This section is the applicable scope of the welded connection part: 1.1 This atlas is suitable for steel structure welded nodes using welded H-shaped steel in general industrial and civil buildings with a safety level of Level 2. 1.2 When the nodes in this atlas are used for components directly subjected to repeated dynamic loads, the fatigue strength should be calculated separately. 1.3 This atlas is applicable when the surface temperature of components is not greater than 150°C, and the calculated temperature in winter is not lower than -30°C. This section covers the scope of application of high-strength bolts: 1.1 This atlas is suitable for high-strength bolt nodes using welded H-shaped steel in general industrial and civil buildings with a safety level of Level 2. 1.2 When the nodes in this atlas are used for components directly subjected to repeated dynamic loads, the fatigue strength should be calculated separately. 1.3 This atlas is applicable when the surface temperature of components is not greater than 150°C, and the calculated temperature in winter is not lower than -30°C.