タイトルまたは説明

The door is built up by 4 panels, 2 on each side which connected by hinges. On the close position, the 4 panels are on the same plane, during opening, the 2 panels on each side move into together and give the full opening. The door panel is coated with steel sheet outside and inside, and filled with heat insulating material. Various daylighting material options include glass, toughened glass, polycarbonate multi-wall sheet, polycarbonate compact sheet, etc are upon request.