Above-ground magazine.

TM 38-400/NAVSUP PUB 572/AFMAN 23-210 MCO 4450.14/DLAM 4145.42

Figure 2-9. Above-Ground Magazine

to store small arms ammunition, the warehouse is not

(b) Magazine. This type of structure is

classified as a magazine because it does not have the

designed for the storage of ammunition and explosives.

special design construction required for proper storage

These structures are widely separated in the storage

of ammunition and explosives.

area to minimize destructiveness should an explosion

occur. There are two types, above ground and earth

covered.

2. Earth-covered magazine.

1. Above-ground magazine.

(a) The

structure,

(a) This magazine is similar in

commonly referred to as an igloo, is generally

appearance to the general purpose warehouse;

constructed of reinforced concrete with an arch-type roof

however, it is built of fireproof materials and is well

covered with earth. The arched roof is an added safety

ventilated to lessen the danger of explosion (see fig 29).

feature since in the event of an explosion, the highest

It normally has a dock that runs the entire length of the

point of the arch which is also the weakest point would

building to service both truck and railcars.

collapse first, thereby lessening the damage caused by

the explosion.

Figure 2-10 shows two common

examples of igloos. Although igloos are not heated, the

(b) Inside the typical magazine,

temperature inside ordinarily ranges between 40 and

main aisles do not run the length of the building as is

45 in winter to between 60 and 70 in summer.

common in a general purpose warehouse. Generally,

cross aisles corresponding to the outside door locations

run from the front to the rear of the building. However,

(b) The typical igloo has a

in the instance of large-lot storage (e.g., a single item of

single door on only one end which is smaller than a

ammunition, etc.), aisles in certain sections of the

truck door; however, some have double doors. Truck

magazine may be eliminated.

doors are rare. Normally, a centrally located dock(s) is

constructed in the ammunition area to service trucks

and railcars.

may

necessary at times to use a general purpose warehouse

2-9