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What is the difference between LW and LT in Window 1.5 'Effective Lengths - Members' and Window 1.6 'Effective Lengths - Set of Members'?

Answer

The length LT represents the buckling length for torsional buckling and lateral-torsional buckling under the systematic centric pressure. The length LT works similarly to Column D and Column G: a critical and buckling load is calculated for the design of a pure compressive force according to EN 1993‑1‑1, Section 6.3.1.4.

The length L W, however, is no effective length but the length to which the distribution of moments and shear force is related with the boundary conditions k z and k w (columns J and K) as well as the lateral intermediate supports. This length should i. d. R are not changed.

Keywords

Effective length Effective length Lateral-torsional buckling Stability Stability design Ea LT

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