!The chair is composed entirely of sheet metal. A simple folding forms a strong structure using a very thin sheet metal. The procedure is easy, accurate and fast. These kinds of applications can be seen almost everywhere. The triangle rack of an air conditioner is a very good example of the use of sheet metal. A vertical triangle can sustain great weight. This aspect inspires me. The chair can be simply assembled by screws, and can be disassembled into one-quarter of its size."