12.9.1 Arms Storage
New Facility Criteria (AR 190-11 was revised on 15 Nov 2006).
If Category II arms are to be stored in new facilities built for the principal purpose of storing arms, the facilities will meet the following facility criteria.
12.9.1.1 Walls
Walls
will be of 8 inches of concrete reinforced with No. 4 reinforcing bars at
9 inches on center in each direction in each face of the wall.
Reinforcement in the 2 faces of the wall will be staggered on each face to
form a projected
grid approximately 4–1/2 inches square. Reinforcement in the walls will
be tied into floors and ceilings in accordance with American Concrete
Institute standards.
12.9.1.2 Ceilings and Roofs
Ceilings and roofs will be of reinforced concrete
construction. The thinnest portion may not be less than 6 inches. reinforcing bar spacing will form a
grid so that the area of any opening does not exceed 96 square inches using No. 4 bars or larger.
12.9.1.3 Floors
Floors,
if on grade, will be a minimum of 6–inch thick reinforced concrete
construction reinforced with 6 inches by 6 inches, W4 by W4 welded wire fabric or
equivalent steel reinforcing bars (based on area of steel per square
foot). Where the floor slab acts as the ceiling of an underlying room or
area, the ceiling standards will apply. Where equivalent steel reinforcing
bars are used, bar spacing will form a grid so that the area of any
opening does not exceed
96 square inches.
12.9.1.4 Door and door frames
The door will be GSA approved Class 5 armory door
per GSA Fed Spec AA–D–600D. A GSA approved Class 5 vault door is not encouraged due
to its electromechanical lock. Double door protection for arms storage facilities is not required. Door frames
will be per Fed Spec AA–D–600D
12.9.1.5 Windows and other Openings
Windows
are not authorized. Ducts, vents, and other openings of 96 square inches or
more with the least dimension greater than 6 inches will be secured in
accordance with 1 of the following methods and otherwise limited to the minimum
number and size that are essential
Sealed with material comparable to that forming the adjacent walls. fitted with any of the barriers below with bars or steel mesh
securely embedded in the structure of the building or
welded to a steel frame that will be securely attached to the wall with
fastenings inaccessible from the exterior of arms storage facility. Three–eighth
inch or larger hardened steel bars with vertical bars not more than 4
inches apart and with horizontal
bars welded to the vertical bars so that the openings do not exceed 32
square inches. A
minimum of 8–gauge high carbon manganese steel mesh with 2–inch
diamond grid. A
6–gauge cold drawn steel wire mesh with 2–inch diamond grid when
8–gauge mesh above is not available.
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