While doing one of claculations for Column of Dia 900mm x ht 41m. PVELITE calculations show that maximum dynamic deflection as 26.52 mm under Wind Load calculations. But it shows 5180mm under " Wind deflection" calculations. I have checked design procedure. But it is very difficult to understand from chart. Let me know what is the procedure/formulae we follow for claculation at Wind Deflactio heading.