durable ammunition, such as aircraft bombs and depth
charges, in the open, provided it affords maximum
protection against corrosion and deterioration.
PREFABRICATED MAGAZINES.—Advanced
base
magazines
(fig.
12-2)
are
prefabricated,
earth-covered, arch-type structures that are used to
provide weatherproof storage for ammunition of all
types.
The barrel of each advanced base magazine is an
arch made of sheets of corrugated sheet metal bolted
together to form a semicircular-arch roof. Two
screened, sheet metal ventilators are mounted on top of
the arch, one at the front of the magazine and one at the
rear. The rear wall is constructed of corrugated sheet
metal.
The
front
wall
is
constructed
of
wide,
heavy-gauge metal plates, which are reinforced with
angles and channels. The front wall extends above and
to each side of the outer limits of the magazine,
providing retaining walls for the earth fill. The ends of
the plates that extend beyond the limits of the magazine
are secured to the structure by turnbuckle rods. The
magazine floor is a concrete slab placed on compacted
gravel or broken stone fill. A pair of 8-foot, double-leaf
doors is placed in the front wall of the magazine.
Screened louvers are placed in each door for
ventilation. Table 12-10 lists the available magazine
sizes,
maximum
storage
capacities,
and
the
recommended
separation
distances
between
the
magazines.
A barricade is placed opposite the front wall of
each magazine used for the storage of high explosives
or fuzes and detonators. The barricade extends to the
height of the inside crown of the magazine arch. The
barricade must be at least 3 feet wide at the crest and
slope to a grade on the natural slope of the earth used as
fill.
12-14
MAGAZINE
SIZE
MAXIMUM
CAPACITY
QUANTITY-DISTANCE
UNBARRICADED
QUANTITY-DISTANCE
BARRICADED
16 36
50,000
200 feet
115 feet
25 48
150,000
290 feet
165 feet
Table 12-10.—Prefabricated Advanced Base Magazines
Figure 12-2.—Typical advanced base magazine.
