Ammunition and Explosive Storage Magazines
Steel, Semi-Circular Arch AD 33-15-70 R1
| Approved for New Construction | ECM Designation | Designer & Drawing Number | DDESB Approval Date |
|---|---|---|---|
| No | 7-BAR | AF Steel, Semi-Circular Arch AD33-15-70 R1 | N/A |
Comments/Design Considerations -
This ECM was required to be constructed IAW Drawing AW 33-15-64. A 13 Jan 1995 COE, Huntsville Division, letter stated that since the design drawing calls for it to be constructed in accordance with a standard (7-Bar) design, then, by analogy, it also should be considered a standard. Added to the magazine listing in DoD 6055.9-STD, based on COE analysis. COE structural evaluation of AW 33-15-64 door in 2003 determined the door would not provide 7 or 3-Bar protection.
The conversion of these designs from Standard magazines to 7-Bar magazines in the early 1990s was in error in that the hinged doors of AW 33-15-63, AW 33-15-64 and 33-15-65 (all similar door designs) are not capable of providing 7 or 3-Bar protection to their contents. This determination was arrived at during ESKIMO III, which tested a AW 33-5-64 design and by a structural analyses of the door design that was conducted by the Huntsville COE at the request of DDESB-KT. Paragraph C2.3.7.3. ESKIMO III, June 1974 provides further information regarding this test. If different doors than those shown of AW 33-15-63, AW 33-15-64, and 33-15-65 have been installed, then the headwall and alternate door(s) can be structurally evaluated to determine their strength. As a result of the ESKIMO series tests, Services began moving towards single and bi-sliding doors or hardened headwall pilasters and header.
Siting guidance: Do not use for new construction. Site existing magazines as Undefined structures to provide a higher level of protection to contents. Use of the K4.5 that is permitted for 7-Bar ECM (face-to-face) with intervening barricades or the K6 permitted for 7-Bar ECM (face-to-face) without a barricade provides a very high likelihood of prompt propagation between ECM designed to AW 33-15-63, AW 33-15-64 and 33-15-65.
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