Structures not only support gravity and other loads, but are essential to define form and space. To design structures in synergy with form and space requires creativity and an informed intuition of structural principles. The objective of this book is to introduce the principles as foundation of creative design and demonstrate successful application on many case studies from around the world. Richly illustrated, the book clarifies complex concepts without calculus yet also provides a more profound understanding for readers with an advanced background in mathematics. The book also includes structural details in wood, steel, masonry, concrete, and fabric to facilitate design of structures that are effective and elegant. Many graphs streamline complex tasks like column buckling or design for wind and seismic forces. The graphs also visualize critical issues and correlate US with metric SI units of measurement. These features make the book useful as reference book for professional architects and civil engineers as well as a text book for architectural and engineering education.