Steel Buildings in Europe

Title APPENDIX D Worked Example: Design of portal frame using elastic analysis 26 of 44 4 - 107 7.8.3. Bending moment resistance EN 1993-1-1 §6.2.5 M pl,y,Rd = M0 pl,y y  f W = 6 3 10 1, 0 355 10 1702     = 604 kNm M y,Ed = 356 kNm < 604 kNm OK 7.9. Out-of-plane buckling The out-of-plane buckling interaction is verified with expression (6.62) from EN 1993-1-1 1, 0 b,Rd y,Ed z,b,Rd Ed   M M k N N zy The rafter should be verified between torsional restraints. If advantage is taken of intermediate restraints to the tension flange, the spacing of the intermediate restraints must also be verified. 7.9.1. Mid-span region The purlin spacing in this region is 1700 mm. 1700 mm 1 1 Mid-span region 354 kNm 351 kNm 1700 356 kNm 1 1: Bending moment Flexural buckling resistance about minor axis bending, N b,z,Rd b h  190 450  2,37 t f  14,6 mm buckling about z-z axis  Curve b for hot rolled I sections   z  0,34 EN 1993-1-1 Table 6.1 Table 6.2