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MIL-HDBK-1013/1A
Table 46
Construction for Ballistic Resistance
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*
*
*
Wall Thickness, inches (millimeters)
*
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*
*  Reinforced  *
*
*
*
*
CMU,
*
*
*  Normal
*
*
*  Bullet-  *
Concrete
Steel Plate
*  Threat  *  (3,000 psi) * Thickness *
/)))))))0))))))))))1 Resistant *
* Severity *  (21,000 kPa)* (Grouted) * Brick *  Mild *  Armor
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*Low
*
*  4
*  1/4
3/16  *
*
2
4
5/16
*
*  (100)
*(100)  *  (6m)
(4.8mm) *
*
(50)
(8)
*
*
*
*
*
*
*Medium
*
*  4
*  5/16
*
*
2 1/2
4
1/4
7/16
*  (100)
*(100)  *  (8m)
(6mm)  *
*
*
(64)
(14)
*
*
*
*
*
*
*High
*
*  8
*  9/16
7/16  *
*
4
8
1 1/8
*
*  (200)
*(200)  *(14.3m)
(14mm) *
(28.4)  *
(100)
*
*
*
*
*
*
*Very High
*
* (a)
* 13/16
11/16  *
*
12
(a)
(a)
*
*
*
* (21mm)
(17.4mm)*
*
(300)
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(a) Not applicable.
c)  High level of threat protection.  Select wall
construction which resists the high-severity ballistics from Table 46.  Wall
materials include reinforced concrete, CMU, brick, mild steel or rolled
homogenous armor plate, or bullet-resistant fiberglass.
d)  Very high level of threat protection.  The SAMIT threat
is difficult to protect against. Effective protection, however, can be
provided with appropriate design.  Use a 10-gauge (3.4-mm) face plate over
suitable cast concrete or filled concrete walls as shown in Table 47.
Application of the 10-gauge (3.4-mm) steel plate on the back side of the
wall, instead of the front, is not sufficient to stop penetration.
3)
Doors.  Because openings often are perceived by attackers to
be more vulnerable than walls, minimize the number of exterior doors to limit
potential targets.  Bullet-resistant doors are available in a variety of
sizes and styles, but most fit into one of two categories: opaque or
transparent doors.  Opaque doors normally are constructed of steel or
aluminum armor plate and in some cases thicker plates of mild steel.
Bullet-resistant plates are either on the face of the door and frame or are
part of the core of the door and frame.  Door frames normally are constructed
of steel or aluminum sections and are filled with metal or plastic to ensure
ballistic integrity.
Where a glazed door is required for safety, e.g., to avoid opening
a door into a pathway, use the smallest possible glazing area to reduce
exposure
204








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