Abstract
The new $7.6 million Main Street Viaduct in Pueblo, Colorado, is a six-span precast, prestressed concrete bulb-tee girder bridge, spliced together with post-tensioning. The overall length of the structure is 807 ft (246 m) with a maximum central span of 174 ft (53 m). There are eight girder lines with girders varying in depth from 72 in. (1829 mm) at the ends to 96 in. (2438 mm) at the center, creating an attractive haunched effect. The project was constructed within the designated 12-month time frame and was under budget. This article discusses the design alternatives and structural design considerations. Production, transportation and erection of the precast concrete components are also highlighted.
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