Steel Buildings in Europe

Part 4: Detailed Design of Portal Frames 4 - 29 6.4.2 Application in practice The flowcharts in Figures 6.4, 6.5 and 6.6 summarise the practical application of the different stable length formulae for any member segment adjacent to a plastic hinge. In the absence of a plastic hinge, the member segment is verified by conventional elastic criteria using Expressions 6.61 and 6.62. Figure 6.4 Decision tree for selecting appropriate stable length criteria for any segment in a portal frame – Sheet 1