IMEG provided structural, mechanical, electrical, plumbing, and communications design services for new and renovated facilities for the Special Operations Forces Aviation Foreign Internal Defense Operations and Maintenance Facilities at Duke Field. Demolition of two facilities was also included in the project scope.

The 78,700-sf new two-story 919th Special Operations Wing Facility supports 260 Special Ops personnel and 16 new Special Operations aircraft from four squadrons. Operational functions include logistics areas, a language center, briefing rooms, flight planning spaces, open storage classified operations area, and a Class “A” weapons vault. The facility was designed to achieve LEED Silver Certification.

The HVAC system includes multiple new chilled/hot water VAV air handlers, air terminal distribution systems with energy recovery units, and a centralized exhaust system. Heating and reheat demands for the facility are served by a natural gas-fired condensing type boiler (96% efficient). Domestic hot water is provided by a high-efficiency, gas-fired condensing water heater
(97% efficient).

Electric service is provided by a new 12470V to 480Y/277V, three-phase pad mount transformer and new 480Y/277V, three-phase, four-wire electrical service. Energy efficiency features include occupancy sensors and automatic shut-off, LED and fluorescent fixtures, and daylighting controls. Exterior building lighting uses photocells and time clock controls.

The facility has a structured cabling system capable of supporting analog and VoIP, non-secure NIPRNet, and secure data such as SIPRNet, SCAMPI, JIANT and SOIS. Security systems include an access control system. A paging system and rough in for A/V and closed circuit camera surveillance were included.

The facility is slab-on-grade with shallow concrete spread footings and a wide rib, type B metal roof deck on steel joints supported by steel frames. The second-floor framing system minimizes both weight and vibration while providing access flooring. The arms vault, designed according to MIL-HDBK-1013/1A, has 10-inch concrete ceiling over 8-inch concrete walls with offsetting bars over an 8-inch floor slab. Equivalent Lateral Force Procedure seismic analysis was conducted and AT/FP UFC 4-010-01 requirements were met.

The project also included new construction and renovation of the following support buildings:

Washrack Support Building: The 500-sf stand-alone facility provides office, toilet, and mechanical space to support washrack functions. HVAC design complies with ASHRAE 90.1 and includes a split system heat pump. The plumbing design for the wash rack system accommodates a high pressure (3,000 psi), four-station, variable pressure operation with a gas-fired hot water generating system. A structured cabling system capable of supporting voice and data was added. Structural systems include a pre-engineered metal roof, a slab-on-grade system with shallow concrete spread footings, with windows and doors designed to resist IBC load requirements.

B.3044 Office/Administration Facility: The 9,758-sf renovation replaced the HVAC system with a new chilled/hot water VAV air handler and air terminal distribution system. The chiller systems and piping were reused. New door and duct openings were provided and electrical fixtures were replaced in the renovated areas. A structured cabling system capable of supporting NIPRNet & SIPRNet and A/V rough-ins were provided.

AGE Covered Storage Building 3086: A 2,808-sf addition was designed to provide exterior covered storage and shading for the west side of the existing maintenance shop. The addition has a standing seam metal roof, slab-on-grade system with shallow spread footings.

Building 3115 Maintenance Squadron Command Facility: The 14,000-sf renovation converted the existing Avionics Maintenance Facility to a Maintenance Squadron Command Facility with three command suites, two reserve units, and one active duty unit. A new chilled/hot water VAV air handler and air terminal distribution system replaced the existing system. The chiller and boiler systems were reused and plumbing for domestic water and natural gas was provided. The existing 208Y/120V, three-phase, four-wire electrical system was reused and a structured cabling system was provided. AV infrastructure was designed.

Building 3117 Corrosion Control Facility: The 5,000-sf facility addition to the Aircraft Maintenance Shop consolidates the existing corrosion control operations, eliminating unnecessary transport of components and increasing efficiency. The addition includes a paint booth, blast booth, hand blast booths, and personnel locker rooms and toilets. The addition has a slab on grade foundation with shallow concrete spread footings and a standing seam roof deck on light gauge purlins, supported on steel moment frames. The exterior matches the existing facility.

Multiple split system DX heat pumps provide heating and cooling. The bead blast booth and paint booths have separate makeup air and exhaust systems, independent of the building HVAC system. A new 12470V to 208Y/120V, three-phase pad mount transformer, and 208Y/120V, three-phase, four-wire electrical service were provided and a structured cabling capable of supporting required wall-telephones was designed.