| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a frame structure of a rear tower of a girder erection device capable of certainly conducting a girder erecting work at a narrow place.SOLUTION: A frame structure 100 has enlarging parts 42A and 42B for enlarging a size in a width direction of an inside area E between pier studs 21A and 21B at a midway position of body parts 41A and 41B of the pier studs 21A and 21B. Therefore, even if a distance in a width direction between the enlarging parts 41A and 41B of the pier studs 21A and 21B is shortened in order to enable a girder erecting work at a narrow place, when a girder material 3A passes through the inside area E of a rear tower 6, the girder material 3A can pass through without causing interference with the rear tower 6 by passing through the enlarging parts 42A and 42B, which were enlarged in the width direction. When the girder material 3A is hung, the enlarging parts 42A and 42B are supported by arranging supporting parts 51A and 51B between lower bend parts 43A and 43B and upper bend parts 44A and 44B.</p> |
