Structural design check slenderness about z axis

Effective length, /0, about z axis

/0z = 0.5/ [1 + k1 / (0.45 + k) ]05 [1 + k2 / (0.45 + k2) ]05

k2 = by inspection (pinned end assumed) = œ . /0z =05x 3850 x [1 +0.1 / (0.45+0.1) J05[1 +œ/(0.45+œ) j05 = 0.5 x 3850 x 1.087 x 1.41 = 0.77 x 3850 = 2965 mm

where i = radius of gyration = h / 3.46 4 = 3.46/0z / h = 3.46 x 2965 / 350

Limiting slenderness ratio, 4m <5.8.3.1(1)>

where

n = relative normal force = NEd / Acfcd

As 4 > 4mz column is slender about z axis

Radius Gyration Slenderness Ratio

Figure 5.13

First order moments

Figure 5.13

First order moments

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