Cylindrical Containers in Closed Cars.

TM 38-400/NAVSUP PUB 572/AFMAN 23-210 MCO 4450.14/DLAM 4145.12

Figure 3-24. Doorway area.

straight lines, as shown in part b, figure 3-26, there

3-74. Cylindrical Containers in Closed Cars.

would be no stability between the containers. This

a. Special problems of loading.

would be similar to trying to stack billiard balls one on

(1) Description.

Cylindrical containers

top of another as shown in part c, figure 3-26.

include steel barrels, drums, slack, and tight coopered

(4) Offset loading. The method of loading

wooden barrels, kegs, pails, and fiberboard drums. See

containers shown in part d, figure 3-26, is the preferred

AAR pamphlet 4 for more detailed information on the

method due to the stability obtained by offsetting the

loading of cylindrical containers.

containers. This method provides a two-point contact

(2) Shape affects stability.

Cylindrical

between containers and any force or pressure brought to

containers have a circular contour and when loaded in a

bear against a container is distributed to the adjacent

car, do not have complete face or surface contact or

containers. Other advantages are that this method

support between adjacent containers, which creates an

retards rotation of containers and will accommodate

unstable condition.

Many containers in use are

crosswise loading where drums will not fill the voided

constructed of lightweight materials that will flex, bend,

space.

or crush under concentrated pressure. Therefore, it is

(5) Diagram. It is necessary at times to load

necessary to have at least a two-point contact between

a desired number of containers in a car as shown in part

adjacent containers.

e, figure 3-26. However, there is a disadvantage to this

(3) Contrasted stability of square and

method since the containers tend to be forced into the

cylindrical shapes. The alignment in bearing surfaces

voided space at either side of the car. In the pattern

between containers having square or rectangular shapes

shown in part d, figure 326, this open space is divided

is shown in part a, figure 3-26. With the units placed as

into three smaller spaces.

illustrated, the construction resembles a multi-stored

(6) Importance of tight loading. Emphasis will

house. This arrangement provides complete stability for

be placed on tight loading. The proper positioning of

such containers. If cylindrical containers were placed in

3-57