| 摘要 |
PROBLEM TO BE SOLVED: To provide a beam which is made hard to bend and can be inexpensively erected and joined between a pair of columns having different structural forms. SOLUTION: This beam 1 is constituted by providing a steel-frame beam part 5 on the side of one end 4A of a main body part 4 of precast concrete(PC) construction, so as to make both ends of the beam 1 have the different structural forms. Because both of the ends of the beam 1 have the different structural forms, the beam 1 can be adapted to the respective different structural forms of the paired columns, so that beam-column jointing can be performed by a general execution method in a case of construction of a hybrid-structure frame in order to enable shortening of a construction period and cost reductions. In addition, the precedent introduction of compressive stress into a cross section of the body part 4 can prevent cracks from being caused to the tension side of the beam 1 so as to cause bending.
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