EP 1110-1-17
16 Jul 99
3-3. Criteria for OB/OD Area Site Layout. The following discussion introduces the general
distance criteria to consider for siting a temporary OB/OD area. These distance criteria have been
developed to ensure that OB/OD operations can be safely conducted.
a. Personnel Separation Distance (PSD) Criteria.
(1) The minimum separation distances required between OB/OD operations and
personnel have been established in order to provide a degree of safety when establishing a
temporary OB/OD area. The safe separation distance for all personnel will be the greater of the
overpressure distance or the appropriate fragment range as determined by the maximum fragment
range or mitigated fragment range, but never less than 61 meters (200 feet). Table 3-1 presents
the default separation distances, as detailed in Chapter 5, Paragraph 5-7.c of DA Pam 385-64.
TABLE 3-1
Default Personnel Separation Distances From Aboveground Detonations1
Blast Overpressure Distance Meters
Fragment/
(Feet)
Debris Distance
Meters (Feet)
1/3
2
Non-fragmenting Explosive
D = 130Q , where Q in kg.
381 (1,250)
(D = 328W1/3 , where W in lb.)3
Material
Bombs and Projectiles of
D = 130Q1/3 , where Q in kg.
762 (2,500)
Diameter Less Than 127 mm
1/3
(D = 328W , where W in lb.)
(5 Inches)
Bombs and Projectiles With
D = 130Q1/3 , where Q in kg.
1219 (4,000)
a Diameter of 127 mm (5
(D = 328W1/3 , where W in lb.)
Inches) or More
D = 130Q1/3 , where Q in kg.
All Other Ammunition
762 (2,500)
(D = 328W1/3 , where W in lb.)
1
From DA Pam 385-64, Table 5-7
2
Q is the Net Explosive Quantity (NEQ)
3
W is the Net Explosive Weight (NEW)
(2) If known, maximum debris throw ranges with a applicable safety factor may be used
to replace the default personnel separation distances. Contact the OE Mandatory Center of
Expertise (MCX) for calculation of the maximum fragmentation distance. The personnel
separation distance is the maximum of this fragmentation distance, the blast overpressure distance
from Table 3-1, or 61-meters (200-feet).
(3) Multiple rounds may be demolished by a single detonation (consolidated shot) using
the procedures detailed in Appendix D. The personnel separation distance for a consolidated shot
is calculated as shown in Appendix D.
3-2
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