25

2. Calculate (Ky)m by Equation 31.107

31.9.2 Columns with Battens

The battened column has a greater shear flexibility than either the laced column or the column with perforated cover plates, hence the effect of shear distortion must be taken into account in calculating the effective length of a column (Johnston 1976). For the battened members shown in Figure 31.20a, assuming that the points of inflection in the battens are at the batten midpoints and that the points

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