Eboni Lacey 
09/23/2010
Professor Neil Lawley 
Ch. 6 and 9 summary 

Ch. 9 Summary 
	Ch. 9 is mainly devoted to structure and how to manipulate it. Through compression, tension, bending, torque, and sheer, structure is manipulated. These types of force ultimately distort a structure.  It then discusses ways to distribute force and defines geosides, which are structure lines that lie on a great surface of a sphere. It goes on to talk about surface structures such as shells and tensile surfaces. It then concludes with the joining and attachment. Through focusing on the structure’s center of gravity, the stableness is determined. The closer the center of gravity is to the center of the base, the more stable the structure. It also includes hierarchical and repeated structures.