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 MIL-HDBK-1013/12
Table C-7
Minimum Thickness of Thermally Tempered Glass (in.) to Survive Incident
Overpressure from 500-lb TNT, Aspect Ratio, a/b = 1.0
Standoff Distance (ft)
Plate
Dimensions
(in.)
a
b
60
100
200
300
12
12
3/8,
1/4
1/4,
1/8
1/8,
1/8
1/8,
1/8
18
18
1/2,
3/8
1/4,
1/4
1/8,
1/8
1/8,
1/8
24
24
3/8,
3/8,
3/8
3/8,
1/4
1/4,
1/8
1/8,
1/8
30
30
1/2,
1/2,
3/8
3/8,
3/8
1/4,
1/8
1/4,
1/8
36
36
5/8,
1/2,
1/2
1/2,
3/8
1/4,
1/4
1/4,
1/8
42
42
5/8,
5/8,
5/8
1/2,
1/2
3/8,
1/4
1/4,
1/8
48
48
3/4,
5/8,
5/8
5/8,
1/2
3/8,
1/4
1/4,
1/4
54
54
3/4,
3/4,
3/4
5/8,
5/8
3/8,
1/4
1/4,
1/4
1/2, 3/4,
5/8
3/8,
3/8
3/8,
1/8
60
60
3/4,
5/8,
1/2
Cross-section is too thick for typical security frame, requires
special consideration.
Table C-8
Minimum Thickness of Thermally Tempered Glass (mm) to Survive Incident
Overpressure from 230-kg TNT, Aspect Ratio, a/b = 1.0
Plate
Standoff Distance (m)
Dimensions
(m)
a
b
20
40
70
100
0.30
0.30
9, 6
6, 3
3, 3
3, 3
0.45
0.45
12, 9
6, 6
3, 3
3, 3
0.60
0.60
9, 9, 9
9, 6
6, 3
3, 3
0.75
0.75
12, 12, 9
9, 9
6, 3
6, 3
0.90
0.90
16, 12, 12
12, 9
6, 6
6, 3
1.05
1.05
16, 16, 16
12, 12
9, 6
6, 3
1.20
1.20
19, 16, 16
16, 12
9, 6
6, 6
1.35
1.35
19, 19, 19
16, 16
9, 6
6, 6
1.50
1.50
19, 16, 12,
19, 16
9, 9
9, 3
12
Cross-section is too thick for typical security frame, requires
special consideration.
140
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