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Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.
From 1982 to 1986, the original bridge deck, in 747 sections, was replaced with lighter, stronger orthotropic steel deck panels over 401 nights without closing the roadway completely to traffic. [5] The project not only restored the bridge to prime condition but also reduced the deck weight by 12,300 tons (11,160 metric tons ).
One re-used deck panel will be placed on newly constructed abutments to replace the aging Sugar Creek Bridge, built in 1939. Another deck panel will become part of a multi-girder bridge replacing ...
The decks of each span are composed of precast concrete panels, connected underneath by "edge girders" running parallel to the edges of each deck, as well as floor beams running perpendicularly to the deck. The cable stays are anchored to the outer faces of the edge girders underneath each span. [67]
Senator William V. Roth Jr. Bridge in Delaware is a cable-stayed bridge using precast concrete segments for the approach and center spans; Vancouver SkyTrain's Millennium Line as well as the elevated portion of the Canada Line; Linn Cove Viaduct in the Blue Ridge Mountains, North Carolina (precast) Manwel Dimech Bridge in St. Julian's (San ...
Alex Fraser Bridge, Canada, the longest cable-stayed bridge in the world when built, was the first cable-stayed bridge to incorporated the use of long lay cables, the first concrete deck acting compositely with the girders, the first use of precast deck panels, the first “tuning fork” towers, and was the first to be designed to modern North ...
Over the next three years, the original cast-in-place concrete bridge deck was removed and replaced using full-depth, precast, prestressed, half-deck width concrete panels. It was necessary to complete one lane at a time, starting with the south lane, leaving the other deck in place so the bridge could continue to be used for vehicular traffic.
When a bridge deck is installed in a through truss, it is sometimes called a floor system. [1] A suspended bridge deck will be suspended from the main structural elements on a suspension or arch bridge. On some bridges, such as a tied-arch or a cable-stayed, the deck is a primary structural element, carrying tension or compression to support ...