Ammunition and Explosive Storage Magazines
RC Arch 652-686 - 652-692
| Approved for New Construction | ECM Designation | Designer & Drawing Number | DDESB Approval Date |
|---|---|---|---|
| No | 7-BAR | OCE RC Arch 652-686 - 652-692 | 24-Dec-98 |
Files for Reference -
Digital Drawings -
Digital Drawings -
- PDF Version
(PDF 2.4 MB, 7 pgs)
- Approval Letter
(PDF 132 KB, 3 pgs)
Comments/Design Considerations -
This ECM design was tested as part of the 1964 Naval Proving Grouns, Arco, Idaho, test. The 130th ASESB (18 May 53) acknowledge COE Drawings 652-686 - 652-694, dated 27 Dec 41, revised 14 Mar 42, as a Standard ECM. I Dec 55 ASESB QD Standards list this ECM as a standard, with 185 foot separation for barricaded, 360 foot separation for unbarricaded. A 24 Dec 98 DDESB letter states that an ECM constructed to Drawings 652-686 - 652-692 is not robust enough to qualify as a 7-Bar ECM. However, it is robust enough to protect its contents if it is spaced about 400 feet from a detonation of 500,000 pounds NEW in an adjacent ECM. In addition, these ECM constructed with "Medium" or "Rock Only" footings do not satisfy present requirements for electrically continuous reinforcing steel, therefore ECM with these type footings do not meet current lightning protection criteria. Supereceded by 33-15-01.
This ECM design was tested as part of the 1964 Naval Proving Grouns, Arco, Idaho, test. The 130th ASESB (18 May 53) acknowledge COE Drawings 652-686 - 652-694, dated 27 Dec 41, revised 14 Mar 42, as a Standard ECM. I Dec 55 ASESB QD Standards list this ECM as a standard, with 185 foot separation for barricaded, 360 foot separation for unbarricaded. A 24 Dec 98 DDESB letter states that an ECM constructed to Drawings 652-686 - 652-692 is not robust enough to qualify as a 7-Bar ECM. However, it is robust enough to protect its contents if it is spaced about 400 feet from a detonation of 500,000 pounds NEW in an adjacent ECM. In addition, these ECM constructed with "Medium" or "Rock Only" footings do not satisfy present requirements for electrically continuous reinforcing steel, therefore ECM with these type footings do not meet current lightning protection criteria. Supereceded by 33-15-01.
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