One of the office windows on the second floor of the new building was constructed with window-type folding doors.

As a total of 8 window-type folding doors, the color was designated as Brahman Gray color. Glass is a basic 16T double-layer glass, and it is constructed in blue+blue color.
As glass color is blue+blue instead of blue+transparent color, blue color is darker in double color, making it a cooler looking window.

The exterior window folding door should be used with a different lower rail than the normal folding door. To block rainwater from entering when it rains
The lower rail of the external containment method, which is different from the outside, shall be used.