The inclinations and precambers are determined either in both directions of the member axis or, as described in DIN 18800 and EC3, in the governing direction.

It is also possible, however, to create a geometrically imperfect equivalent model based on the nodal displacements, buckling modes or eigenvalues. The model is then scaled by a user-defined ordinate value. Subsequently, the vectors of the displacements are added to the coordinates of the original, non-deformed RSTAB structure.

The generated imperfections are listed in a table. You can check the data directly on the RSTAB model to find out if RSIMP has applied imperfections to all members with a risk for buckling. By mouse-click, you can easily transfer the imperfections into an RSTAB load case where they can be adjusted, if necessary. 

Then, together with the corresponding main load cases (for example in case of changing load directions such as wind), the imperfection load cases will be superimposed in RSTAB in load groups. When imperfections are taken into account, and the calculation according to the second-order analysis has been successful, the buckling designs for any kind of cross-section are fulfilled, in accordance with DIN 18800 or EC 3, too. 

All results tables of RSIMP can be exported to MS Excel or OpenOffice.org Calc.