The following is general information pertaining to the various types of railcars found at naval
installations. See Figure 2-1.
a. Boxcars. Boxcars are utilized for the transportation of various commodities that need
protection from the elements and are not in a form compatible with bulk transfer methods.
Boxcars provide a good shell for secure blocking and storage. They are available in standard
interior lengths of 40', 50', and 60' and up to 86.5' in special service designs, with tonnage
capacities ranging from 40 to 100 tons. Cars vary in the length and type of doors, plug, sliding or
both, wall and floor construction, load securing systems, and degree and method of underframe
b. Tank Cars. Tank cars are utilized for the transportation of a wide variety of liquid
commodities. For the Navy the chief commodities are various petroleum fuels and contaminated
ship waste. Capacities range from 10,000 gal. to over 34,000 gal. Cars vary in construction
(riveted or welded), insulation, material (steel or aluminum), valve type and location, heating
method, if any, and undercarriage design (center or stub sill).