| 摘要 |
PURPOSE:To promote execution efficiency and high degree of accuracy of part of spiral stairs in a construction field. CONSTITUTION:A vertical bearing body (3) having a vertical slot (2) bored in the vertical direction along a newel post (1) is fixed to the newel post (1), horizontal bearing bodies (6) are arranged to the vertical bearing body (3) in the horizontal direction, and horizontal slots (4) of the horizontal bearing bodies (6) bored in the horizontal direction are intersected with the vertical slot (2) of the vertical bearing body (3). The intersections are fixed with clamping devices 5, tread receiving sections (7) from the horizontal bearing bodies (6) are horizontally extended, and treadboards (9) of stairs are borne on the tread receiving sections (7). |
