Bridges – Girder
Reexamination Certificate
2005-09-24
2010-11-09
Addie, Raymond W (Department: 3671)
Bridges
Girder
C052S223110
Reexamination Certificate
active
07827642
ABSTRACT:
Provided is a hollow prestressed concrete girder for forming an I-type prestressed concrete girder bridge, in which at least one hole is formed in a body portion of the I-type prestressed concrete girder. A spliced hollow prestressed concrete girder bridge, in which a plurality of holes are formed in a body portion of the girder to reduce the weight of the girder, is constructed by carrying a plurality of spliced girders manufactured in a factory to a construction site, assembling the spliced girders in the construction site, first tensing steel wires installed at the entire girder, reinforcing a connection portion between spliced members by a steel rod or steel wire which is connected by welding or using a coupling or anchoring device at the spliced portion that connecting the spliced girders, installing the assembled girders that are first tensed on a pier, installing a continuous steel wire for connecting the installed spliced girders for a continuous bridge, pouring slab in the upper portion of the installed spliced girders, after the slab is cured, second tensing steel wires that have not tensed or the tensed continuous steel wire, and when cracks are generated or excessive sagging occurs after the bridge is constructed, additionally tensing the steel wires.
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Addie Raymond W
Park & Associates IP Law LLC
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