EVS-EN 1991-1-4/NA:2007

Estonian National Annex to EN 1991-1-4:2005.This part does not give guidance on the following aspects:— wind actions on lattice towers with non-parallel chords— wind actions on guyed masts and guyed chimneys— torsional vibrations, e.g. tall buildings with a central core— bridge deck vibrations from transverse wind turbulence— cable supported bridges— vibrations where more than the fundamental mode needs to be considere. NOTE 1 The National Annex may provide guidance on these aspects as non contradictory complementary information.— No additional method is given in the Estonian national annex.NOTE 2 For wind actions on guyed masts, guyed chimneys and lattice towers with non-parallel chords, see EN 1993-3-1, Annex A. NOTE 3 For wind actions on lighting columns, see EN 40.