| 摘要 |
PURPOSE: A prestress plate girder is provided to use steel materials effectively by controlling compressive stress and tensile stress to be equal. CONSTITUTION: The prestress plate girder(20) installed between a concrete floor plate and a pier to function as a support contains an upper flange(21), a web(22) and a lower flange(23), wherein the box-shaped lower flange(23) is provided with a tendon(24) to add prestress and filled with concrete(25).
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