Steel Buildings in Europe

Part 2: Concept Design 2 - 19 3 CONCEPT DESIGN OF PORTAL FRAMES Steel portal frames are widely used because they combine structural efficiency with functional form. Various configurations of portal frame can be designed using the same structural concept as shown in Figure 3.1. 1 2 4 3 5 6 1 Duo-pitch portal frame 2 Curved portal frame (cellular beam) 3 Portal with internal offices 4 Portal with crane 5 Two-span portal frame 6 Portal with external offices Figure 3.1 Various types of portal frame