Due to light weight, erection ease, pre-assembly, and simple foundation design, guyed transmission structures offer a wide range of applications, from simple guyed wood poles to very large guyed steel latticed structures. This manual provides various analysis and design techniques applicable to all guyed transmission structures and covers guyed structures made of common materials including reinforced and prestressed concrete, aluminum, steel, and wood. The advantages and disadvantages of various types of guyed structures are presented, with an emphasis on typical guys, fittings, guy anchors, and foundations. Unique construction and maintenance problems are also covered.