36 PORTAL FRAMES

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PORTAL FRAMES Version II 36 - 6 for n>0.2 M ndy = 1.56 M dy (1-n) (n+0.6) d) For Rectangular Hollow sections and Welded Box sections When the section is symmetric about both axes and without bolt holes: M ndz = M dz (1-n) / (1-0.5a w) d M dz M ndy = M dy (1-n) / (1-0.5a f) d M dy where a w = (A - 2 b t f ) / A d 0.5 a f = (A-2 h t w) / A d 0.5 e) Circular Hollow Tubes without Bolt Holes