Table 12-5.—Hazard Class 1 Division Designators and Types of Hazards intended use. The divisions within Class 1 and the expected hazard for each division is listed in table 12-5. MASS-DETONATING HAZARD MATE- RIALS (CLASS 1, DIVISION 1).— Damage from mass-detonating hazard materials is caused by concussion or blast or by sympathetic detonation. Prescribed distances between piles of these materials and between magazines containing these materials must be maintained to minimize the possibility of sympathetic detonation or propagation. Ammunition and explosives that are considered mass-detonating hazards are Hazard Class 1, Division 1. NON-MASS-DETONATING HAZARD, FRAGMENT-PRODUCING MATERIALS (CLASS 1, DIVISION 2).— The principal hazards for items within this division are fragment and blast, either individually or in combination, depending on such factors as storage configuration, type of packing, and quantity. The designated minimum distances are based upon the limited range of fragments. These are the distances that must be used for protection of inhabited buildings and public traffic routes. Since fragment- producing materials can be grouped according to the range of the fragments produced, four fragment distance categories have been established. This permits flexibil- ity of storage. Most fragments produced by incidents in this division will fall within one of four specified minimum distances—400, 800, 1,200, and 1,800 feet. MASS FIRE HAZARD MATERIALS (CLASS 1, DIVISION 3).— Items in this division burn vigorously. There is little or no possibility for extinguishing them in a storage situation. Normally, explosions will be confined to pressure ruptures of containers and will not produce propagating shock waves or damaging blast overpressure beyond specified distances. A severe fire may result from the tossing about of burning container materials, propellant, or other flaming debris. Toxic effects, such as burning pyrotechnic items, will not normally extend beyond the inhabited building distances specified for this division. MODERATE FIRE HAZARD, NO BLAST MATERIALS (CLASS 1, DIVISION 4).— Items in this division present a fire hazard with no blast hazard and virtually no fragmentation or toxic hazard beyond the fire hazard clearance specified for high-risk materials. However, separate facilities for storage and handling of this division should not be less than 100 feet from other facilities. However, if the facilities are of fire-resistive construction, they may be 50 feet from each other. If devices containing explosives are such that accidental ignition during storage or transport will not cause external damage to the devices, either by fire, smoke, heat, loud noise, or by visible damage to the outer packaging, they are not considered Class 1 items. These devices may be considered inert for storage purposes and marked AMMUNITION NON- EXPLOSIVE for transport purposes. Certain articles within the division that contain one ounce or less of explosives have (based on test results) been classified as Class 1, Division 4S. These articles may be considered inert for storage purposes, and they are not subject to explosive transportation regulations. Articles containing larger quantities of explosives, also classified as Class 1, Division 4S, may be considered inert for storage purposes. However, they must be reviewed on an individual basis to determine whether explosive transportation regulations are applicable. VERY INSENSITIVE EXPLOSIVE ITEM MATERIALS (CLASS 1, DIVISION 5).— Items in this division are considered very insensitive when not stored or transported with other Class 1 materials. DOD considers these items to be the same as Class 1, Division 1, Compatibility Group D. There is very little probability of accidental explosion or transition from deflagration to detonation. The materials within this division are shipped as Q-D Hazard Class 1, Division 5. They are stored as Class 1, Division 1, Compatibility Group D. Normally, technical manuals do not present the hazard class, division, and compatibility group as they are written in previous paragraphs. For example, an item classified as Class 1, Division 5, Compatibility Group D, is written as Class 1.5D; or for an item in Class 1, Division 4, Compatibility Group S is written as Class 1.4S. Figure 12-1 shows Q-D information about Class 1.1 items. As you read this paragraph, refer to figure 12-1. Col 1 and Col 2 list the minimum and maximum 12-6