Bar 2 i X f

FIGURE 31.19 A laced column.

of inflection in the longitudinal element occur midway between the battens, the shear factor av is obtained as

where Eb is the modulus of elasticity of materials for batten plates, Ib is the moment inertia of all battens in one panel in the buckling plane, and If is the moment inertia of one side of the main components taken about the centroid axis of the flange in the buckling plane.

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