UFC 3-520-05 is a Unified Facilities Criteria document titled "Stationary and Mission Batteries," current as of 1 May 2015, with Change 2 effective 9 January 2020 [UFC 3-520-05].
The document provides design criteria for stationary battery installations and applications including power plant backup power, substations, and switching stations [UFC 3-520-05 Appendix B]. It establishes requirements for emergency eyewash and safety shower facilities (located within 20 feet of battery enclosures), electrical receptacle provisions for battery chargers, and references related standards such as ANSI/ISEA Z358.1 for portable emergency facilities [UFC 3-520-05 para 3-10 and 3-11].
UFC 3-520-05 is cross-referenced in DAFMAN 91-203 for lithium-ion battery storage and ventilation requirements [DAFMAN 91-203 para 29.3.2], and in nuclear weapons facility criteria as a mandatory design standard alongside UFC 3-520-01 and UFC 3-550-01 [FC 4-420-07F para 3-2.1].
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DAFMAN 91-203 para 29.3.3, p. 331 (effective/current as of 2026-06-25)g, maintaining, or storage of each battery type will follow the manufacturer’s instructions and recommendations. (T-1) DAFMAN91-203 24 FEBRUARY 2026 331 29.3.2. For the architectural requirements for the storage, charging, ventilation, exhaust, and thermal management of Lithium Ion (Li-Ion) batteries for mobile applications and equipment, refer to UFC 3-520-05. (T-0) The installation of stationary battery applications using Li-Ion technologies are prohibited in occupied facilities per UFC 3-520-01. Installation BE will use ACGIH’s Industrial Ventilation: A Manual of Recommended Practice for Operations and Maintenance, to determine ventilation requirements. (T-0) 29.3.3. Doors. Battery shop exit doors will swing outwards. (T-1) Refer to paragraph 2.7 for roll up door requirements. 29.3.4. F
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