CEMP-E
TI 850-02
AFMAN 32-1125(I)
1 MARCH 2000
(2) For tracks where cars are simply placed and removed (as distinguished from those where general
running or back and forth switching movements frequently occur) such as warehouse sidings and spur
tracks (dead end tracks), including loading and storage tracks, use table 2-2, "Light Use."
(3) For run-around tracks, passing sidings, yard tracks, wyes, balloon tracks, or other tracks where
switching movements commonly occur, use table 2-2, "10 MPH or Less."
b. Gradients.
(1) Gradients on running tracks through a terminal should not exceed 1.0 percent.
(2) On auxiliary tracks where cars may be temporarily left standing during switching, gradients should
generally not exceed 0.3 percent.
(3) Gradients on tracks where cars will be left standing for 1 or more days, such as loading, yard, and
storage tracks, should generally not exceed 0.2 percent, with a maximum allowable of 0.3 percent. It is
desirable to have these tracks slope away from the main track (or connecting track). Thus, if hand brakes
do not properly hold on cars, they would not roll toward the main track.
(4) Yards are best graded as shown figure 8-1, with tracks sloping toward the center, where storm
drainage is provided. This grading arrangement will prevent cars from accidentally rolling toward either
ladder track and will also facilitate drainage by collecting runoff at the center of the yard.
Figure 8-1. Typical Small Yard with Storm Drainage
8-2
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