Master the basics of roof-truss design for wood and steel with a clear, practical guide. This revised and enlarged edition brings together the essential methods for designing ordinary roof-trusses, aided by an introduction to the Elements of Graphic Statics. It is a compact reference aimed at students and engineers who want solid techniques they can apply in practice. The book covers core principles of equilibrium and force analysis, then moves into beams, trusses, materials, and joints. It provides data, design procedures, and practical examples to help you size members, choose joints, and evaluate loads for real-world roofs. Foundations in equilibrium, force polygons, and how to determine reactions and moments Design methods for wooden and steel roof-truss members, including joints, splices, and bearing Data and tables on timber, steel shapes, rivets, bolts, and fasteners used in trusses Guidance on wind and load transmission from roof coverings to trusses Ideal for readers of technical manuals and practitioners who design or study roof-truss systems.