| 摘要 |
PURPOSE:To facilitate adjustment by forming a supporting leg, the length of which is adjustable on a base installed on a ground side, and by forming a supporting member for putting the lower end of an open string on the upper end of the supporting leg and thus for fixing it. CONSTITUTION:A supporting leg 14 is fixed to the center part of a base 11 in an integrated manner, and the leg 14 is fixed by a pair of upper and lower cylindrical nuts 15, 16, and by a male screw 17, the both end of which are screwed into the nuts 15, 16. End plates 26, 26 are preliminarily welded to the lower end of each open string 25, 25 of an exterior staircase 24, and the plates 26, 26 are put on the upper surface of a supporting member 20 of a supporting anchor 23. A bolt hole 27 provided on the plate 26 and a bolt hole 22 provided on the member 20 are made identical, and the plate 26 is fixed by pushing in a bolt 28, and the plate is put on a base concrete 29. The lower side from the lower end part of the beam 25 is covered with floor concrete, while the screw 17 is turned so as to adjust the height, and the correction in the horizontal direction is carried out by striking and so on the side surface of the plate 26 by a hammer and the like. The adjustment of the height as well as the position can thus be facilitated. |
