The apartment construction site that was constructed this time is not the entire interior construction, but the folding doors are already being constructed in the residential area. In this case, the wallpaper, floorboards, interior accessories, and appliances are located, so the construction is carried out differently from the usual construction methods. The existing shot seat is not removed, but only the windows and doors are removed, and the folding door lower rail is inserted on the existing shot seat (high shot time).

With this method of construction, it is called the One Day Construction Method.​

The construction work is completed on the same day because the folding door installation time is fast due to the construction method that does not require demolition work. This method does not remove the existing shot sheet, so there is no additional cost of removal, and there is no damage to the wallpaper, floorboards, or appliances that have already been constructed.

It is a folding door with a 90% or more opening and closing rate and opens and closes it according to your needs to increase space utilization. Even if the lower rail is inserted into the frame during the shot, the lower rail does not rise higher, but maintains the original frame height, which does not cause any inconvenience to the traffic. It has a wide expansion and a large living room space, but it can maintain pleasant indoor air with fast air circulation.