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 MIL-HDBK-1013/12
Table C-45
Minimum Thickness of Polycarbonate (in.) to Survive Incident Overpressure from
500-lb (230-kg) TNT, Aspect Ratio, a/b = 2.0
Standoff Distance,
Plate
ft
Dimensions,
in. (m)
a
b
60
100
200
300
(20 m)
(30 m)
(60 m)
(90 m)
24
12
7/8
3/8
1/4
1/4
(0.60)
(0.30)
(22 mm)
(9 mm)
(6 mm)
(6 mm)
36
18
1 1/4
5/8
3/8
1/4
(0.90)
(0.45)
(32 mm)
(16 mm)
(9 mm)
(6 mm)
48
24
1 1/2
3/4
1/2
3/8
(1.20)
(0.60)
(38 mm)
(19 mm)
(12 mm)
(9 mm)
60
30
1 3/4
7/8
1/2
3/8
(1.50)
(0.75)
(44 mm)
(22 mm)
(12 mm)
(9 mm)
72
36
1 7/8
1
5/8
1/2
(1.80)
(0.90)
(48 mm)
(25 mm)
(16 mm)
(12 mm)
84
42
2 1/8
1
5/8
1/2
(2.10)
(1.05)
(54 mm)
(25 mm)
(16 mm)
(12 mm)
Table C-46
Minimum Thickness of Polycarbonate (in.) to Survive Incident Overpressure from
1000-lb (460-kg) TNT, Aspect Ratio, a/b = 2.0
Plate
Standoff Distance,
Dimensions,
ft
in. (m)
a
b
60
100
200
300
(20 m)
(30 m)
(60 m)
(90 m)
24
12
1 1/4
5/8
1/4
1/4
(0.60) (0.30) (32 mm)
(16 mm)
(6 mm)
(6 mm)
36
18
1 5/8
7/8
3/8
3/8
(0.90) (0.45) (41 mm)
(22 mm)
(9 mm)
(9 mm)
48
24
2 1/8
1
1/2
3/8
(1.20) (0.60) (54 mm)
(25 mm)
(12 mm)
(9 mm)
1 1/8
5/8
1/2
60
30
2 1/2
(1.50) (0.75) (64 mm)
(28 mm)
(16 mm)
(12 mm)
72
36
2 7/8
1 1/4
3/4
1/2
(1.80) (0.90) (73 mm)
(32 mm)
(19 mm)
(12 mm)
84
42
3 1/4
1 3/8
3/4
5/8
(2.10) (1.05) (83 mm)
(35 mm)
(19 mm)
(16 mm)
Cross-section is too thick for typical security frame,
requires special consideration.
162
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