Architecture and building construction are in common somewhat, but they are different. In our readings, Ching mentioned that architecture is not only about the building, but also about scale, proportions, functional zoning according to a purpose and use, and the building coordinating with its environment. He also talked about the building systems which serves a specific purpose to the buildings. The Structural system is designed and constructed to support and transmit applied gravity; the enclosure systems are the envelope of a building that consists of the roof, exterior walls, doors, and windows; the mechanical systems provide the essential services to a building