Training Manual . M. : MGSU, 2012. 112 s. Information about the main existing methods of welding. Describes the main technological processes occurring under different welding methods, equipment and materials, discusses the main advantages and disadvantages of each type of welding Ways to increase the strength and weldability of welded joints, as well as their quality control . are considered. The basics of the theory of the formation of welding stresses and deformations and measures to reduce them and the basics of the technological process of manufacturing welded building metal structures . For students of full-time and correspondence departments of the Institute of IHES, as well as externality in the study of the section "Welding", provided by the discipline "Metal structures, including welding" . Content. Foreword by . Basic information about welding. Historical outline of the development of welding production . Classification of methods of welding . Types of welding used in the manufacture and installation of metal building structures . Basics of electric arc welding by melting electrode. The main processes occurring during welding by a melting electrode. Welding wire and electrodes. Protection of seam metal from atmospheric influences. Safety during welding . The main types of welding used in the manufacture of building metal structures. Hand arc welding. Manual arc welding by non-melting electrode in inert gas environment. Semi-automatic welding in carbon dioxide environment. Automatic welding under flux. Application of welding carriages and automatic trolleys in welding production. Application of industrial robots in welding production. Types of welds and welds performed by fusion electrode welding. Classification of welds. Classification of welded joints. Strength and quality of welded joints. Strength of welded joints. Quality control of welded joints . Calculation of welded joints. Compression and tensile joint calculation. Calculation of bending joints. Calculation of the joints on the cut (shift), Calculation of the angular seams . Calculation of angular sutures by the shear force applied with eccentricity. Calculation of angular seams on the action of mutually perpendicular shearing forces . Welding deformations and stresses. General concepts of deformations and stresses. Thermal processes during welding and the formation of welding stresses and deformations. Residual welding deformations and their impact on the performance and accuracy of structures. Main measures to reduce welding stresses and deformations. Weldability of steels. General information about the weldability of steels. Weldability indicators. Formation of hot and cold cracks during welding . Basics of the technological process of manufacturing of building metal structures . General scheme of technological process of manufacturing of building metal structures. Development of technology for assembly and welding of metal structures. Preparation of elements for welding . Welding of metal structures. Operational quality control . Bibliographic list