MIL-STD-2088B, DEPARTMENT OF DEFENSE DESIGN CRITERIA STANDARD: BOMB RACK UNIT (BRU), AIRCRAFT (29 MAY 2007)., This standard establishes the general guidelines and criteria for the design and development of a single store bomb rack unit (BRU) for carriage and release of airborne stores (excluding air-to-air missiles) on 14 or 30-inch suspensions from fixed wing and rotary wing aircraft.