and where no other hazards are present, consideration
should be given to using low earth mounds or some type of wheel stop at the end of the tracks rather than
coupler-height, solid bumping posts, or obstructions.
e. Roadway Fencing. The character of the land use of property adjacent to the railroad and security
requirements will govern the need for fencing along the right-of-way lines. The installation Physical
Security Officer should be consulted to ensure that security fencing requirements are covered in the
design.
f. Snow Fences. Chapter 1, part 6 of the AREMA Manual provides guidance on the application and
construction of snow fences and other measures to minimize snow drifting on the track.
g. Cattle Guards. In areas where livestock or other large animals could enter the railroad right-of-way at
road crossings, cattle guards may be necessary.
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