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Buckling resistance condition (5.3.1

Relative slenderness about the z-z Xrel.z = —

As the relative slenderness ratio is greater than 0.3, conditions in 5.3.1(b) apply (EC5, 6.3.2(3)):

Factor for solid timber (equation (5.6); EC5, equation (6.29))

Instability factor, kz

Instability factor, kc.z

Instability factor condition (equation (8.18); EC5, equation (6.23)) - with bending stresses equal to zero)

h, — 0.5 • [1 + ßc • (Xrel.z - 0.3) + X2ei.J

0 0

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