| 摘要 |
The present invention relates to an assembly type spiral stairs precisely and freely controlling a height between footholds to simply be assembled and installed in a construction site having a different inter-layer height. The present invention comprises: a base fixated to a floor; a center pole of which a lower end is installed in the base; a plurality of spacers inserted into the center pole; the foothold inserted into the center pole between the spacers; an outside stringer disposed on one side of the foothold; and a coupling member coupling an other side of the foothold and the outside stringer. |
