111 Main-A Case Study Illustrating Vision, Integration, and Collaboration

摘要

Located at the heart of Salt Lake City's financial district, at the corner of South Main and East 100 South Street, 111 Main is a 25-story, 501,455 square foot Class A office tower that anchors a larger urban redevelopment project in the area. The construction of the building followed a parallel timeline with an adjacent project designed by another architect, the George S. and Dolores Dore Eccles Theater. The integration of the office building and theater design, a critical element in the city's downtown revitalization, contributes to the development of a walkable urban core and help to create a vibrant community. The office tower is LEED Gold and also supports Salt Lake City's commitment to increased urban density and long-term sustainability. The structural engineering of 111 Main reflects an innovative solution to a complex site challenge. To ensure the project would not compromise any of the theater's functionality, the entire structure is suspended from a steel hat truss on top of the building that allows the Eccles Theater to slide under the tower's south side. The 111 Main design vision was achieved by the project team-consisting of the owner, architect, engineer, general contractor, and subcontractors, by embracing common design goals and challenges through collaborative processes from initial design concept through final construction design assist phases. To permit the office tower and theater to proceed with construction independently, an innovative "saddle cable" temporary shoring support for the seven interrupted columns over the theater to the south side above Level 5 was developed integrated with the tower design. At the completion of the penthouse roof steel hat truss construction, loads from all 18 perimeter building columns were successfully transferred to the permanent structural system during a one-day 12-hour period. The lobby is enclosed by 35-foot-tall, ultra-clear, low-iron structural glass. The collaborative design team developed a sophisticated glass hinge system to meet this height requirement and mitigate seismic movement. The feature provides the office building with a high level of transparency, visually connecting its lobby interiors with the city outside. 111 Main's translucent glass fin facade reflects changing light conditions as the sun traverses the sky. The structural hat truss, situated behind a graduated translucent glass veil, is also visible in the sunlight and, when backlit, appears like a glowing lantern in the night. The result is a building that adds lightness and luminosity to Salt Lake City.