Foundations, general.

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

age personnel in planning yard layout. The storage area

lumber in machine-stacked yards run at right angles to

is laid out to utilize the truck and railroad areas as main

the aisles with the boards parallel to the aisle. Storage

or longitudinal aisles with 24-foot cross aisles

blocks should not exceed 10 stacks in depth, preferably

intersecting the storage area at approximately 50-foot

stored in combinations of 5-5, 7-3, or 6-4 stacks in back-

intervals. This is sufficient storage depth to permit

to-back storage. The direction of the main aisles, those

stacking five stacks deep in back-to-back storage. See

from which the stacks are built or taken down, generally

chapter 3, section III, for stock numbering techniques.

is established by the nature of the yard site. Whether

main aisles run parallel with or at right angles to the

c. Foundations, general. Flat piling is satisfactory

direction of the prevailing winds probably will not affect

for inside storage, but it is recommended that all out-of-

ventilation and air movement through the yard due to

doors stacks be given a reasonable amount of slope.

cross aisles which run at right angles to the main aisles.

Slope facilitates runoff when water leaks through or

To permit rapid drying of aisles after a rainstorm or the

blows in at the sides of the stacks. This aids in keeping

melting of snow, it is advantageous to run the main

the lumber dry, thus preventing development of

aisles north and south. To increase air circulation within

conditions favorable to the growth of stain, decay, and

the stacks, an aisle 2 to 3 feet in width should be

attack by insects. When lumber is stacked in drafts by a

maintained between the rows of stacked lumber (fig 5-

forklift truck, changes in stack foundations over those

8).

This between-rows aisle will be of valuable

used for hand stacking are necessary. Also, efficient

assistance in issue and inventory functions. The stack

utilization of the fork truck in stacking operations

and aisle layout plan (fig 5-9) for shed and open storage

requires that the drafts be stacked parallel to the aisles

has been prepared to assist stor-

rather than at right angles. The top

Figure 5-8. Two-foot aisles maintained between rows of stacked lumber to facilitate flow of air through the

lumber yard.

5-10