| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tread support structure at a winding stair part, which allows a receiver beam to be easily attached at a construction site of a wooden building, at reduced material cost. <P>SOLUTION: Receiver beams 22 and 23 are attached to columns 12, 13, and 14, or stud 16, which are arranged at a wall body 7 along the outside edge of a stairway, so that the side edges of treads 2, 3, and 4 are supported with the receiver beams. The receiver beams includes a fist horizontal part 22a which is horizontally attached to the columns or the stud, a vertical part 22c which extends upward from an end of the first horizontal part in approximately vertical direction, and a second horizontal part 22b which extends from the upper edge of the vertical part in the direction opposite to the direction in which the first horizontal part extends. The receiver beams includes a first component composed of a portion of the vertical part in the thickness direction connected to the first horizontal part and a second component composed of a portion of the vertical part in the thickness direction other than the portion belonging to the first component, which overlap the vertical part to be joined, constituting a member having a substantially continuous uniform thickness. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
