Improvised Explosive Device (IED) Safe Standoff Distance Cheat Sheet

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UNCLASSIFIED Improvised Explosive Device (IED) Safe Standoff Distance Cheat Sheet Building Outdoor Explosives Mass1 Threat Description Evacuation Evacuation (TNT equivalent) Distance2 Distance3 5 lbs 70 ft 850 ft Pipe Bomb 2.3 kg 21 m 259 m 10 lbs 90 ft 1,080 ft Suicide Belt 4.5 kg 27 m 330 m 20 lbs 110 ft 1,360 ft Suicide Vest 9 kg 34 m 415 m Briefcase/Suitcase 50 lbs 150 ft 1,850 ft Bomb 23 kg 46 m 564 m 500 lbs 320 ft 1,500 ft Compact Sedan 227 kg 98 m 457 m 1,000 lbs 400 ft 1,750 ft Sedan 454 kg 122 m 534 m 4,000 lbs 640 ft 2,750 ft Passenger/Cargo Van 1,814 kg 195 m 838 m Small Moving Van/ 10,000 lbs 860 ft 3,750 ft High Explosives (TNT Equivalent) Delivery Truck 4,536 kg 263 m 1,143 m Moving Van/Water 30,000 lbs 1,240 ft 6,500 ft Truck 13,608 kg 375 m 1,982 m 60,000 lbs 1,570 ft 7,000 ft Semitrailer 27,216 kg 475 m 2,134 m Fireball Safe Threat Description LPG Mass/Volume1 Diameter4 Distance5 20 lbs/5 gal 40 ft 160 ft - Small LPG Tank 9 kg/19 l 12 m 48 m 100 lbs/25 gal 69 ft 276 ft Large LPG Tank 45 kg/95 l 21 m 84 m Commercial/Residential 2,000 lbs/500 gal 184 ft 736 ft LPG Tank 907 kg/1,893 l 56 m 224 m 8,000 lbs/2,000 gal 292 ft 1,168 ft Butane or Propane) Small LPG Truck 3,630 kg/7,570 l 89 m 356 m Liquefied Petroleum Gas (LPG Semitanker LPG 40,000 lbs/10,000 gal 499 ft 1,996 ft 18,144 kg/37,850 l 152 m 608 m 1 Based on the maximum amount of material that could reasonably fit into a container or vehicle. Variations possible. 2 Governed by the ability of an unreinforced building to withstand severe damage or collapse. 3 Governed by the greater of fragment throw distance or glass breakage/falling glass hazard distance. These distances can be reduced for personnel wearing ballistic protection. Note that the pipe bomb, suicide belt/vest, and briefcase/suitcase bomb are assumed to have a fragmentation characteristic that requires greater standoff distances than an equal amount of explosives in a vehicle. 4 Assuming efficient mixing of the flammable gas with ambient air. 5 Determined by U.S. firefighting practices wherein safe distances are approximately 4 times the flame height. Note that an LPG tank filled with high explosives would require a significantly greater standoff distance than if it were filled with LPG. UNCLASSIFIED .

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