Category IV. Ammunition and explosives listed under category IV are stored according to the applicable
guidance. Structures without alarms must be checked by a security patrol at irregular intervals not to exceed 48
hours. Patrol checks are not required for IDS-protected facilities. New IDSs may not be programmed for
category IV storage facilities, unless they are determined necessary based on an assessment of local threats,
vulnerabilities, and cost effectiveness.
Items used as training devices (such as inert and expended light antitank weapon [LAW] launcher
tubes, inert Claymore mines and hand grenades, and the M190 rocket launcher with the M73 sub-caliber
practice rocket) are vulnerable to pilferage, misuse, or conversion to live ammunition. Such devices and
training aids must be conspicuously marked to prevent their accidental turn-in, or their turn-in as live-fire
residue. Those items that can be converted to live ammunition or explosives must be accounted for and
secured in the same way as category IV live ammunition and explosives.
Modifications to Facilities
The provisions of AR 190-11 are mandatory for new construction of permanent, land-based installations for the
storage of sensitive arms, ammunition, and explosives (AA&E). Modifications to existing facilities are performed
as described in the paragraphs that follow.
The tearing down and rebuilding of facilities is not undertaken unless the MACOM has determined that existing
security measures cannot be supplemented to provide the required degree of protection.
When nonstandard structures or facilities provide equivalent or better protection, modifications are not
The upgrading of existing storage structures must be consistent with approved plans for future development and
new construction plans. The type, planned use, modification costs, and remaining economic life of storage
structures must be considered. In determining upgrade requirements, ammunition and explosives must be
consolidated by risk category to the maximum extent consistent with operational, safety, and training
requirements. Adequate compensatory security measures are established for AA&E storage structures that do not
meet minimum construction standards. Definitive drawings and specifications for the new construction,
upgrading, or modification of AA&E storage structures must be coordinated with the engineer office, the safety
office, the law-enforcement agency (LEA), the program management office (PMO), and the security police office
to ensure that safety and physical security requirements are met.
Qualified engineer personnel must verify the structural composition (including the walls, ceilings, roofs, floors,
and doors) of AA&E storage facilities. These personnel prepare DA Forms 4604-R (Security Construction
Statements). An example of a completed DA Form 4604-R is shown in Figure 3-1. These forms must indicate
the highest construction category met by the facility for the storage of AA&E, and the date of the applicable
regulation. A DA Form 4604-R is posted in each AA&E storage facility. This form may be reproduced locally
on 8 1/2-by 11-inch paper. A reproducible copy of DA Form 4604-R is located at the back of AR 190-11.
A blanket DA Form 4604-R may be issued at an installation for all facilities (such as ammunition magazines)
constructed according to the same specifications. Under these circumstances, a copy of the form need not be
posted in each individual storage structure, but it must specifically identify the facilities by number and location
and be readily available for inspection. Security construction statements are reviewed during physical security
inspections. The DA Forms 4604-R must be revalidated by engineer personnel every five years.