Covered Storage.

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

Figure 5-13. Method of building a roof into a draft of lumber.

(3) Other protection methods.

Boards,

(2) Paper or roll roofing protection method.

roofing, plywood, panels, corrugated aluminum, metal

Building paper or roll roofing may be combined with

sheeting, and other roofing materials also may be

boards to form a roof. The paper or roofing provides

combined to form roof panels. The panels may be used

watertightness, while the boards support the paper or

singly or doubly in the length of the stack. In all cases,

roofing in a flat sheet and permit the roof to be anchored

the roof should be raised several inches above the top

to the stack. The boards in this type of roof should be

course of lumber to permit movement of air between the

laid in a single layer and, roughly, edge to edge. The

roof and the top of the stack. Special roofing should be

boards forming the front and rear portions need not be

used only when lumber such as oak and other high

overlapped but can be butted over a central crosspiece.

grade lumber is to be stored for long periods of time for

Since this type of roof is tight, the pitch can be flatter

air drying or when, because of unusual conditions,

than one composed of a double layer of overlapping

thoroughly seasoned lumber must be placed in open

boards. The use of a combination of building paper or

storage.

roll roofing and boards probably is more applicable to

stacks of unitized lumber than to handstacked piles.

5-8. Covered Storage.

The paper or roll roofing can be laid in strips, running

either crosswise or lengthwise of the stack. When laid

a. Sheds-open. An open shed may be likened to a

crosswise, the strips should be lapped like shingles and

storage yard with a roof. In covered storage, however,

held down by three or more tie pieces running

lumber may be stored on level foundations, 12 inches in

lengthwise of the stack. When the strips are laid

height, as these stacks will not be exposed to rain or

lengthwise, a tie board should be placed over each lap.

snow and will not require slope to accelerate moisture

This type of roof consists of a double layer of boards

runoff. The open shed is advantageous for the storage

with paper or roofing between. The boards of each layer

of surfaced lumber or the better grades of lumber which

are laid with several inches between the edges. With a

are to be held in storage for a long period of time.

roof of this type, there would not be a need for the

Lumber having a moisture content in excess of 20

boards to overlap. There is a wide variety of papers and

percent, which eventually will require covered storage,

roofing on the market, and the choice of a suitable

may be sticker piled and placed in open shed storage for

material should be based on the life of the material with

air drying, as open shed storage has approximately the

reference to the length of time the stack is to stand in

same drying qualities as an open lumber yard. Lumber

the yard. It is probable that the most economical way

is placed into and removed from open sheds from the

would be to discard the paper or roofing when the stack

open sides; therefore, the areas adjacent to the shed are

is taken down.

utilized as working

5-15