Navy Hangar

KPFF provided civil and structural engineering services to renovate NASWI Hangar 5. Built in 1950, the building needed upgrades in order reach life safety, health, and environmental requirements, including seismic repair, anti-terrorism force protection improvements, SCIF security requirements, and Navy Marine Corp Internet standards. Hangar 5 was renovated to provide support for five EA-18G CVW Fleet Squadrons; the Electronic Attack Weapons School, and a Maintenance Department. The building was upgraded to conform to the Basic Safety Objective requirements ASCE-41 which required a complete upgrade to the existing structural system. A new 2nd floor structure was added at the end wings, as well as new stairs and elevators to the upper floors of the central bays. The project provides new trench drains in the hangar bays for a new aircraft under-wing Aqueous Film Forming Foam fire protection system. These new trench drains are connected to new above grade tanks, located outside of the flight-line fence. In addition to revising the water, storm and sanitary systems, adjacent to the building, the project provides new parking south of Charles Porter Avenue across from Hangar 5. This Design-Build project was for the renovation and seismic upgrade for a two-bay hangar structure (Hangar 6) and a single bay hangar renovation and expansion (Hangar 9). The construction cost was about $46M. The Hangar 6 building is a 100,000 SF steel framed, historic, hangar with two hangar bays, with four aircraft hangar doors, and staff/crew support structures on each side and between the hangars. In addition to the seismic upgrades, the project added a new AFFF firefighting system in the bays. Utility improvements included a new fire main loop around the whole hangar, new and re-routed storm drainage system, new natural gas service, and new exterior above ground AFFF storage tanks and force main supply line system. The concrete apron surrounding the building and leading up to the hangar bay doors was also replaced. This was necessary to provide a smooth connection from the hangar floor to the existing apron panels while maintaining a 1.5% maximum slope. The concrete panels consisted of 14-inches of concrete over 12-inches of crushed rock base material. New security controls were required for flight line access. These included security gates, guard shack, security fencing, protective bollards, curbing , and new parking lot layout.

Additional Services Provided:

• Renovation
• Antiterrorism Perimeter Security
• Blast Engineering
• Design-Build