Folding doors are not limited anywhere, and construction sites are increasingly diverse.
The number of apartments, housing, etc. and offices, shops, and pensions are increasing, and the number of folding door construction is increasing in schools these days.
Large spaces such as auditoriums can be used separately, and they can be installed in laboratories and science labs to accommodate the number of students to separate or expand the space.

Although most of the construction sites are completely transparent, Sadang Middle School has a translucent effect in the middle to enhance interior effectiveness and to prevent 100% exposure to the classroom or work, so it helps prevent eye distractions and increases concentration.