IDS prepared shop and erection drawings using TEKLA software for the development of new infrastructure and upgrades to existing facilities at Seattle-Tacoma International Airport, one of the busiest airports in the U.S. Most steel members were secondary steel, such as elevator sill angles, steel support plate members, wall supports, glass partition supports, and walkways. The structure also included miscellaneous steel items, such as roof access ladders, rail ramps, bollards, steel stair railings, and hard-stand gates.