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Design bending strength about the y-y , fm.y.d fm. y . d =

Redistribution factor for a km = 0.7 rectangular section, km (Equation (4.4c) (EC5, 6.1.6))

Buckling resistance condition - lateral torsional buckling under major axis bending (4.5.1.2 (EC5, 6.3.3)):

Lateral stability factor, kcrit (4.5.1.2 (EC5, 6.3.3)):

Critical bending stress, CTm.crit = ffm.crit (equation (4.7c); EC5, equation (6.31))

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