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Table 1 Internal separation distances

Inter-magazine distances

Net explosive quantity (kg) Separation distance (m)
Hazard Type 1 Hazard Type 2 Hazard Type 4 Hazard Type 4
50 9 9 9 9
100 11 11 9 9
200 14 14 9 9
300 16 16 10 9
400 18 18 11 9
500 19 19 12 9
1 000 24 24 14 9
2 000 30 30 17 12
3 000 34 34 19 14
4 000 38 38 20 16
5 000 41 41 22 17
10 000 51 51 28 22
15 000 58 58 33 24
20 000 64 64 37 25
25 000 70 70 41 26
30 000 74 74 44 27
40 000 83 83 47 27
50 000 89 89 50 27
60 000 94 94 54 27
80 000 105 105 63 27
100 000 115 115 70 27

The distances for quantities of explosives less than 50 kg should be taken to be the same as for 50 kg unless the explosives inspector advises otherwise.

Where the quantity of explosives under consideration lies between two quantities given in the table, interpolation may be used to determine the separation distance.

For quantities of explosives in excess of 100 000 kg, the explosives inspector will advise the distance required.

Separation distances for Hazard Type 1 and Hazard Type 2 are based on there being mounding or other equally effective measures to intercept low angle high-energy missiles arising from an explosion of Hazard Type 1 or 2 explosives.

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Updated: 2011-10-21