ETABS story accelarations ETABS story accelarations niravshah1964 (Civil/Environmental) (OP) 16 Jul 12 00:58 ETABS when displays story acceleration values, what does that value physical mean. Example: in UX direction acceleration of 0.8 means acceleration in X direction is 0.8 x g?? Can anybody confirm Thanks in advance RE: ETABS story accelarations niravshah1964 (Civil/Environmental) (OP) 17 Jul 12 09:57 I have got the answer: It is in the units displayed in main screen, so 0.8 in Knm unit is 0.8 m/sqsec in X direction. What is human comfort acceleration?? any idea. I think that is the reason Tuned mass dampner are provided in very tall bldg, to reduce acc against excitation due to cyclonic winds.