The book covers the teaching needs of the course titled "Technical Designs" in the Department of Civil Engineering at AΠΘ. Understanding the basic principles of design is a prerequisite and tool for the comprehensive training of potential Civil Engineers. In the world of engineering, technical drawing is a global code of communication. Therefore, the book is also addressed to students from other departments of Polytechnic Schools and Technological Educational Institutions with relevant study subjects. It is also addressed to all those interested in learning technical drawing, including candidates who wish to join architectural schools.