1 MARCH 2000
other facilities, thus not requiring a large land area just for the balloon track. Balloon tracks have the
advantages over wyes of requiring only one turnout and a single movement to accomplish the turn. Wyes
require a backward movement to complete a turn, as well as throwing more switches. Wyes are often
created by installing the third leg where a junction already exists (or is required). In figure 8-8, for
example, the wye also allows convenient access to the warehouse track from either north or south
(5) When a yard or siding is located near the end of a route, a tail track is often added to allow
switching from the far end of the yard or siding. A tail track is most useful if it is at least three car lengths
longer than the siding or the longest track in the yard. Figure 8-8 shows a tail track north of the container
12. MISCELLANEOUS BUILDINGS.
a. Purpose. In each terminal area buildings may be needed for storage, shelter, and for other
purposes. At vehicle terminals, buildings will be needed for a crew and communications facility and for
blocking and bracing storage.
b. Crew and Communications Facility. The following should be considered when designing a crew and
(1) The building should be located as close to the loading area as possible without interfering with the
flow of vehicles between the staging areas and the loading ramps.
(2) The building should be large enough to accommodate the billeting of a rail loading crew.
(3) A telephone and a public address system would facilitate better command and control.
c. Blocking and Bracing Storage Facility. The following should be considered when designing a
blocking and bracing storage facility:
(1) The building should be located as close to the loading tracks as possible. Co-location with the
(2) The building needs to be large enough to hold the blocking and bracing material required for one
cycle of rail loading, that is, enough material for the maximum car capacity of the terminal.
13. SECURITY FENCING.
a. Requirement. Security fencing may be required to surround facilities within a terminal, or even a
complete terminal area. These fences are typically standard chain-link construction (i.e., 6-ft FE-5),
however a more secure fence (FE-6 or FE-7) may be needed. The installation Physical Security Officer
should be consulted to ensure that proper security requirements are considered in the design. All gates
and sally ports should be equipped with locking hardware.
b. Sally Ports. When designing a sally port, the following should be considered: