REQUIRED DISTANCES FOR CLASS/DIVISION 1.1 ITEMS
TM 9-1300-206 contains tables of required distances based on NEW for the various QD class/divisions.
Figure 2-25 shows an extract of Table 5-3, which lists items in QD class/division 1.1.
Determining IBD and PTR Distances (Class/Division 1.1)
Table 5-4 in TM 9-1300-206 gives the IBD and the PTR distance based on the item NEW. An extract of
this table is shown in Figure 2-26.
For example, if 57,000 pounds NEW of class/division 1.1 items are present at a storage location, the
IBD is 1,565 feet, and the PTR distance is 940 feet.
The PTR distance is 60 percent of the IBD distance. This ratio is built into the tables. In the example
just shown, 940 is 60 percent of 1,565. The reason for this is spelled out in the extract from TM 9-
1300-206 shown in Figure 2-27.
Now try using the table. If you had 75,000 pounds NEW of class/division 1.1 items stored at a single
location, what would the applicable IBD and PTR distance be? Use Figure 2-26 to find the answer.
The solution is simple. You have exactly 75,000 pounds NEW (not over 75,000), so the IBD is 1,685
feet, and the PTR distance is 1,010 feet.
Since TM 9-1300-206 was published, a new minimum IBD of 1,250 feet for any class/division 1.1 item
has been established. See Figure 2-28. The following is an example of the 1,250-foot minimum IBD
requirement.
If you had 1,000 pounds NEW of class/division 1.1 items at a storage location, you would find a 400-
foot IBD requirement in Table 5-4. (Refer to Figure 2-26 on page 2-20.) However, you could not use
an IBD of 400 feet; you would have to use 1,250 feet. The same applies to the PTR distance. In this
example, you find the PTR is listed as 240 feet. However, 60 percent of 1,250 feet is about 745 feet.
What all this means is that you must ignore that part of Table 5-4 that shows IBDs of less than 1,250
feet.
Determining Intraline Distance (Class/Division 1.1)
Table 5-5 in TM 9-1300-206 shows class/division 1.1 intraline separation requirements. An extract of
this table is shown in Figure 2-29.
At this point, take a moment to review the term "intraline." (Refer to Figure 2-15 on page 2-12 and
Figure 2-16 on page 2-13.)
As you look at the extract of Table 5-5 shown in Figure 2-29, find the column headings "Bar." (for
barricaded) and "Unbar." (for unbarricaded) under the column "Distance in feet."
"Barricaded" means that an effective barricade exists between the magazines, operating buildings,
stacks, or other buildings opposed one to another. Figure 2-30 shows an example of a barricade
between stacks of munitions. Barricades are normally constructed of earth, although they may be
made using a combination of earth and wood or even concrete.
"Unbarricaded" means that effective barricades between the magazines, operating buildings, stacks, or
other buildings opposed one to another are lacking.
Table 5-5 (refer to Figure 2-29) is used in much the same way as the IBD and PTR distance table
(Table 5-4, shown in Figure 2-26) previously discussed. The NEW of class/division 1.1 items is shown
in the first two columns; the required intraline separation in feet is shown
MM0168
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