The Wood method, also known as the Merchant–Rankine–Wood method, is a structural analysis method which was developed to determine estimates for the effective buckling length of a compressed member included in a building frames, both in sway and a non-sway buckling modes.
According to this method, the ratio between the critical buckling length and the real length of a column is determined based on two redistribution coefficients,
The redistribution coefficients are obtained through the following expressions: where
are the stiffness coefficients for the adjacent length of columns.
Although this method was included in ENV 1993-1-1:1992, it is absent from EN 1993-1-1.