Alaska Airlines consolidated their base maintenance operations between Seattle and Oakland to streamline west coast operations for their entire fleet. The project involved an expansion, seismic upgrade, and tenant improvements of existing maintenance shops, hangars, and office to handle all FAA "heavy" checks of Boeing and McDonnell Douglas aircraft. The long-span steel roof truss hangar, originally constructed in 1957, consists of 43,000 square-feet of open floor space and 33,000 square-feet of office and shop space.

Need

The existing structure was constructed over 45 years ago and contained numerous seismic deficiencies. The facility needed to be expanded and modified to handle 737 and MD-80 aircraft as well as consolidated operations.

Result

Evaluated the structural condition and adequacy of the building, included long-span hangar roof, concrete shear walls, floor-framing systems, and fixed exterior hangar doors. Reid Middleton designed structural modifications to an existing fixed hangar door to allow independent movement of 737 and MD-80 aircraft within the base maintenance facility. Reid Middleton structural engineers also designed a new entry vestibule and new, elevated FAA inspector's offices as part of the renovation and expansion.